1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
5 * Test code for seccomp bpf.
12 * glibc 2.26 and later have SIGSYS in siginfo_t. Before that,
13 * we need to use the kernel's siginfo.h file and trick glibc
16 #if !__GLIBC_PREREQ(2, 26)
17 # include <asm/siginfo.h>
18 # define __have_siginfo_t 1
19 # define __have_sigval_t 1
20 # define __have_sigevent_t 1
24 #include <linux/filter.h>
25 #include <sys/prctl.h>
26 #include <sys/ptrace.h>
28 #include <linux/prctl.h>
29 #include <linux/ptrace.h>
30 #include <linux/seccomp.h>
32 #include <semaphore.h>
39 #include <linux/elf.h>
41 #include <sys/utsname.h>
42 #include <sys/fcntl.h>
44 #include <sys/times.h>
45 #include <sys/socket.h>
46 #include <sys/ioctl.h>
47 #include <linux/kcmp.h>
48 #include <sys/resource.h>
51 #include <sys/syscall.h>
54 #include "../kselftest_harness.h"
55 #include "../clone3/clone3_selftests.h"
57 /* Attempt to de-conflict with the selftests tree. */
59 #define SKIP(s, ...) XFAIL(s, ##__VA_ARGS__)
62 #ifndef PR_SET_PTRACER
63 # define PR_SET_PTRACER 0x59616d61
66 #ifndef PR_SET_NO_NEW_PRIVS
67 #define PR_SET_NO_NEW_PRIVS 38
68 #define PR_GET_NO_NEW_PRIVS 39
71 #ifndef PR_SECCOMP_EXT
72 #define PR_SECCOMP_EXT 43
75 #ifndef SECCOMP_EXT_ACT
76 #define SECCOMP_EXT_ACT 1
79 #ifndef SECCOMP_EXT_ACT_TSYNC
80 #define SECCOMP_EXT_ACT_TSYNC 1
83 #ifndef SECCOMP_MODE_STRICT
84 #define SECCOMP_MODE_STRICT 1
87 #ifndef SECCOMP_MODE_FILTER
88 #define SECCOMP_MODE_FILTER 2
91 #ifndef SECCOMP_RET_ALLOW
95 __u64 instruction_pointer
;
100 #ifndef SECCOMP_RET_KILL_PROCESS
101 #define SECCOMP_RET_KILL_PROCESS 0x80000000U /* kill the process */
102 #define SECCOMP_RET_KILL_THREAD 0x00000000U /* kill the thread */
104 #ifndef SECCOMP_RET_KILL
105 #define SECCOMP_RET_KILL SECCOMP_RET_KILL_THREAD
106 #define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
107 #define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
108 #define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */
109 #define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */
111 #ifndef SECCOMP_RET_LOG
112 #define SECCOMP_RET_LOG 0x7ffc0000U /* allow after logging */
116 # if defined(__i386__)
117 # define __NR_seccomp 354
118 # elif defined(__x86_64__)
119 # define __NR_seccomp 317
120 # elif defined(__arm__)
121 # define __NR_seccomp 383
122 # elif defined(__aarch64__)
123 # define __NR_seccomp 277
124 # elif defined(__riscv)
125 # define __NR_seccomp 277
126 # elif defined(__csky__)
127 # define __NR_seccomp 277
128 # elif defined(__hppa__)
129 # define __NR_seccomp 338
130 # elif defined(__powerpc__)
131 # define __NR_seccomp 358
132 # elif defined(__s390__)
133 # define __NR_seccomp 348
134 # elif defined(__xtensa__)
135 # define __NR_seccomp 337
137 # warning "seccomp syscall number unknown for this architecture"
138 # define __NR_seccomp 0xffff
142 #ifndef SECCOMP_SET_MODE_STRICT
143 #define SECCOMP_SET_MODE_STRICT 0
146 #ifndef SECCOMP_SET_MODE_FILTER
147 #define SECCOMP_SET_MODE_FILTER 1
150 #ifndef SECCOMP_GET_ACTION_AVAIL
151 #define SECCOMP_GET_ACTION_AVAIL 2
154 #ifndef SECCOMP_GET_NOTIF_SIZES
155 #define SECCOMP_GET_NOTIF_SIZES 3
158 #ifndef SECCOMP_FILTER_FLAG_TSYNC
159 #define SECCOMP_FILTER_FLAG_TSYNC (1UL << 0)
162 #ifndef SECCOMP_FILTER_FLAG_LOG
163 #define SECCOMP_FILTER_FLAG_LOG (1UL << 1)
166 #ifndef SECCOMP_FILTER_FLAG_SPEC_ALLOW
167 #define SECCOMP_FILTER_FLAG_SPEC_ALLOW (1UL << 2)
170 #ifndef PTRACE_SECCOMP_GET_METADATA
171 #define PTRACE_SECCOMP_GET_METADATA 0x420d
173 struct seccomp_metadata
{
174 __u64 filter_off
; /* Input: which filter */
175 __u64 flags
; /* Output: filter's flags */
179 #ifndef SECCOMP_FILTER_FLAG_NEW_LISTENER
180 #define SECCOMP_FILTER_FLAG_NEW_LISTENER (1UL << 3)
183 #ifndef SECCOMP_RET_USER_NOTIF
184 #define SECCOMP_RET_USER_NOTIF 0x7fc00000U
186 #define SECCOMP_IOC_MAGIC '!'
187 #define SECCOMP_IO(nr) _IO(SECCOMP_IOC_MAGIC, nr)
188 #define SECCOMP_IOR(nr, type) _IOR(SECCOMP_IOC_MAGIC, nr, type)
189 #define SECCOMP_IOW(nr, type) _IOW(SECCOMP_IOC_MAGIC, nr, type)
190 #define SECCOMP_IOWR(nr, type) _IOWR(SECCOMP_IOC_MAGIC, nr, type)
192 /* Flags for seccomp notification fd ioctl. */
193 #define SECCOMP_IOCTL_NOTIF_RECV SECCOMP_IOWR(0, struct seccomp_notif)
194 #define SECCOMP_IOCTL_NOTIF_SEND SECCOMP_IOWR(1, \
195 struct seccomp_notif_resp)
196 #define SECCOMP_IOCTL_NOTIF_ID_VALID SECCOMP_IOW(2, __u64)
198 struct seccomp_notif
{
202 struct seccomp_data data
;
205 struct seccomp_notif_resp
{
212 struct seccomp_notif_sizes
{
214 __u16 seccomp_notif_resp
;
219 #ifndef SECCOMP_IOCTL_NOTIF_ADDFD
220 /* On success, the return value is the remote process's added fd number */
221 #define SECCOMP_IOCTL_NOTIF_ADDFD SECCOMP_IOW(3, \
222 struct seccomp_notif_addfd)
224 /* valid flags for seccomp_notif_addfd */
225 #define SECCOMP_ADDFD_FLAG_SETFD (1UL << 0) /* Specify remote fd */
227 struct seccomp_notif_addfd
{
236 struct seccomp_notif_addfd_small
{
240 #define SECCOMP_IOCTL_NOTIF_ADDFD_SMALL \
241 SECCOMP_IOW(3, struct seccomp_notif_addfd_small)
243 struct seccomp_notif_addfd_big
{
245 struct seccomp_notif_addfd addfd
;
246 char buf
[sizeof(struct seccomp_notif_addfd
) + 8];
249 #define SECCOMP_IOCTL_NOTIF_ADDFD_BIG \
250 SECCOMP_IOWR(3, struct seccomp_notif_addfd_big)
252 #ifndef PTRACE_EVENTMSG_SYSCALL_ENTRY
253 #define PTRACE_EVENTMSG_SYSCALL_ENTRY 1
254 #define PTRACE_EVENTMSG_SYSCALL_EXIT 2
257 #ifndef SECCOMP_USER_NOTIF_FLAG_CONTINUE
258 #define SECCOMP_USER_NOTIF_FLAG_CONTINUE 0x00000001
261 #ifndef SECCOMP_FILTER_FLAG_TSYNC_ESRCH
262 #define SECCOMP_FILTER_FLAG_TSYNC_ESRCH (1UL << 4)
266 int seccomp(unsigned int op
, unsigned int flags
, void *args
)
269 return syscall(__NR_seccomp
, op
, flags
, args
);
273 #if __BYTE_ORDER == __LITTLE_ENDIAN
274 #define syscall_arg(_n) (offsetof(struct seccomp_data, args[_n]))
275 #elif __BYTE_ORDER == __BIG_ENDIAN
276 #define syscall_arg(_n) (offsetof(struct seccomp_data, args[_n]) + sizeof(__u32))
278 #error "wut? Unknown __BYTE_ORDER?!"
281 #define SIBLING_EXIT_UNKILLED 0xbadbeef
282 #define SIBLING_EXIT_FAILURE 0xbadface
283 #define SIBLING_EXIT_NEWPRIVS 0xbadfeed
285 static int __filecmp(pid_t pid1
, pid_t pid2
, int fd1
, int fd2
)
289 return syscall(__NR_kcmp
, pid1
, pid2
, KCMP_FILE
, fd1
, fd2
);
296 /* Have TH_LOG report actual location filecmp() is used. */
297 #define filecmp(pid1, pid2, fd1, fd2) ({ \
300 _ret = __filecmp(pid1, pid2, fd1, fd2); \
302 if (_ret < 0 && errno == ENOSYS) { \
303 TH_LOG("kcmp() syscall missing (test is less accurate)");\
313 ret
= __filecmp(getpid(), getpid(), 1, 1);
315 if (ret
!= 0 && errno
== ENOSYS
)
316 SKIP(return, "Kernel does not support kcmp() (missing CONFIG_CHECKPOINT_RESTORE?)");
319 TEST(mode_strict_support
)
323 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_STRICT
, NULL
, NULL
, NULL
);
325 TH_LOG("Kernel does not support CONFIG_SECCOMP");
327 syscall(__NR_exit
, 0);
330 TEST_SIGNAL(mode_strict_cannot_call_prctl
, SIGKILL
)
334 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_STRICT
, NULL
, NULL
, NULL
);
336 TH_LOG("Kernel does not support CONFIG_SECCOMP");
338 syscall(__NR_prctl
, PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
,
341 TH_LOG("Unreachable!");
345 /* Note! This doesn't test no new privs behavior */
346 TEST(no_new_privs_support
)
350 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
352 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
356 /* Tests kernel support by checking for a copy_from_user() fault on NULL. */
357 TEST(mode_filter_support
)
361 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, NULL
, 0, 0);
363 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
365 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, NULL
, NULL
, NULL
);
367 EXPECT_EQ(EFAULT
, errno
) {
368 TH_LOG("Kernel does not support CONFIG_SECCOMP_FILTER!");
372 TEST(mode_filter_without_nnp
)
374 struct sock_filter filter
[] = {
375 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
377 struct sock_fprog prog
= {
378 .len
= (unsigned short)ARRAY_SIZE(filter
),
383 ret
= prctl(PR_GET_NO_NEW_PRIVS
, 0, NULL
, 0, 0);
385 TH_LOG("Expected 0 or unsupported for NO_NEW_PRIVS");
388 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
389 /* Succeeds with CAP_SYS_ADMIN, fails without */
390 /* TODO(wad) check caps not euid */
393 EXPECT_EQ(EACCES
, errno
);
399 #define MAX_INSNS_PER_PATH 32768
401 TEST(filter_size_limits
)
404 int count
= BPF_MAXINSNS
+ 1;
405 struct sock_filter allow
[] = {
406 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
408 struct sock_filter
*filter
;
409 struct sock_fprog prog
= { };
412 filter
= calloc(count
, sizeof(*filter
));
413 ASSERT_NE(NULL
, filter
);
415 for (i
= 0; i
< count
; i
++)
416 filter
[i
] = allow
[0];
418 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
421 prog
.filter
= filter
;
424 /* Too many filter instructions in a single filter. */
425 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
427 TH_LOG("Installing %d insn filter was allowed", prog
.len
);
430 /* One less is okay, though. */
432 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
434 TH_LOG("Installing %d insn filter wasn't allowed", prog
.len
);
438 TEST(filter_chain_limits
)
441 int count
= BPF_MAXINSNS
;
442 struct sock_filter allow
[] = {
443 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
445 struct sock_filter
*filter
;
446 struct sock_fprog prog
= { };
449 filter
= calloc(count
, sizeof(*filter
));
450 ASSERT_NE(NULL
, filter
);
452 for (i
= 0; i
< count
; i
++)
453 filter
[i
] = allow
[0];
455 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
458 prog
.filter
= filter
;
461 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
466 /* Too many total filter instructions. */
467 for (i
= 0; i
< MAX_INSNS_PER_PATH
; i
++) {
468 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
473 TH_LOG("Allowed %d %d-insn filters (total with penalties:%d)",
474 i
, count
, i
* (count
+ 4));
478 TEST(mode_filter_cannot_move_to_strict
)
480 struct sock_filter filter
[] = {
481 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
483 struct sock_fprog prog
= {
484 .len
= (unsigned short)ARRAY_SIZE(filter
),
489 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
492 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
495 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_STRICT
, NULL
, 0, 0);
497 EXPECT_EQ(EINVAL
, errno
);
501 TEST(mode_filter_get_seccomp
)
503 struct sock_filter filter
[] = {
504 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
506 struct sock_fprog prog
= {
507 .len
= (unsigned short)ARRAY_SIZE(filter
),
512 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
515 ret
= prctl(PR_GET_SECCOMP
, 0, 0, 0, 0);
518 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
521 ret
= prctl(PR_GET_SECCOMP
, 0, 0, 0, 0);
528 struct sock_filter filter
[] = {
529 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
531 struct sock_fprog prog
= {
532 .len
= (unsigned short)ARRAY_SIZE(filter
),
537 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
540 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
546 struct sock_filter filter
[] = {
548 struct sock_fprog prog
= {
549 .len
= (unsigned short)ARRAY_SIZE(filter
),
554 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
557 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
559 EXPECT_EQ(EINVAL
, errno
);
564 struct sock_filter filter
[] = {
565 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_LOG
),
567 struct sock_fprog prog
= {
568 .len
= (unsigned short)ARRAY_SIZE(filter
),
572 pid_t parent
= getppid();
574 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
577 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
580 /* getppid() should succeed and be logged (no check for logging) */
581 EXPECT_EQ(parent
, syscall(__NR_getppid
));
584 TEST_SIGNAL(unknown_ret_is_kill_inside
, SIGSYS
)
586 struct sock_filter filter
[] = {
587 BPF_STMT(BPF_RET
|BPF_K
, 0x10000000U
),
589 struct sock_fprog prog
= {
590 .len
= (unsigned short)ARRAY_SIZE(filter
),
595 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
598 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
600 EXPECT_EQ(0, syscall(__NR_getpid
)) {
601 TH_LOG("getpid() shouldn't ever return");
605 /* return code >= 0x80000000 is unused. */
606 TEST_SIGNAL(unknown_ret_is_kill_above_allow
, SIGSYS
)
608 struct sock_filter filter
[] = {
609 BPF_STMT(BPF_RET
|BPF_K
, 0x90000000U
),
611 struct sock_fprog prog
= {
612 .len
= (unsigned short)ARRAY_SIZE(filter
),
617 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
620 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
622 EXPECT_EQ(0, syscall(__NR_getpid
)) {
623 TH_LOG("getpid() shouldn't ever return");
627 TEST_SIGNAL(KILL_all
, SIGSYS
)
629 struct sock_filter filter
[] = {
630 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
632 struct sock_fprog prog
= {
633 .len
= (unsigned short)ARRAY_SIZE(filter
),
638 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
641 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
645 TEST_SIGNAL(KILL_one
, SIGSYS
)
647 struct sock_filter filter
[] = {
648 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
649 offsetof(struct seccomp_data
, nr
)),
650 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 0, 1),
651 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
652 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
654 struct sock_fprog prog
= {
655 .len
= (unsigned short)ARRAY_SIZE(filter
),
659 pid_t parent
= getppid();
661 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
664 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
667 EXPECT_EQ(parent
, syscall(__NR_getppid
));
668 /* getpid() should never return. */
669 EXPECT_EQ(0, syscall(__NR_getpid
));
672 TEST_SIGNAL(KILL_one_arg_one
, SIGSYS
)
675 struct sock_filter filter
[] = {
676 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
677 offsetof(struct seccomp_data
, nr
)),
678 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_times
, 1, 0),
679 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
680 /* Only both with lower 32-bit for now. */
681 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
, syscall_arg(0)),
682 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
,
683 (unsigned long)&fatal_address
, 0, 1),
684 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
685 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
687 struct sock_fprog prog
= {
688 .len
= (unsigned short)ARRAY_SIZE(filter
),
692 pid_t parent
= getppid();
694 clock_t clock
= times(&timebuf
);
696 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
699 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
702 EXPECT_EQ(parent
, syscall(__NR_getppid
));
703 EXPECT_LE(clock
, syscall(__NR_times
, &timebuf
));
704 /* times() should never return. */
705 EXPECT_EQ(0, syscall(__NR_times
, &fatal_address
));
708 TEST_SIGNAL(KILL_one_arg_six
, SIGSYS
)
711 int sysno
= __NR_mmap
;
713 int sysno
= __NR_mmap2
;
715 struct sock_filter filter
[] = {
716 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
717 offsetof(struct seccomp_data
, nr
)),
718 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, sysno
, 1, 0),
719 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
720 /* Only both with lower 32-bit for now. */
721 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
, syscall_arg(5)),
722 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, 0x0C0FFEE, 0, 1),
723 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
724 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
726 struct sock_fprog prog
= {
727 .len
= (unsigned short)ARRAY_SIZE(filter
),
731 pid_t parent
= getppid();
734 int page_size
= sysconf(_SC_PAGESIZE
);
736 ASSERT_LT(0, page_size
);
738 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
741 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
744 fd
= open("/dev/zero", O_RDONLY
);
747 EXPECT_EQ(parent
, syscall(__NR_getppid
));
748 map1
= (void *)syscall(sysno
,
749 NULL
, page_size
, PROT_READ
, MAP_PRIVATE
, fd
, page_size
);
750 EXPECT_NE(MAP_FAILED
, map1
);
751 /* mmap2() should never return. */
752 map2
= (void *)syscall(sysno
,
753 NULL
, page_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0x0C0FFEE);
754 EXPECT_EQ(MAP_FAILED
, map2
);
756 /* The test failed, so clean up the resources. */
757 munmap(map1
, page_size
);
758 munmap(map2
, page_size
);
762 /* This is a thread task to die via seccomp filter violation. */
763 void *kill_thread(void *data
)
765 bool die
= (bool)data
;
768 prctl(PR_GET_SECCOMP
, 0, 0, 0, 0);
769 return (void *)SIBLING_EXIT_FAILURE
;
772 return (void *)SIBLING_EXIT_UNKILLED
;
775 /* Prepare a thread that will kill itself or both of us. */
776 void kill_thread_or_group(struct __test_metadata
*_metadata
, bool kill_process
)
780 /* Kill only when calling __NR_prctl. */
781 struct sock_filter filter_thread
[] = {
782 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
783 offsetof(struct seccomp_data
, nr
)),
784 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_prctl
, 0, 1),
785 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL_THREAD
),
786 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
788 struct sock_fprog prog_thread
= {
789 .len
= (unsigned short)ARRAY_SIZE(filter_thread
),
790 .filter
= filter_thread
,
792 struct sock_filter filter_process
[] = {
793 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
794 offsetof(struct seccomp_data
, nr
)),
795 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_prctl
, 0, 1),
796 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL_PROCESS
),
797 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
799 struct sock_fprog prog_process
= {
800 .len
= (unsigned short)ARRAY_SIZE(filter_process
),
801 .filter
= filter_process
,
804 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
805 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
808 ASSERT_EQ(0, seccomp(SECCOMP_SET_MODE_FILTER
, 0,
809 kill_process
? &prog_process
: &prog_thread
));
812 * Add the KILL_THREAD rule again to make sure that the KILL_PROCESS
813 * flag cannot be downgraded by a new filter.
815 ASSERT_EQ(0, seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog_thread
));
817 /* Start a thread that will exit immediately. */
818 ASSERT_EQ(0, pthread_create(&thread
, NULL
, kill_thread
, (void *)false));
819 ASSERT_EQ(0, pthread_join(thread
, &status
));
820 ASSERT_EQ(SIBLING_EXIT_UNKILLED
, (unsigned long)status
);
822 /* Start a thread that will die immediately. */
823 ASSERT_EQ(0, pthread_create(&thread
, NULL
, kill_thread
, (void *)true));
824 ASSERT_EQ(0, pthread_join(thread
, &status
));
825 ASSERT_NE(SIBLING_EXIT_FAILURE
, (unsigned long)status
);
828 * If we get here, only the spawned thread died. Let the parent know
829 * the whole process didn't die (i.e. this thread, the spawner,
841 ASSERT_LE(0, child_pid
);
842 if (child_pid
== 0) {
843 kill_thread_or_group(_metadata
, false);
847 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
849 /* If only the thread was killed, we'll see exit 42. */
850 ASSERT_TRUE(WIFEXITED(status
));
851 ASSERT_EQ(42, WEXITSTATUS(status
));
860 ASSERT_LE(0, child_pid
);
861 if (child_pid
== 0) {
862 kill_thread_or_group(_metadata
, true);
866 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
868 /* If the entire process was killed, we'll see SIGSYS. */
869 ASSERT_TRUE(WIFSIGNALED(status
));
870 ASSERT_EQ(SIGSYS
, WTERMSIG(status
));
873 /* TODO(wad) add 64-bit versus 32-bit arg tests. */
874 TEST(arg_out_of_range
)
876 struct sock_filter filter
[] = {
877 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
, syscall_arg(6)),
878 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
880 struct sock_fprog prog
= {
881 .len
= (unsigned short)ARRAY_SIZE(filter
),
886 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
889 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
);
891 EXPECT_EQ(EINVAL
, errno
);
894 #define ERRNO_FILTER(name, errno) \
895 struct sock_filter _read_filter_##name[] = { \
896 BPF_STMT(BPF_LD|BPF_W|BPF_ABS, \
897 offsetof(struct seccomp_data, nr)), \
898 BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_read, 0, 1), \
899 BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ERRNO | errno), \
900 BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW), \
902 struct sock_fprog prog_##name = { \
903 .len = (unsigned short)ARRAY_SIZE(_read_filter_##name), \
904 .filter = _read_filter_##name, \
907 /* Make sure basic errno values are correctly passed through a filter. */
910 ERRNO_FILTER(valid
, E2BIG
);
912 pid_t parent
= getppid();
914 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
917 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_valid
);
920 EXPECT_EQ(parent
, syscall(__NR_getppid
));
921 EXPECT_EQ(-1, read(0, NULL
, 0));
922 EXPECT_EQ(E2BIG
, errno
);
925 /* Make sure an errno of zero is correctly handled by the arch code. */
928 ERRNO_FILTER(zero
, 0);
930 pid_t parent
= getppid();
932 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
935 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_zero
);
938 EXPECT_EQ(parent
, syscall(__NR_getppid
));
939 /* "errno" of 0 is ok. */
940 EXPECT_EQ(0, read(0, NULL
, 0));
944 * The SECCOMP_RET_DATA mask is 16 bits wide, but errno is smaller.
945 * This tests that the errno value gets capped correctly, fixed by
946 * 580c57f10768 ("seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO").
950 ERRNO_FILTER(capped
, 4096);
952 pid_t parent
= getppid();
954 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
957 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_capped
);
960 EXPECT_EQ(parent
, syscall(__NR_getppid
));
961 EXPECT_EQ(-1, read(0, NULL
, 0));
962 EXPECT_EQ(4095, errno
);
966 * Filters are processed in reverse order: last applied is executed first.
967 * Since only the SECCOMP_RET_ACTION mask is tested for return values, the
968 * SECCOMP_RET_DATA mask results will follow the most recently applied
969 * matching filter return (and not the lowest or highest value).
973 ERRNO_FILTER(first
, 11);
974 ERRNO_FILTER(second
, 13);
975 ERRNO_FILTER(third
, 12);
977 pid_t parent
= getppid();
979 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
982 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_first
);
985 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_second
);
988 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog_third
);
991 EXPECT_EQ(parent
, syscall(__NR_getppid
));
992 EXPECT_EQ(-1, read(0, NULL
, 0));
993 EXPECT_EQ(12, errno
);
997 struct sock_fprog prog
;
1002 struct sock_filter filter
[] = {
1003 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1004 offsetof(struct seccomp_data
, nr
)),
1005 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 0, 1),
1006 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRAP
),
1007 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1010 memset(&self
->prog
, 0, sizeof(self
->prog
));
1011 self
->prog
.filter
= malloc(sizeof(filter
));
1012 ASSERT_NE(NULL
, self
->prog
.filter
);
1013 memcpy(self
->prog
.filter
, filter
, sizeof(filter
));
1014 self
->prog
.len
= (unsigned short)ARRAY_SIZE(filter
);
1017 FIXTURE_TEARDOWN(TRAP
)
1019 if (self
->prog
.filter
)
1020 free(self
->prog
.filter
);
1023 TEST_F_SIGNAL(TRAP
, dfl
, SIGSYS
)
1027 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1030 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->prog
);
1032 syscall(__NR_getpid
);
1035 /* Ensure that SIGSYS overrides SIG_IGN */
1036 TEST_F_SIGNAL(TRAP
, ign
, SIGSYS
)
1040 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1043 signal(SIGSYS
, SIG_IGN
);
1045 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->prog
);
1047 syscall(__NR_getpid
);
1050 static siginfo_t TRAP_info
;
1051 static volatile int TRAP_nr
;
1052 static void TRAP_action(int nr
, siginfo_t
*info
, void *void_context
)
1054 memcpy(&TRAP_info
, info
, sizeof(TRAP_info
));
1058 TEST_F(TRAP
, handler
)
1061 struct sigaction act
;
1064 memset(&act
, 0, sizeof(act
));
1066 sigaddset(&mask
, SIGSYS
);
1068 act
.sa_sigaction
= &TRAP_action
;
1069 act
.sa_flags
= SA_SIGINFO
;
1070 ret
= sigaction(SIGSYS
, &act
, NULL
);
1072 TH_LOG("sigaction failed");
1074 ret
= sigprocmask(SIG_UNBLOCK
, &mask
, NULL
);
1076 TH_LOG("sigprocmask failed");
1079 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1081 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->prog
);
1084 memset(&TRAP_info
, 0, sizeof(TRAP_info
));
1085 /* Expect the registers to be rolled back. (nr = error) may vary
1087 ret
= syscall(__NR_getpid
);
1088 /* Silence gcc warning about volatile. */
1090 EXPECT_EQ(SIGSYS
, test
);
1091 struct local_sigsys
{
1092 void *_call_addr
; /* calling user insn */
1093 int _syscall
; /* triggering system call number */
1094 unsigned int _arch
; /* AUDIT_ARCH_* of syscall */
1095 } *sigsys
= (struct local_sigsys
*)
1097 &(TRAP_info
.si_call_addr
);
1101 EXPECT_EQ(__NR_getpid
, sigsys
->_syscall
);
1102 /* Make sure arch is non-zero. */
1103 EXPECT_NE(0, sigsys
->_arch
);
1104 EXPECT_NE(0, (unsigned long)sigsys
->_call_addr
);
1107 FIXTURE(precedence
) {
1108 struct sock_fprog allow
;
1109 struct sock_fprog log
;
1110 struct sock_fprog trace
;
1111 struct sock_fprog error
;
1112 struct sock_fprog trap
;
1113 struct sock_fprog kill
;
1116 FIXTURE_SETUP(precedence
)
1118 struct sock_filter allow_insns
[] = {
1119 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1121 struct sock_filter log_insns
[] = {
1122 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1123 offsetof(struct seccomp_data
, nr
)),
1124 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 1, 0),
1125 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1126 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_LOG
),
1128 struct sock_filter trace_insns
[] = {
1129 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1130 offsetof(struct seccomp_data
, nr
)),
1131 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 1, 0),
1132 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1133 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
),
1135 struct sock_filter error_insns
[] = {
1136 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1137 offsetof(struct seccomp_data
, nr
)),
1138 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 1, 0),
1139 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1140 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ERRNO
),
1142 struct sock_filter trap_insns
[] = {
1143 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1144 offsetof(struct seccomp_data
, nr
)),
1145 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 1, 0),
1146 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1147 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRAP
),
1149 struct sock_filter kill_insns
[] = {
1150 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1151 offsetof(struct seccomp_data
, nr
)),
1152 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 1, 0),
1153 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1154 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
1157 memset(self
, 0, sizeof(*self
));
1158 #define FILTER_ALLOC(_x) \
1159 self->_x.filter = malloc(sizeof(_x##_insns)); \
1160 ASSERT_NE(NULL, self->_x.filter); \
1161 memcpy(self->_x.filter, &_x##_insns, sizeof(_x##_insns)); \
1162 self->_x.len = (unsigned short)ARRAY_SIZE(_x##_insns)
1163 FILTER_ALLOC(allow
);
1165 FILTER_ALLOC(trace
);
1166 FILTER_ALLOC(error
);
1171 FIXTURE_TEARDOWN(precedence
)
1173 #define FILTER_FREE(_x) if (self->_x.filter) free(self->_x.filter)
1182 TEST_F(precedence
, allow_ok
)
1184 pid_t parent
, res
= 0;
1188 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1191 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1193 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1195 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1197 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1199 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trap
);
1201 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->kill
);
1203 /* Should work just fine. */
1204 res
= syscall(__NR_getppid
);
1205 EXPECT_EQ(parent
, res
);
1208 TEST_F_SIGNAL(precedence
, kill_is_highest
, SIGSYS
)
1210 pid_t parent
, res
= 0;
1214 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1217 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1219 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1221 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1223 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1225 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trap
);
1227 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->kill
);
1229 /* Should work just fine. */
1230 res
= syscall(__NR_getppid
);
1231 EXPECT_EQ(parent
, res
);
1232 /* getpid() should never return. */
1233 res
= syscall(__NR_getpid
);
1237 TEST_F_SIGNAL(precedence
, kill_is_highest_in_any_order
, SIGSYS
)
1243 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1246 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1248 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->kill
);
1250 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1252 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1254 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1256 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trap
);
1258 /* Should work just fine. */
1259 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1260 /* getpid() should never return. */
1261 EXPECT_EQ(0, syscall(__NR_getpid
));
1264 TEST_F_SIGNAL(precedence
, trap_is_second
, SIGSYS
)
1270 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1273 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1275 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1277 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1279 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1281 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trap
);
1283 /* Should work just fine. */
1284 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1285 /* getpid() should never return. */
1286 EXPECT_EQ(0, syscall(__NR_getpid
));
1289 TEST_F_SIGNAL(precedence
, trap_is_second_in_any_order
, SIGSYS
)
1295 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1298 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1300 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trap
);
1302 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1304 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1306 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1308 /* Should work just fine. */
1309 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1310 /* getpid() should never return. */
1311 EXPECT_EQ(0, syscall(__NR_getpid
));
1314 TEST_F(precedence
, errno_is_third
)
1320 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1323 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1325 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1327 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1329 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1331 /* Should work just fine. */
1332 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1333 EXPECT_EQ(0, syscall(__NR_getpid
));
1336 TEST_F(precedence
, errno_is_third_in_any_order
)
1342 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1345 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1347 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->error
);
1349 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1351 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1353 /* Should work just fine. */
1354 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1355 EXPECT_EQ(0, syscall(__NR_getpid
));
1358 TEST_F(precedence
, trace_is_fourth
)
1364 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1367 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1369 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1371 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1373 /* Should work just fine. */
1374 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1376 EXPECT_EQ(-1, syscall(__NR_getpid
));
1379 TEST_F(precedence
, trace_is_fourth_in_any_order
)
1385 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1388 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->trace
);
1390 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1392 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1394 /* Should work just fine. */
1395 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1397 EXPECT_EQ(-1, syscall(__NR_getpid
));
1400 TEST_F(precedence
, log_is_fifth
)
1402 pid_t mypid
, parent
;
1407 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1410 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1412 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1414 /* Should work just fine. */
1415 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1416 /* Should also work just fine */
1417 EXPECT_EQ(mypid
, syscall(__NR_getpid
));
1420 TEST_F(precedence
, log_is_fifth_in_any_order
)
1422 pid_t mypid
, parent
;
1427 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1430 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->log
);
1432 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->allow
);
1434 /* Should work just fine. */
1435 EXPECT_EQ(parent
, syscall(__NR_getppid
));
1436 /* Should also work just fine */
1437 EXPECT_EQ(mypid
, syscall(__NR_getpid
));
1440 #ifndef PTRACE_O_TRACESECCOMP
1441 #define PTRACE_O_TRACESECCOMP 0x00000080
1444 /* Catch the Ubuntu 12.04 value error. */
1445 #if PTRACE_EVENT_SECCOMP != 7
1446 #undef PTRACE_EVENT_SECCOMP
1449 #ifndef PTRACE_EVENT_SECCOMP
1450 #define PTRACE_EVENT_SECCOMP 7
1453 #define IS_SECCOMP_EVENT(status) ((status >> 16) == PTRACE_EVENT_SECCOMP)
1454 bool tracer_running
;
1455 void tracer_stop(int sig
)
1457 tracer_running
= false;
1460 typedef void tracer_func_t(struct __test_metadata
*_metadata
,
1461 pid_t tracee
, int status
, void *args
);
1463 void start_tracer(struct __test_metadata
*_metadata
, int fd
, pid_t tracee
,
1464 tracer_func_t tracer_func
, void *args
, bool ptrace_syscall
)
1467 struct sigaction action
= {
1468 .sa_handler
= tracer_stop
,
1471 /* Allow external shutdown. */
1472 tracer_running
= true;
1473 ASSERT_EQ(0, sigaction(SIGUSR1
, &action
, NULL
));
1476 while (ret
== -1 && errno
!= EINVAL
)
1477 ret
= ptrace(PTRACE_ATTACH
, tracee
, NULL
, 0);
1479 kill(tracee
, SIGKILL
);
1481 /* Wait for attach stop */
1484 ret
= ptrace(PTRACE_SETOPTIONS
, tracee
, NULL
, ptrace_syscall
?
1485 PTRACE_O_TRACESYSGOOD
:
1486 PTRACE_O_TRACESECCOMP
);
1488 TH_LOG("Failed to set PTRACE_O_TRACESECCOMP");
1489 kill(tracee
, SIGKILL
);
1491 ret
= ptrace(ptrace_syscall
? PTRACE_SYSCALL
: PTRACE_CONT
,
1495 /* Unblock the tracee */
1496 ASSERT_EQ(1, write(fd
, "A", 1));
1497 ASSERT_EQ(0, close(fd
));
1499 /* Run until we're shut down. Must assert to stop execution. */
1500 while (tracer_running
) {
1503 if (wait(&status
) != tracee
)
1505 if (WIFSIGNALED(status
) || WIFEXITED(status
))
1506 /* Child is dead. Time to go. */
1509 /* Check if this is a seccomp event. */
1510 ASSERT_EQ(!ptrace_syscall
, IS_SECCOMP_EVENT(status
));
1512 tracer_func(_metadata
, tracee
, status
, args
);
1514 ret
= ptrace(ptrace_syscall
? PTRACE_SYSCALL
: PTRACE_CONT
,
1518 /* Directly report the status of our test harness results. */
1519 syscall(__NR_exit
, _metadata
->passed
? EXIT_SUCCESS
: EXIT_FAILURE
);
1522 /* Common tracer setup/teardown functions. */
1523 void cont_handler(int num
)
1525 pid_t
setup_trace_fixture(struct __test_metadata
*_metadata
,
1526 tracer_func_t func
, void *args
, bool ptrace_syscall
)
1531 pid_t tracee
= getpid();
1533 /* Setup a pipe for clean synchronization. */
1534 ASSERT_EQ(0, pipe(pipefd
));
1536 /* Fork a child which we'll promote to tracer */
1537 tracer_pid
= fork();
1538 ASSERT_LE(0, tracer_pid
);
1539 signal(SIGALRM
, cont_handler
);
1540 if (tracer_pid
== 0) {
1542 start_tracer(_metadata
, pipefd
[1], tracee
, func
, args
,
1544 syscall(__NR_exit
, 0);
1547 prctl(PR_SET_PTRACER
, tracer_pid
, 0, 0, 0);
1548 read(pipefd
[0], &sync
, 1);
1554 void teardown_trace_fixture(struct __test_metadata
*_metadata
,
1560 * Extract the exit code from the other process and
1561 * adopt it for ourselves in case its asserts failed.
1563 ASSERT_EQ(0, kill(tracer
, SIGUSR1
));
1564 ASSERT_EQ(tracer
, waitpid(tracer
, &status
, 0));
1565 if (WEXITSTATUS(status
))
1566 _metadata
->passed
= 0;
1570 /* "poke" tracer arguments and function. */
1571 struct tracer_args_poke_t
{
1572 unsigned long poke_addr
;
1575 void tracer_poke(struct __test_metadata
*_metadata
, pid_t tracee
, int status
,
1580 struct tracer_args_poke_t
*info
= (struct tracer_args_poke_t
*)args
;
1582 ret
= ptrace(PTRACE_GETEVENTMSG
, tracee
, NULL
, &msg
);
1584 /* If this fails, don't try to recover. */
1585 ASSERT_EQ(0x1001, msg
) {
1586 kill(tracee
, SIGKILL
);
1589 * Poke in the message.
1590 * Registers are not touched to try to keep this relatively arch
1593 ret
= ptrace(PTRACE_POKEDATA
, tracee
, info
->poke_addr
, 0x1001);
1597 FIXTURE(TRACE_poke
) {
1598 struct sock_fprog prog
;
1601 struct tracer_args_poke_t tracer_args
;
1604 FIXTURE_SETUP(TRACE_poke
)
1606 struct sock_filter filter
[] = {
1607 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1608 offsetof(struct seccomp_data
, nr
)),
1609 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_read
, 0, 1),
1610 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
| 0x1001),
1611 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1615 memset(&self
->prog
, 0, sizeof(self
->prog
));
1616 self
->prog
.filter
= malloc(sizeof(filter
));
1617 ASSERT_NE(NULL
, self
->prog
.filter
);
1618 memcpy(self
->prog
.filter
, filter
, sizeof(filter
));
1619 self
->prog
.len
= (unsigned short)ARRAY_SIZE(filter
);
1621 /* Set up tracer args. */
1622 self
->tracer_args
.poke_addr
= (unsigned long)&self
->poked
;
1624 /* Launch tracer. */
1625 self
->tracer
= setup_trace_fixture(_metadata
, tracer_poke
,
1626 &self
->tracer_args
, false);
1629 FIXTURE_TEARDOWN(TRACE_poke
)
1631 teardown_trace_fixture(_metadata
, self
->tracer
);
1632 if (self
->prog
.filter
)
1633 free(self
->prog
.filter
);
1636 TEST_F(TRACE_poke
, read_has_side_effects
)
1640 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1643 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->prog
, 0, 0);
1646 EXPECT_EQ(0, self
->poked
);
1647 ret
= read(-1, NULL
, 0);
1649 EXPECT_EQ(0x1001, self
->poked
);
1652 TEST_F(TRACE_poke
, getpid_runs_normally
)
1656 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1659 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &self
->prog
, 0, 0);
1662 EXPECT_EQ(0, self
->poked
);
1663 EXPECT_NE(0, syscall(__NR_getpid
));
1664 EXPECT_EQ(0, self
->poked
);
1667 #if defined(__x86_64__)
1668 # define ARCH_REGS struct user_regs_struct
1669 # define SYSCALL_NUM orig_rax
1670 # define SYSCALL_RET rax
1671 #elif defined(__i386__)
1672 # define ARCH_REGS struct user_regs_struct
1673 # define SYSCALL_NUM orig_eax
1674 # define SYSCALL_RET eax
1675 #elif defined(__arm__)
1676 # define ARCH_REGS struct pt_regs
1677 # define SYSCALL_NUM ARM_r7
1678 # define SYSCALL_RET ARM_r0
1679 #elif defined(__aarch64__)
1680 # define ARCH_REGS struct user_pt_regs
1681 # define SYSCALL_NUM regs[8]
1682 # define SYSCALL_RET regs[0]
1683 #elif defined(__riscv) && __riscv_xlen == 64
1684 # define ARCH_REGS struct user_regs_struct
1685 # define SYSCALL_NUM a7
1686 # define SYSCALL_RET a0
1687 #elif defined(__csky__)
1688 # define ARCH_REGS struct pt_regs
1689 #if defined(__CSKYABIV2__)
1690 # define SYSCALL_NUM regs[3]
1692 # define SYSCALL_NUM regs[9]
1694 # define SYSCALL_RET a0
1695 #elif defined(__hppa__)
1696 # define ARCH_REGS struct user_regs_struct
1697 # define SYSCALL_NUM gr[20]
1698 # define SYSCALL_RET gr[28]
1699 #elif defined(__powerpc__)
1700 # define ARCH_REGS struct pt_regs
1701 # define SYSCALL_NUM gpr[0]
1702 # define SYSCALL_RET gpr[3]
1703 #elif defined(__s390__)
1704 # define ARCH_REGS s390_regs
1705 # define SYSCALL_NUM gprs[2]
1706 # define SYSCALL_RET gprs[2]
1707 # define SYSCALL_NUM_RET_SHARE_REG
1708 #elif defined(__mips__)
1709 # define ARCH_REGS struct pt_regs
1710 # define SYSCALL_NUM regs[2]
1711 # define SYSCALL_SYSCALL_NUM regs[4]
1712 # define SYSCALL_RET regs[2]
1713 # define SYSCALL_NUM_RET_SHARE_REG
1714 #elif defined(__xtensa__)
1715 # define ARCH_REGS struct user_pt_regs
1716 # define SYSCALL_NUM syscall
1718 * On xtensa syscall return value is in the register
1719 * a2 of the current window which is not fixed.
1721 #define SYSCALL_RET(reg) a[(reg).windowbase * 4 + 2]
1723 # error "Do not know how to find your architecture's registers and syscalls"
1726 /* When the syscall return can't be changed, stub out the tests for it. */
1727 #ifdef SYSCALL_NUM_RET_SHARE_REG
1728 # define EXPECT_SYSCALL_RETURN(val, action) EXPECT_EQ(-1, action)
1730 # define EXPECT_SYSCALL_RETURN(val, action) \
1734 EXPECT_EQ(-1, action); \
1735 EXPECT_EQ(-(val), errno); \
1737 EXPECT_EQ(val, action); \
1742 /* Use PTRACE_GETREGS and PTRACE_SETREGS when available. This is useful for
1743 * architectures without HAVE_ARCH_TRACEHOOK (e.g. User-mode Linux).
1745 #if defined(__x86_64__) || defined(__i386__) || defined(__mips__)
1746 #define HAVE_GETREGS
1749 /* Architecture-specific syscall fetching routine. */
1750 int get_syscall(struct __test_metadata
*_metadata
, pid_t tracee
)
1754 EXPECT_EQ(0, ptrace(PTRACE_GETREGS
, tracee
, 0, ®s
)) {
1755 TH_LOG("PTRACE_GETREGS failed");
1761 iov
.iov_base
= ®s
;
1762 iov
.iov_len
= sizeof(regs
);
1763 EXPECT_EQ(0, ptrace(PTRACE_GETREGSET
, tracee
, NT_PRSTATUS
, &iov
)) {
1764 TH_LOG("PTRACE_GETREGSET failed");
1769 #if defined(__mips__)
1770 if (regs
.SYSCALL_NUM
== __NR_O32_Linux
)
1771 return regs
.SYSCALL_SYSCALL_NUM
;
1773 return regs
.SYSCALL_NUM
;
1776 /* Architecture-specific syscall changing routine. */
1777 void change_syscall(struct __test_metadata
*_metadata
,
1778 pid_t tracee
, int syscall
, int result
)
1783 ret
= ptrace(PTRACE_GETREGS
, tracee
, 0, ®s
);
1786 iov
.iov_base
= ®s
;
1787 iov
.iov_len
= sizeof(regs
);
1788 ret
= ptrace(PTRACE_GETREGSET
, tracee
, NT_PRSTATUS
, &iov
);
1790 EXPECT_EQ(0, ret
) {}
1792 #if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \
1793 defined(__s390__) || defined(__hppa__) || defined(__riscv) || \
1794 defined(__xtensa__) || defined(__csky__)
1796 regs
.SYSCALL_NUM
= syscall
;
1798 #elif defined(__mips__)
1800 if (regs
.SYSCALL_NUM
== __NR_O32_Linux
)
1801 regs
.SYSCALL_SYSCALL_NUM
= syscall
;
1803 regs
.SYSCALL_NUM
= syscall
;
1806 #elif defined(__arm__)
1807 # ifndef PTRACE_SET_SYSCALL
1808 # define PTRACE_SET_SYSCALL 23
1811 ret
= ptrace(PTRACE_SET_SYSCALL
, tracee
, NULL
, syscall
);
1815 #elif defined(__aarch64__)
1816 # ifndef NT_ARM_SYSTEM_CALL
1817 # define NT_ARM_SYSTEM_CALL 0x404
1820 iov
.iov_base
= &syscall
;
1821 iov
.iov_len
= sizeof(syscall
);
1822 ret
= ptrace(PTRACE_SETREGSET
, tracee
, NT_ARM_SYSTEM_CALL
,
1829 TH_LOG("How is the syscall changed on this architecture?");
1833 /* If syscall is skipped, change return value. */
1835 #ifdef SYSCALL_NUM_RET_SHARE_REG
1836 TH_LOG("Can't modify syscall return on this architecture");
1838 #elif defined(__xtensa__)
1839 regs
.SYSCALL_RET(regs
) = result
;
1841 regs
.SYSCALL_RET
= result
;
1845 ret
= ptrace(PTRACE_SETREGS
, tracee
, 0, ®s
);
1847 iov
.iov_base
= ®s
;
1848 iov
.iov_len
= sizeof(regs
);
1849 ret
= ptrace(PTRACE_SETREGSET
, tracee
, NT_PRSTATUS
, &iov
);
1854 void tracer_seccomp(struct __test_metadata
*_metadata
, pid_t tracee
,
1855 int status
, void *args
)
1860 /* Make sure we got the right message. */
1861 ret
= ptrace(PTRACE_GETEVENTMSG
, tracee
, NULL
, &msg
);
1864 /* Validate and take action on expected syscalls. */
1867 /* change getpid to getppid. */
1868 EXPECT_EQ(__NR_getpid
, get_syscall(_metadata
, tracee
));
1869 change_syscall(_metadata
, tracee
, __NR_getppid
, 0);
1872 /* skip gettid with valid return code. */
1873 EXPECT_EQ(__NR_gettid
, get_syscall(_metadata
, tracee
));
1874 change_syscall(_metadata
, tracee
, -1, 45000);
1877 /* skip openat with error. */
1878 EXPECT_EQ(__NR_openat
, get_syscall(_metadata
, tracee
));
1879 change_syscall(_metadata
, tracee
, -1, -ESRCH
);
1882 /* do nothing (allow getppid) */
1883 EXPECT_EQ(__NR_getppid
, get_syscall(_metadata
, tracee
));
1887 TH_LOG("Unknown PTRACE_GETEVENTMSG: 0x%lx", msg
);
1888 kill(tracee
, SIGKILL
);
1894 void tracer_ptrace(struct __test_metadata
*_metadata
, pid_t tracee
,
1895 int status
, void *args
)
1902 * The traditional way to tell PTRACE_SYSCALL entry/exit
1907 /* Make sure we got an appropriate message. */
1908 ret
= ptrace(PTRACE_GETEVENTMSG
, tracee
, NULL
, &msg
);
1910 EXPECT_EQ(entry
? PTRACE_EVENTMSG_SYSCALL_ENTRY
1911 : PTRACE_EVENTMSG_SYSCALL_EXIT
, msg
);
1916 nr
= get_syscall(_metadata
, tracee
);
1918 if (nr
== __NR_getpid
)
1919 change_syscall(_metadata
, tracee
, __NR_getppid
, 0);
1920 if (nr
== __NR_gettid
)
1921 change_syscall(_metadata
, tracee
, -1, 45000);
1922 if (nr
== __NR_openat
)
1923 change_syscall(_metadata
, tracee
, -1, -ESRCH
);
1926 FIXTURE(TRACE_syscall
) {
1927 struct sock_fprog prog
;
1928 pid_t tracer
, mytid
, mypid
, parent
;
1931 FIXTURE_VARIANT(TRACE_syscall
) {
1933 * All of the SECCOMP_RET_TRACE behaviors can be tested with either
1934 * SECCOMP_RET_TRACE+PTRACE_CONT or plain ptrace()+PTRACE_SYSCALL.
1935 * This indicates if we should use SECCOMP_RET_TRACE (false), or
1941 FIXTURE_VARIANT_ADD(TRACE_syscall
, ptrace
) {
1945 FIXTURE_VARIANT_ADD(TRACE_syscall
, seccomp
) {
1946 .use_ptrace
= false,
1949 FIXTURE_SETUP(TRACE_syscall
)
1951 struct sock_filter filter
[] = {
1952 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
1953 offsetof(struct seccomp_data
, nr
)),
1954 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 0, 1),
1955 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
| 0x1002),
1956 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_gettid
, 0, 1),
1957 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
| 0x1003),
1958 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_openat
, 0, 1),
1959 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
| 0x1004),
1960 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getppid
, 0, 1),
1961 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
| 0x1005),
1962 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
1964 struct sock_fprog prog
= {
1965 .len
= (unsigned short)ARRAY_SIZE(filter
),
1970 /* Prepare some testable syscall results. */
1971 self
->mytid
= syscall(__NR_gettid
);
1972 ASSERT_GT(self
->mytid
, 0);
1973 ASSERT_NE(self
->mytid
, 1) {
1974 TH_LOG("Running this test as init is not supported. :)");
1977 self
->mypid
= getpid();
1978 ASSERT_GT(self
->mypid
, 0);
1979 ASSERT_EQ(self
->mytid
, self
->mypid
);
1981 self
->parent
= getppid();
1982 ASSERT_GT(self
->parent
, 0);
1983 ASSERT_NE(self
->parent
, self
->mypid
);
1985 /* Launch tracer. */
1986 self
->tracer
= setup_trace_fixture(_metadata
,
1987 variant
->use_ptrace
? tracer_ptrace
1989 NULL
, variant
->use_ptrace
);
1991 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
1994 if (variant
->use_ptrace
)
1997 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
2001 FIXTURE_TEARDOWN(TRACE_syscall
)
2003 teardown_trace_fixture(_metadata
, self
->tracer
);
2006 TEST(negative_ENOSYS
)
2009 * There should be no difference between an "internal" skip
2010 * and userspace asking for syscall "-1".
2013 EXPECT_EQ(-1, syscall(-1));
2014 EXPECT_EQ(errno
, ENOSYS
);
2015 /* And no difference for "still not valid but not -1". */
2017 EXPECT_EQ(-1, syscall(-101));
2018 EXPECT_EQ(errno
, ENOSYS
);
2021 TEST_F(TRACE_syscall
, negative_ENOSYS
)
2023 negative_ENOSYS(_metadata
);
2026 TEST_F(TRACE_syscall
, syscall_allowed
)
2028 /* getppid works as expected (no changes). */
2029 EXPECT_EQ(self
->parent
, syscall(__NR_getppid
));
2030 EXPECT_NE(self
->mypid
, syscall(__NR_getppid
));
2033 TEST_F(TRACE_syscall
, syscall_redirected
)
2035 /* getpid has been redirected to getppid as expected. */
2036 EXPECT_EQ(self
->parent
, syscall(__NR_getpid
));
2037 EXPECT_NE(self
->mypid
, syscall(__NR_getpid
));
2040 TEST_F(TRACE_syscall
, syscall_errno
)
2042 /* Tracer should skip the open syscall, resulting in ESRCH. */
2043 EXPECT_SYSCALL_RETURN(-ESRCH
, syscall(__NR_openat
));
2046 TEST_F(TRACE_syscall
, syscall_faked
)
2048 /* Tracer skips the gettid syscall and store altered return value. */
2049 EXPECT_SYSCALL_RETURN(45000, syscall(__NR_gettid
));
2052 TEST_F(TRACE_syscall
, skip_after
)
2054 struct sock_filter filter
[] = {
2055 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2056 offsetof(struct seccomp_data
, nr
)),
2057 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getppid
, 0, 1),
2058 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ERRNO
| EPERM
),
2059 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2061 struct sock_fprog prog
= {
2062 .len
= (unsigned short)ARRAY_SIZE(filter
),
2067 /* Install additional "errno on getppid" filter. */
2068 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
2071 /* Tracer will redirect getpid to getppid, and we should see EPERM. */
2073 EXPECT_EQ(-1, syscall(__NR_getpid
));
2074 EXPECT_EQ(EPERM
, errno
);
2077 TEST_F_SIGNAL(TRACE_syscall
, kill_after
, SIGSYS
)
2079 struct sock_filter filter
[] = {
2080 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2081 offsetof(struct seccomp_data
, nr
)),
2082 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getppid
, 0, 1),
2083 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
2084 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2086 struct sock_fprog prog
= {
2087 .len
= (unsigned short)ARRAY_SIZE(filter
),
2092 /* Install additional "death on getppid" filter. */
2093 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
2096 /* Tracer will redirect getpid to getppid, and we should die. */
2097 EXPECT_NE(self
->mypid
, syscall(__NR_getpid
));
2100 TEST(seccomp_syscall
)
2102 struct sock_filter filter
[] = {
2103 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2105 struct sock_fprog prog
= {
2106 .len
= (unsigned short)ARRAY_SIZE(filter
),
2111 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
2113 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2116 /* Reject insane operation. */
2117 ret
= seccomp(-1, 0, &prog
);
2118 ASSERT_NE(ENOSYS
, errno
) {
2119 TH_LOG("Kernel does not support seccomp syscall!");
2121 EXPECT_EQ(EINVAL
, errno
) {
2122 TH_LOG("Did not reject crazy op value!");
2125 /* Reject strict with flags or pointer. */
2126 ret
= seccomp(SECCOMP_SET_MODE_STRICT
, -1, NULL
);
2127 EXPECT_EQ(EINVAL
, errno
) {
2128 TH_LOG("Did not reject mode strict with flags!");
2130 ret
= seccomp(SECCOMP_SET_MODE_STRICT
, 0, &prog
);
2131 EXPECT_EQ(EINVAL
, errno
) {
2132 TH_LOG("Did not reject mode strict with uargs!");
2135 /* Reject insane args for filter. */
2136 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, -1, &prog
);
2137 EXPECT_EQ(EINVAL
, errno
) {
2138 TH_LOG("Did not reject crazy filter flags!");
2140 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, NULL
);
2141 EXPECT_EQ(EFAULT
, errno
) {
2142 TH_LOG("Did not reject NULL filter!");
2145 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
);
2146 EXPECT_EQ(0, errno
) {
2147 TH_LOG("Kernel does not support SECCOMP_SET_MODE_FILTER: %s",
2152 TEST(seccomp_syscall_mode_lock
)
2154 struct sock_filter filter
[] = {
2155 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2157 struct sock_fprog prog
= {
2158 .len
= (unsigned short)ARRAY_SIZE(filter
),
2163 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, NULL
, 0, 0);
2165 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2168 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
);
2169 ASSERT_NE(ENOSYS
, errno
) {
2170 TH_LOG("Kernel does not support seccomp syscall!");
2173 TH_LOG("Could not install filter!");
2176 /* Make sure neither entry point will switch to strict. */
2177 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_STRICT
, 0, 0, 0);
2178 EXPECT_EQ(EINVAL
, errno
) {
2179 TH_LOG("Switched to mode strict!");
2182 ret
= seccomp(SECCOMP_SET_MODE_STRICT
, 0, NULL
);
2183 EXPECT_EQ(EINVAL
, errno
) {
2184 TH_LOG("Switched to mode strict!");
2189 * Test detection of known and unknown filter flags. Userspace needs to be able
2190 * to check if a filter flag is supported by the current kernel and a good way
2191 * of doing that is by attempting to enter filter mode, with the flag bit in
2192 * question set, and a NULL pointer for the _args_ parameter. EFAULT indicates
2193 * that the flag is valid and EINVAL indicates that the flag is invalid.
2195 TEST(detect_seccomp_filter_flags
)
2197 unsigned int flags
[] = { SECCOMP_FILTER_FLAG_TSYNC
,
2198 SECCOMP_FILTER_FLAG_LOG
,
2199 SECCOMP_FILTER_FLAG_SPEC_ALLOW
,
2200 SECCOMP_FILTER_FLAG_NEW_LISTENER
,
2201 SECCOMP_FILTER_FLAG_TSYNC_ESRCH
};
2202 unsigned int exclusive
[] = {
2203 SECCOMP_FILTER_FLAG_TSYNC
,
2204 SECCOMP_FILTER_FLAG_NEW_LISTENER
};
2205 unsigned int flag
, all_flags
, exclusive_mask
;
2209 /* Test detection of individual known-good filter flags */
2210 for (i
= 0, all_flags
= 0; i
< ARRAY_SIZE(flags
); i
++) {
2214 /* Make sure the flag is a single bit! */
2223 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, flag
, NULL
);
2224 ASSERT_NE(ENOSYS
, errno
) {
2225 TH_LOG("Kernel does not support seccomp syscall!");
2228 EXPECT_EQ(EFAULT
, errno
) {
2229 TH_LOG("Failed to detect that a known-good filter flag (0x%X) is supported!",
2237 * Test detection of all known-good filter flags combined. But
2238 * for the exclusive flags we need to mask them out and try them
2239 * individually for the "all flags" testing.
2242 for (i
= 0; i
< ARRAY_SIZE(exclusive
); i
++)
2243 exclusive_mask
|= exclusive
[i
];
2244 for (i
= 0; i
< ARRAY_SIZE(exclusive
); i
++) {
2245 flag
= all_flags
& ~exclusive_mask
;
2246 flag
|= exclusive
[i
];
2248 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, flag
, NULL
);
2250 EXPECT_EQ(EFAULT
, errno
) {
2251 TH_LOG("Failed to detect that all known-good filter flags (0x%X) are supported!",
2256 /* Test detection of an unknown filter flags, without exclusives. */
2258 flag
&= ~exclusive_mask
;
2259 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, flag
, NULL
);
2261 EXPECT_EQ(EINVAL
, errno
) {
2262 TH_LOG("Failed to detect that an unknown filter flag (0x%X) is unsupported!",
2267 * Test detection of an unknown filter flag that may simply need to be
2268 * added to this test
2270 flag
= flags
[ARRAY_SIZE(flags
) - 1] << 1;
2271 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, flag
, NULL
);
2273 EXPECT_EQ(EINVAL
, errno
) {
2274 TH_LOG("Failed to detect that an unknown filter flag (0x%X) is unsupported! Does a new flag need to be added to this test?",
2281 struct sock_filter filter
[] = {
2282 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2284 struct sock_fprog prog
= {
2285 .len
= (unsigned short)ARRAY_SIZE(filter
),
2290 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, NULL
, 0, 0);
2292 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2295 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2297 ASSERT_NE(ENOSYS
, errno
) {
2298 TH_LOG("Kernel does not support seccomp syscall!");
2301 TH_LOG("Could not install initial filter with TSYNC!");
2305 #define TSYNC_SIBLINGS 2
2306 struct tsync_sibling
{
2310 pthread_cond_t
*cond
;
2311 pthread_mutex_t
*mutex
;
2314 struct sock_fprog
*prog
;
2315 struct __test_metadata
*metadata
;
2319 * To avoid joining joined threads (which is not allowed by Bionic),
2320 * make sure we both successfully join and clear the tid to skip a
2321 * later join attempt during fixture teardown. Any remaining threads
2322 * will be directly killed during teardown.
2324 #define PTHREAD_JOIN(tid, status) \
2326 int _rc = pthread_join(tid, status); \
2328 TH_LOG("pthread_join of tid %u failed: %d\n", \
2329 (unsigned int)tid, _rc); \
2336 struct sock_fprog root_prog
, apply_prog
;
2337 struct tsync_sibling sibling
[TSYNC_SIBLINGS
];
2339 pthread_cond_t cond
;
2340 pthread_mutex_t mutex
;
2344 FIXTURE_SETUP(TSYNC
)
2346 struct sock_filter root_filter
[] = {
2347 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2349 struct sock_filter apply_filter
[] = {
2350 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2351 offsetof(struct seccomp_data
, nr
)),
2352 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_read
, 0, 1),
2353 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
2354 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2357 memset(&self
->root_prog
, 0, sizeof(self
->root_prog
));
2358 memset(&self
->apply_prog
, 0, sizeof(self
->apply_prog
));
2359 memset(&self
->sibling
, 0, sizeof(self
->sibling
));
2360 self
->root_prog
.filter
= malloc(sizeof(root_filter
));
2361 ASSERT_NE(NULL
, self
->root_prog
.filter
);
2362 memcpy(self
->root_prog
.filter
, &root_filter
, sizeof(root_filter
));
2363 self
->root_prog
.len
= (unsigned short)ARRAY_SIZE(root_filter
);
2365 self
->apply_prog
.filter
= malloc(sizeof(apply_filter
));
2366 ASSERT_NE(NULL
, self
->apply_prog
.filter
);
2367 memcpy(self
->apply_prog
.filter
, &apply_filter
, sizeof(apply_filter
));
2368 self
->apply_prog
.len
= (unsigned short)ARRAY_SIZE(apply_filter
);
2370 self
->sibling_count
= 0;
2371 pthread_mutex_init(&self
->mutex
, NULL
);
2372 pthread_cond_init(&self
->cond
, NULL
);
2373 sem_init(&self
->started
, 0, 0);
2374 self
->sibling
[0].tid
= 0;
2375 self
->sibling
[0].cond
= &self
->cond
;
2376 self
->sibling
[0].started
= &self
->started
;
2377 self
->sibling
[0].mutex
= &self
->mutex
;
2378 self
->sibling
[0].diverge
= 0;
2379 self
->sibling
[0].num_waits
= 1;
2380 self
->sibling
[0].prog
= &self
->root_prog
;
2381 self
->sibling
[0].metadata
= _metadata
;
2382 self
->sibling
[1].tid
= 0;
2383 self
->sibling
[1].cond
= &self
->cond
;
2384 self
->sibling
[1].started
= &self
->started
;
2385 self
->sibling
[1].mutex
= &self
->mutex
;
2386 self
->sibling
[1].diverge
= 0;
2387 self
->sibling
[1].prog
= &self
->root_prog
;
2388 self
->sibling
[1].num_waits
= 1;
2389 self
->sibling
[1].metadata
= _metadata
;
2392 FIXTURE_TEARDOWN(TSYNC
)
2396 if (self
->root_prog
.filter
)
2397 free(self
->root_prog
.filter
);
2398 if (self
->apply_prog
.filter
)
2399 free(self
->apply_prog
.filter
);
2401 for ( ; sib
< self
->sibling_count
; ++sib
) {
2402 struct tsync_sibling
*s
= &self
->sibling
[sib
];
2407 * If a thread is still running, it may be stuck, so hit
2408 * it over the head really hard.
2410 pthread_kill(s
->tid
, 9);
2412 pthread_mutex_destroy(&self
->mutex
);
2413 pthread_cond_destroy(&self
->cond
);
2414 sem_destroy(&self
->started
);
2417 void *tsync_sibling(void *data
)
2420 struct tsync_sibling
*me
= data
;
2422 me
->system_tid
= syscall(__NR_gettid
);
2424 pthread_mutex_lock(me
->mutex
);
2426 /* Just re-apply the root prog to fork the tree */
2427 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
,
2430 sem_post(me
->started
);
2431 /* Return outside of started so parent notices failures. */
2433 pthread_mutex_unlock(me
->mutex
);
2434 return (void *)SIBLING_EXIT_FAILURE
;
2437 pthread_cond_wait(me
->cond
, me
->mutex
);
2438 me
->num_waits
= me
->num_waits
- 1;
2439 } while (me
->num_waits
);
2440 pthread_mutex_unlock(me
->mutex
);
2442 ret
= prctl(PR_GET_NO_NEW_PRIVS
, 0, 0, 0, 0);
2444 return (void *)SIBLING_EXIT_NEWPRIVS
;
2446 return (void *)SIBLING_EXIT_UNKILLED
;
2449 void tsync_start_sibling(struct tsync_sibling
*sibling
)
2451 pthread_create(&sibling
->tid
, NULL
, tsync_sibling
, (void *)sibling
);
2454 TEST_F(TSYNC
, siblings_fail_prctl
)
2458 struct sock_filter filter
[] = {
2459 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2460 offsetof(struct seccomp_data
, nr
)),
2461 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_prctl
, 0, 1),
2462 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ERRNO
| EINVAL
),
2463 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2465 struct sock_fprog prog
= {
2466 .len
= (unsigned short)ARRAY_SIZE(filter
),
2470 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2471 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2474 /* Check prctl failure detection by requesting sib 0 diverge. */
2475 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
);
2476 ASSERT_NE(ENOSYS
, errno
) {
2477 TH_LOG("Kernel does not support seccomp syscall!");
2480 TH_LOG("setting filter failed");
2483 self
->sibling
[0].diverge
= 1;
2484 tsync_start_sibling(&self
->sibling
[0]);
2485 tsync_start_sibling(&self
->sibling
[1]);
2487 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2488 sem_wait(&self
->started
);
2489 self
->sibling_count
++;
2492 /* Signal the threads to clean up*/
2493 pthread_mutex_lock(&self
->mutex
);
2494 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2495 TH_LOG("cond broadcast non-zero");
2497 pthread_mutex_unlock(&self
->mutex
);
2499 /* Ensure diverging sibling failed to call prctl. */
2500 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2501 EXPECT_EQ(SIBLING_EXIT_FAILURE
, (long)status
);
2502 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2503 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2506 TEST_F(TSYNC
, two_siblings_with_ancestor
)
2511 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2512 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2515 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &self
->root_prog
);
2516 ASSERT_NE(ENOSYS
, errno
) {
2517 TH_LOG("Kernel does not support seccomp syscall!");
2520 TH_LOG("Kernel does not support SECCOMP_SET_MODE_FILTER!");
2522 tsync_start_sibling(&self
->sibling
[0]);
2523 tsync_start_sibling(&self
->sibling
[1]);
2525 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2526 sem_wait(&self
->started
);
2527 self
->sibling_count
++;
2530 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2533 TH_LOG("Could install filter on all threads!");
2535 /* Tell the siblings to test the policy */
2536 pthread_mutex_lock(&self
->mutex
);
2537 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2538 TH_LOG("cond broadcast non-zero");
2540 pthread_mutex_unlock(&self
->mutex
);
2541 /* Ensure they are both killed and don't exit cleanly. */
2542 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2543 EXPECT_EQ(0x0, (long)status
);
2544 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2545 EXPECT_EQ(0x0, (long)status
);
2548 TEST_F(TSYNC
, two_sibling_want_nnp
)
2552 /* start siblings before any prctl() operations */
2553 tsync_start_sibling(&self
->sibling
[0]);
2554 tsync_start_sibling(&self
->sibling
[1]);
2555 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2556 sem_wait(&self
->started
);
2557 self
->sibling_count
++;
2560 /* Tell the siblings to test no policy */
2561 pthread_mutex_lock(&self
->mutex
);
2562 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2563 TH_LOG("cond broadcast non-zero");
2565 pthread_mutex_unlock(&self
->mutex
);
2567 /* Ensure they are both upset about lacking nnp. */
2568 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2569 EXPECT_EQ(SIBLING_EXIT_NEWPRIVS
, (long)status
);
2570 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2571 EXPECT_EQ(SIBLING_EXIT_NEWPRIVS
, (long)status
);
2574 TEST_F(TSYNC
, two_siblings_with_no_filter
)
2579 /* start siblings before any prctl() operations */
2580 tsync_start_sibling(&self
->sibling
[0]);
2581 tsync_start_sibling(&self
->sibling
[1]);
2582 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2583 sem_wait(&self
->started
);
2584 self
->sibling_count
++;
2587 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2588 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2591 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2593 ASSERT_NE(ENOSYS
, errno
) {
2594 TH_LOG("Kernel does not support seccomp syscall!");
2597 TH_LOG("Could install filter on all threads!");
2600 /* Tell the siblings to test the policy */
2601 pthread_mutex_lock(&self
->mutex
);
2602 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2603 TH_LOG("cond broadcast non-zero");
2605 pthread_mutex_unlock(&self
->mutex
);
2607 /* Ensure they are both killed and don't exit cleanly. */
2608 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2609 EXPECT_EQ(0x0, (long)status
);
2610 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2611 EXPECT_EQ(0x0, (long)status
);
2614 TEST_F(TSYNC
, two_siblings_with_one_divergence
)
2619 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2620 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2623 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &self
->root_prog
);
2624 ASSERT_NE(ENOSYS
, errno
) {
2625 TH_LOG("Kernel does not support seccomp syscall!");
2628 TH_LOG("Kernel does not support SECCOMP_SET_MODE_FILTER!");
2630 self
->sibling
[0].diverge
= 1;
2631 tsync_start_sibling(&self
->sibling
[0]);
2632 tsync_start_sibling(&self
->sibling
[1]);
2634 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2635 sem_wait(&self
->started
);
2636 self
->sibling_count
++;
2639 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2641 ASSERT_EQ(self
->sibling
[0].system_tid
, ret
) {
2642 TH_LOG("Did not fail on diverged sibling.");
2645 /* Wake the threads */
2646 pthread_mutex_lock(&self
->mutex
);
2647 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2648 TH_LOG("cond broadcast non-zero");
2650 pthread_mutex_unlock(&self
->mutex
);
2652 /* Ensure they are both unkilled. */
2653 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2654 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2655 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2656 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2659 TEST_F(TSYNC
, two_siblings_with_one_divergence_no_tid_in_err
)
2664 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2665 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2668 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &self
->root_prog
);
2669 ASSERT_NE(ENOSYS
, errno
) {
2670 TH_LOG("Kernel does not support seccomp syscall!");
2673 TH_LOG("Kernel does not support SECCOMP_SET_MODE_FILTER!");
2675 self
->sibling
[0].diverge
= 1;
2676 tsync_start_sibling(&self
->sibling
[0]);
2677 tsync_start_sibling(&self
->sibling
[1]);
2679 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2680 sem_wait(&self
->started
);
2681 self
->sibling_count
++;
2684 flags
= SECCOMP_FILTER_FLAG_TSYNC
| \
2685 SECCOMP_FILTER_FLAG_TSYNC_ESRCH
;
2686 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, flags
, &self
->apply_prog
);
2687 ASSERT_EQ(ESRCH
, errno
) {
2688 TH_LOG("Did not return ESRCH for diverged sibling.");
2690 ASSERT_EQ(-1, ret
) {
2691 TH_LOG("Did not fail on diverged sibling.");
2694 /* Wake the threads */
2695 pthread_mutex_lock(&self
->mutex
);
2696 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2697 TH_LOG("cond broadcast non-zero");
2699 pthread_mutex_unlock(&self
->mutex
);
2701 /* Ensure they are both unkilled. */
2702 PTHREAD_JOIN(self
->sibling
[0].tid
, &status
);
2703 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2704 PTHREAD_JOIN(self
->sibling
[1].tid
, &status
);
2705 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2708 TEST_F(TSYNC
, two_siblings_not_under_filter
)
2712 struct timespec delay
= { .tv_nsec
= 100000000 };
2714 ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2715 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2719 * Sibling 0 will have its own seccomp policy
2720 * and Sibling 1 will not be under seccomp at
2721 * all. Sibling 1 will enter seccomp and 0
2722 * will cause failure.
2724 self
->sibling
[0].diverge
= 1;
2725 tsync_start_sibling(&self
->sibling
[0]);
2726 tsync_start_sibling(&self
->sibling
[1]);
2728 while (self
->sibling_count
< TSYNC_SIBLINGS
) {
2729 sem_wait(&self
->started
);
2730 self
->sibling_count
++;
2733 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &self
->root_prog
);
2734 ASSERT_NE(ENOSYS
, errno
) {
2735 TH_LOG("Kernel does not support seccomp syscall!");
2738 TH_LOG("Kernel does not support SECCOMP_SET_MODE_FILTER!");
2741 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2743 ASSERT_EQ(ret
, self
->sibling
[0].system_tid
) {
2744 TH_LOG("Did not fail on diverged sibling.");
2747 if (ret
== self
->sibling
[0].system_tid
)
2750 pthread_mutex_lock(&self
->mutex
);
2752 /* Increment the other siblings num_waits so we can clean up
2753 * the one we just saw.
2755 self
->sibling
[!sib
].num_waits
+= 1;
2757 /* Signal the thread to clean up*/
2758 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2759 TH_LOG("cond broadcast non-zero");
2761 pthread_mutex_unlock(&self
->mutex
);
2762 PTHREAD_JOIN(self
->sibling
[sib
].tid
, &status
);
2763 EXPECT_EQ(SIBLING_EXIT_UNKILLED
, (long)status
);
2764 /* Poll for actual task death. pthread_join doesn't guarantee it. */
2765 while (!kill(self
->sibling
[sib
].system_tid
, 0))
2766 nanosleep(&delay
, NULL
);
2767 /* Switch to the remaining sibling */
2770 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2773 TH_LOG("Expected the remaining sibling to sync");
2776 pthread_mutex_lock(&self
->mutex
);
2778 /* If remaining sibling didn't have a chance to wake up during
2779 * the first broadcast, manually reduce the num_waits now.
2781 if (self
->sibling
[sib
].num_waits
> 1)
2782 self
->sibling
[sib
].num_waits
= 1;
2783 ASSERT_EQ(0, pthread_cond_broadcast(&self
->cond
)) {
2784 TH_LOG("cond broadcast non-zero");
2786 pthread_mutex_unlock(&self
->mutex
);
2787 PTHREAD_JOIN(self
->sibling
[sib
].tid
, &status
);
2788 EXPECT_EQ(0, (long)status
);
2789 /* Poll for actual task death. pthread_join doesn't guarantee it. */
2790 while (!kill(self
->sibling
[sib
].system_tid
, 0))
2791 nanosleep(&delay
, NULL
);
2793 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_TSYNC
,
2795 ASSERT_EQ(0, ret
); /* just us chickens */
2798 /* Make sure restarted syscalls are seen directly as "restart_syscall". */
2799 TEST(syscall_restart
)
2806 siginfo_t info
= { };
2807 struct sock_filter filter
[] = {
2808 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2809 offsetof(struct seccomp_data
, nr
)),
2811 #ifdef __NR_sigreturn
2812 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_sigreturn
, 7, 0),
2814 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_read
, 6, 0),
2815 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_exit
, 5, 0),
2816 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_rt_sigreturn
, 4, 0),
2817 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_nanosleep
, 5, 0),
2818 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_clock_nanosleep
, 4, 0),
2819 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_restart_syscall
, 4, 0),
2821 /* Allow __NR_write for easy logging. */
2822 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_write
, 0, 1),
2823 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2824 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
2825 /* The nanosleep jump target. */
2826 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
|0x100),
2827 /* The restart_syscall jump target. */
2828 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_TRACE
|0x200),
2830 struct sock_fprog prog
= {
2831 .len
= (unsigned short)ARRAY_SIZE(filter
),
2834 #if defined(__arm__)
2835 struct utsname utsbuf
;
2838 ASSERT_EQ(0, pipe(pipefd
));
2841 ASSERT_LE(0, child_pid
);
2842 if (child_pid
== 0) {
2843 /* Child uses EXPECT not ASSERT to deliver status correctly. */
2845 struct timespec timeout
= { };
2847 /* Attach parent as tracer and stop. */
2848 EXPECT_EQ(0, ptrace(PTRACE_TRACEME
));
2849 EXPECT_EQ(0, raise(SIGSTOP
));
2851 EXPECT_EQ(0, close(pipefd
[1]));
2853 EXPECT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0)) {
2854 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
2857 ret
= prctl(PR_SET_SECCOMP
, SECCOMP_MODE_FILTER
, &prog
, 0, 0);
2859 TH_LOG("Failed to install filter!");
2862 EXPECT_EQ(1, read(pipefd
[0], &buf
, 1)) {
2863 TH_LOG("Failed to read() sync from parent");
2865 EXPECT_EQ('.', buf
) {
2866 TH_LOG("Failed to get sync data from read()");
2869 /* Start nanosleep to be interrupted. */
2872 EXPECT_EQ(0, nanosleep(&timeout
, NULL
)) {
2873 TH_LOG("Call to nanosleep() failed (errno %d)", errno
);
2876 /* Read final sync from parent. */
2877 EXPECT_EQ(1, read(pipefd
[0], &buf
, 1)) {
2878 TH_LOG("Failed final read() from parent");
2880 EXPECT_EQ('!', buf
) {
2881 TH_LOG("Failed to get final data from read()");
2884 /* Directly report the status of our test harness results. */
2885 syscall(__NR_exit
, _metadata
->passed
? EXIT_SUCCESS
2888 EXPECT_EQ(0, close(pipefd
[0]));
2890 /* Attach to child, setup options, and release. */
2891 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2892 ASSERT_EQ(true, WIFSTOPPED(status
));
2893 ASSERT_EQ(0, ptrace(PTRACE_SETOPTIONS
, child_pid
, NULL
,
2894 PTRACE_O_TRACESECCOMP
));
2895 ASSERT_EQ(0, ptrace(PTRACE_CONT
, child_pid
, NULL
, 0));
2896 ASSERT_EQ(1, write(pipefd
[1], ".", 1));
2898 /* Wait for nanosleep() to start. */
2899 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2900 ASSERT_EQ(true, WIFSTOPPED(status
));
2901 ASSERT_EQ(SIGTRAP
, WSTOPSIG(status
));
2902 ASSERT_EQ(PTRACE_EVENT_SECCOMP
, (status
>> 16));
2903 ASSERT_EQ(0, ptrace(PTRACE_GETEVENTMSG
, child_pid
, NULL
, &msg
));
2904 ASSERT_EQ(0x100, msg
);
2905 ret
= get_syscall(_metadata
, child_pid
);
2906 EXPECT_TRUE(ret
== __NR_nanosleep
|| ret
== __NR_clock_nanosleep
);
2908 /* Might as well check siginfo for sanity while we're here. */
2909 ASSERT_EQ(0, ptrace(PTRACE_GETSIGINFO
, child_pid
, NULL
, &info
));
2910 ASSERT_EQ(SIGTRAP
, info
.si_signo
);
2911 ASSERT_EQ(SIGTRAP
| (PTRACE_EVENT_SECCOMP
<< 8), info
.si_code
);
2912 EXPECT_EQ(0, info
.si_errno
);
2913 EXPECT_EQ(getuid(), info
.si_uid
);
2914 /* Verify signal delivery came from child (seccomp-triggered). */
2915 EXPECT_EQ(child_pid
, info
.si_pid
);
2917 /* Interrupt nanosleep with SIGSTOP (which we'll need to handle). */
2918 ASSERT_EQ(0, kill(child_pid
, SIGSTOP
));
2919 ASSERT_EQ(0, ptrace(PTRACE_CONT
, child_pid
, NULL
, 0));
2920 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2921 ASSERT_EQ(true, WIFSTOPPED(status
));
2922 ASSERT_EQ(SIGSTOP
, WSTOPSIG(status
));
2923 ASSERT_EQ(0, ptrace(PTRACE_GETSIGINFO
, child_pid
, NULL
, &info
));
2925 * There is no siginfo on SIGSTOP any more, so we can't verify
2926 * signal delivery came from parent now (getpid() == info.si_pid).
2927 * https://lkml.kernel.org/r/CAGXu5jJaZAOzP1qFz66tYrtbuywqb+UN2SOA1VLHpCCOiYvYeg@mail.gmail.com
2928 * At least verify the SIGSTOP via PTRACE_GETSIGINFO.
2930 EXPECT_EQ(SIGSTOP
, info
.si_signo
);
2932 /* Restart nanosleep with SIGCONT, which triggers restart_syscall. */
2933 ASSERT_EQ(0, kill(child_pid
, SIGCONT
));
2934 ASSERT_EQ(0, ptrace(PTRACE_CONT
, child_pid
, NULL
, 0));
2935 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2936 ASSERT_EQ(true, WIFSTOPPED(status
));
2937 ASSERT_EQ(SIGCONT
, WSTOPSIG(status
));
2938 ASSERT_EQ(0, ptrace(PTRACE_CONT
, child_pid
, NULL
, 0));
2940 /* Wait for restart_syscall() to start. */
2941 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2942 ASSERT_EQ(true, WIFSTOPPED(status
));
2943 ASSERT_EQ(SIGTRAP
, WSTOPSIG(status
));
2944 ASSERT_EQ(PTRACE_EVENT_SECCOMP
, (status
>> 16));
2945 ASSERT_EQ(0, ptrace(PTRACE_GETEVENTMSG
, child_pid
, NULL
, &msg
));
2947 ASSERT_EQ(0x200, msg
);
2948 ret
= get_syscall(_metadata
, child_pid
);
2949 #if defined(__arm__)
2952 * - native ARM registers do NOT expose true syscall.
2953 * - compat ARM registers on ARM64 DO expose true syscall.
2955 ASSERT_EQ(0, uname(&utsbuf
));
2956 if (strncmp(utsbuf
.machine
, "arm", 3) == 0) {
2957 EXPECT_EQ(__NR_nanosleep
, ret
);
2961 EXPECT_EQ(__NR_restart_syscall
, ret
);
2964 /* Write again to end test. */
2965 ASSERT_EQ(0, ptrace(PTRACE_CONT
, child_pid
, NULL
, 0));
2966 ASSERT_EQ(1, write(pipefd
[1], "!", 1));
2967 EXPECT_EQ(0, close(pipefd
[1]));
2969 ASSERT_EQ(child_pid
, waitpid(child_pid
, &status
, 0));
2970 if (WIFSIGNALED(status
) || WEXITSTATUS(status
))
2971 _metadata
->passed
= 0;
2974 TEST_SIGNAL(filter_flag_log
, SIGSYS
)
2976 struct sock_filter allow_filter
[] = {
2977 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2979 struct sock_filter kill_filter
[] = {
2980 BPF_STMT(BPF_LD
|BPF_W
|BPF_ABS
,
2981 offsetof(struct seccomp_data
, nr
)),
2982 BPF_JUMP(BPF_JMP
|BPF_JEQ
|BPF_K
, __NR_getpid
, 0, 1),
2983 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_KILL
),
2984 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
2986 struct sock_fprog allow_prog
= {
2987 .len
= (unsigned short)ARRAY_SIZE(allow_filter
),
2988 .filter
= allow_filter
,
2990 struct sock_fprog kill_prog
= {
2991 .len
= (unsigned short)ARRAY_SIZE(kill_filter
),
2992 .filter
= kill_filter
,
2995 pid_t parent
= getppid();
2997 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3000 /* Verify that the FILTER_FLAG_LOG flag isn't accepted in strict mode */
3001 ret
= seccomp(SECCOMP_SET_MODE_STRICT
, SECCOMP_FILTER_FLAG_LOG
,
3003 ASSERT_NE(ENOSYS
, errno
) {
3004 TH_LOG("Kernel does not support seccomp syscall!");
3007 TH_LOG("Kernel accepted FILTER_FLAG_LOG flag in strict mode!");
3009 EXPECT_EQ(EINVAL
, errno
) {
3010 TH_LOG("Kernel returned unexpected errno for FILTER_FLAG_LOG flag in strict mode!");
3013 /* Verify that a simple, permissive filter can be added with no flags */
3014 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, 0, &allow_prog
);
3017 /* See if the same filter can be added with the FILTER_FLAG_LOG flag */
3018 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_LOG
,
3020 ASSERT_NE(EINVAL
, errno
) {
3021 TH_LOG("Kernel does not support the FILTER_FLAG_LOG flag!");
3025 /* Ensure that the kill filter works with the FILTER_FLAG_LOG flag */
3026 ret
= seccomp(SECCOMP_SET_MODE_FILTER
, SECCOMP_FILTER_FLAG_LOG
,
3030 EXPECT_EQ(parent
, syscall(__NR_getppid
));
3031 /* getpid() should never return. */
3032 EXPECT_EQ(0, syscall(__NR_getpid
));
3035 TEST(get_action_avail
)
3037 __u32 actions
[] = { SECCOMP_RET_KILL_THREAD
, SECCOMP_RET_TRAP
,
3038 SECCOMP_RET_ERRNO
, SECCOMP_RET_TRACE
,
3039 SECCOMP_RET_LOG
, SECCOMP_RET_ALLOW
};
3040 __u32 unknown_action
= 0x10000000U
;
3044 ret
= seccomp(SECCOMP_GET_ACTION_AVAIL
, 0, &actions
[0]);
3045 ASSERT_NE(ENOSYS
, errno
) {
3046 TH_LOG("Kernel does not support seccomp syscall!");
3048 ASSERT_NE(EINVAL
, errno
) {
3049 TH_LOG("Kernel does not support SECCOMP_GET_ACTION_AVAIL operation!");
3053 for (i
= 0; i
< ARRAY_SIZE(actions
); i
++) {
3054 ret
= seccomp(SECCOMP_GET_ACTION_AVAIL
, 0, &actions
[i
]);
3056 TH_LOG("Expected action (0x%X) not available!",
3061 /* Check that an unknown action is handled properly (EOPNOTSUPP) */
3062 ret
= seccomp(SECCOMP_GET_ACTION_AVAIL
, 0, &unknown_action
);
3064 EXPECT_EQ(errno
, EOPNOTSUPP
);
3072 struct seccomp_metadata md
;
3075 /* Only real root can get metadata. */
3077 SKIP(return, "get_metadata requires real root");
3081 ASSERT_EQ(0, pipe(pipefd
));
3086 struct sock_filter filter
[] = {
3087 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
3089 struct sock_fprog prog
= {
3090 .len
= (unsigned short)ARRAY_SIZE(filter
),
3094 /* one with log, one without */
3095 EXPECT_EQ(0, seccomp(SECCOMP_SET_MODE_FILTER
,
3096 SECCOMP_FILTER_FLAG_LOG
, &prog
));
3097 EXPECT_EQ(0, seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
));
3099 EXPECT_EQ(0, close(pipefd
[0]));
3100 ASSERT_EQ(1, write(pipefd
[1], "1", 1));
3101 ASSERT_EQ(0, close(pipefd
[1]));
3107 ASSERT_EQ(0, close(pipefd
[1]));
3108 ASSERT_EQ(1, read(pipefd
[0], &buf
, 1));
3110 ASSERT_EQ(0, ptrace(PTRACE_ATTACH
, pid
));
3111 ASSERT_EQ(pid
, waitpid(pid
, NULL
, 0));
3113 /* Past here must not use ASSERT or child process is never killed. */
3117 ret
= ptrace(PTRACE_SECCOMP_GET_METADATA
, pid
, sizeof(md
), &md
);
3118 EXPECT_EQ(sizeof(md
), ret
) {
3119 if (errno
== EINVAL
)
3120 SKIP(goto skip
, "Kernel does not support PTRACE_SECCOMP_GET_METADATA (missing CONFIG_CHECKPOINT_RESTORE?)");
3123 EXPECT_EQ(md
.flags
, SECCOMP_FILTER_FLAG_LOG
);
3124 EXPECT_EQ(md
.filter_off
, 0);
3127 ret
= ptrace(PTRACE_SECCOMP_GET_METADATA
, pid
, sizeof(md
), &md
);
3128 EXPECT_EQ(sizeof(md
), ret
);
3129 EXPECT_EQ(md
.flags
, 0);
3130 EXPECT_EQ(md
.filter_off
, 1);
3133 ASSERT_EQ(0, kill(pid
, SIGKILL
));
3136 static int user_notif_syscall(int nr
, unsigned int flags
)
3138 struct sock_filter filter
[] = {
3139 BPF_STMT(BPF_LD
+BPF_W
+BPF_ABS
,
3140 offsetof(struct seccomp_data
, nr
)),
3141 BPF_JUMP(BPF_JMP
+BPF_JEQ
+BPF_K
, nr
, 0, 1),
3142 BPF_STMT(BPF_RET
+BPF_K
, SECCOMP_RET_USER_NOTIF
),
3143 BPF_STMT(BPF_RET
+BPF_K
, SECCOMP_RET_ALLOW
),
3146 struct sock_fprog prog
= {
3147 .len
= (unsigned short)ARRAY_SIZE(filter
),
3151 return seccomp(SECCOMP_SET_MODE_FILTER
, flags
, &prog
);
3154 #define USER_NOTIF_MAGIC INT_MAX
3155 TEST(user_notification_basic
)
3159 int status
, listener
;
3160 struct seccomp_notif req
= {};
3161 struct seccomp_notif_resp resp
= {};
3162 struct pollfd pollfd
;
3164 struct sock_filter filter
[] = {
3165 BPF_STMT(BPF_RET
|BPF_K
, SECCOMP_RET_ALLOW
),
3167 struct sock_fprog prog
= {
3168 .len
= (unsigned short)ARRAY_SIZE(filter
),
3172 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3174 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3180 /* Check that we get -ENOSYS with no listener attached */
3182 if (user_notif_syscall(__NR_getppid
, 0) < 0)
3184 ret
= syscall(__NR_getppid
);
3185 exit(ret
>= 0 || errno
!= ENOSYS
);
3188 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3189 EXPECT_EQ(true, WIFEXITED(status
));
3190 EXPECT_EQ(0, WEXITSTATUS(status
));
3192 /* Add some no-op filters for grins. */
3193 EXPECT_EQ(seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
), 0);
3194 EXPECT_EQ(seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
), 0);
3195 EXPECT_EQ(seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
), 0);
3196 EXPECT_EQ(seccomp(SECCOMP_SET_MODE_FILTER
, 0, &prog
), 0);
3198 /* Check that the basic notification machinery works */
3199 listener
= user_notif_syscall(__NR_getppid
,
3200 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3201 ASSERT_GE(listener
, 0);
3203 /* Installing a second listener in the chain should EBUSY */
3204 EXPECT_EQ(user_notif_syscall(__NR_getppid
,
3205 SECCOMP_FILTER_FLAG_NEW_LISTENER
),
3207 EXPECT_EQ(errno
, EBUSY
);
3213 ret
= syscall(__NR_getppid
);
3214 exit(ret
!= USER_NOTIF_MAGIC
);
3217 pollfd
.fd
= listener
;
3218 pollfd
.events
= POLLIN
| POLLOUT
;
3220 EXPECT_GT(poll(&pollfd
, 1, -1), 0);
3221 EXPECT_EQ(pollfd
.revents
, POLLIN
);
3223 /* Test that we can't pass garbage to the kernel. */
3224 memset(&req
, 0, sizeof(req
));
3227 ret
= ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
);
3229 EXPECT_EQ(EINVAL
, errno
);
3233 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3236 pollfd
.fd
= listener
;
3237 pollfd
.events
= POLLIN
| POLLOUT
;
3239 EXPECT_GT(poll(&pollfd
, 1, -1), 0);
3240 EXPECT_EQ(pollfd
.revents
, POLLOUT
);
3242 EXPECT_EQ(req
.data
.nr
, __NR_getppid
);
3246 resp
.val
= USER_NOTIF_MAGIC
;
3248 /* check that we make sure flags == 0 */
3250 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), -1);
3251 EXPECT_EQ(errno
, EINVAL
);
3254 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3256 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3257 EXPECT_EQ(true, WIFEXITED(status
));
3258 EXPECT_EQ(0, WEXITSTATUS(status
));
3261 TEST(user_notification_with_tsync
)
3266 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3268 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3271 /* these were exclusive */
3272 flags
= SECCOMP_FILTER_FLAG_NEW_LISTENER
|
3273 SECCOMP_FILTER_FLAG_TSYNC
;
3274 ASSERT_EQ(-1, user_notif_syscall(__NR_getppid
, flags
));
3275 ASSERT_EQ(EINVAL
, errno
);
3277 /* but now they're not */
3278 flags
|= SECCOMP_FILTER_FLAG_TSYNC_ESRCH
;
3279 ret
= user_notif_syscall(__NR_getppid
, flags
);
3284 TEST(user_notification_kill_in_middle
)
3289 struct seccomp_notif req
= {};
3290 struct seccomp_notif_resp resp
= {};
3292 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3294 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3297 listener
= user_notif_syscall(__NR_getppid
,
3298 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3299 ASSERT_GE(listener
, 0);
3302 * Check that nothing bad happens when we kill the task in the middle
3309 ret
= syscall(__NR_getppid
);
3310 exit(ret
!= USER_NOTIF_MAGIC
);
3313 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3314 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ID_VALID
, &req
.id
), 0);
3316 EXPECT_EQ(kill(pid
, SIGKILL
), 0);
3317 EXPECT_EQ(waitpid(pid
, NULL
, 0), pid
);
3319 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ID_VALID
, &req
.id
), -1);
3322 ret
= ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
);
3324 EXPECT_EQ(errno
, ENOENT
);
3327 static int handled
= -1;
3329 static void signal_handler(int signal
)
3331 if (write(handled
, "c", 1) != 1)
3332 perror("write from signal");
3335 TEST(user_notification_signal
)
3339 int status
, listener
, sk_pair
[2];
3340 struct seccomp_notif req
= {};
3341 struct seccomp_notif_resp resp
= {};
3344 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3346 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3349 ASSERT_EQ(socketpair(PF_LOCAL
, SOCK_SEQPACKET
, 0, sk_pair
), 0);
3351 listener
= user_notif_syscall(__NR_gettid
,
3352 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3353 ASSERT_GE(listener
, 0);
3360 handled
= sk_pair
[1];
3361 if (signal(SIGUSR1
, signal_handler
) == SIG_ERR
) {
3366 * ERESTARTSYS behavior is a bit hard to test, because we need
3367 * to rely on a signal that has not yet been handled. Let's at
3368 * least check that the error code gets propagated through, and
3369 * hope that it doesn't break when there is actually a signal :)
3371 ret
= syscall(__NR_gettid
);
3372 exit(!(ret
== -1 && errno
== 512));
3377 memset(&req
, 0, sizeof(req
));
3378 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3380 EXPECT_EQ(kill(pid
, SIGUSR1
), 0);
3383 * Make sure the signal really is delivered, which means we're not
3384 * stuck in the user notification code any more and the notification
3387 EXPECT_EQ(read(sk_pair
[0], &c
, 1), 1);
3390 resp
.error
= -EPERM
;
3393 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), -1);
3394 EXPECT_EQ(errno
, ENOENT
);
3396 memset(&req
, 0, sizeof(req
));
3397 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3400 resp
.error
= -512; /* -ERESTARTSYS */
3403 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3405 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3406 EXPECT_EQ(true, WIFEXITED(status
));
3407 EXPECT_EQ(0, WEXITSTATUS(status
));
3410 TEST(user_notification_closed_listener
)
3414 int status
, listener
;
3416 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3418 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3421 listener
= user_notif_syscall(__NR_getppid
,
3422 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3423 ASSERT_GE(listener
, 0);
3426 * Check that we get an ENOSYS when the listener is closed.
3432 ret
= syscall(__NR_getppid
);
3433 exit(ret
!= -1 && errno
!= ENOSYS
);
3438 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3439 EXPECT_EQ(true, WIFEXITED(status
));
3440 EXPECT_EQ(0, WEXITSTATUS(status
));
3444 * Check that a pid in a child namespace still shows up as valid in ours.
3446 TEST(user_notification_child_pid_ns
)
3449 int status
, listener
;
3450 struct seccomp_notif req
= {};
3451 struct seccomp_notif_resp resp
= {};
3453 ASSERT_EQ(unshare(CLONE_NEWUSER
| CLONE_NEWPID
), 0) {
3454 if (errno
== EINVAL
)
3455 SKIP(return, "kernel missing CLONE_NEWUSER support");
3458 listener
= user_notif_syscall(__NR_getppid
,
3459 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3460 ASSERT_GE(listener
, 0);
3466 exit(syscall(__NR_getppid
) != USER_NOTIF_MAGIC
);
3468 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3469 EXPECT_EQ(req
.pid
, pid
);
3473 resp
.val
= USER_NOTIF_MAGIC
;
3475 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3477 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3478 EXPECT_EQ(true, WIFEXITED(status
));
3479 EXPECT_EQ(0, WEXITSTATUS(status
));
3484 * Check that a pid in a sibling (i.e. unrelated) namespace shows up as 0, i.e.
3487 TEST(user_notification_sibling_pid_ns
)
3490 int status
, listener
;
3491 struct seccomp_notif req
= {};
3492 struct seccomp_notif_resp resp
= {};
3494 ASSERT_EQ(prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0), 0) {
3495 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3498 listener
= user_notif_syscall(__NR_getppid
,
3499 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3500 ASSERT_GE(listener
, 0);
3506 ASSERT_EQ(unshare(CLONE_NEWPID
), 0);
3512 exit(syscall(__NR_getppid
) != USER_NOTIF_MAGIC
);
3514 EXPECT_EQ(waitpid(pid2
, &status
, 0), pid2
);
3515 EXPECT_EQ(true, WIFEXITED(status
));
3516 EXPECT_EQ(0, WEXITSTATUS(status
));
3517 exit(WEXITSTATUS(status
));
3520 /* Create the sibling ns, and sibling in it. */
3521 ASSERT_EQ(unshare(CLONE_NEWPID
), 0) {
3523 SKIP(return, "CLONE_NEWPID requires CAP_SYS_ADMIN");
3525 ASSERT_EQ(errno
, 0);
3531 ASSERT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3533 * The pid should be 0, i.e. the task is in some namespace that
3536 EXPECT_EQ(req
.pid
, 0);
3540 resp
.val
= USER_NOTIF_MAGIC
;
3542 ASSERT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3548 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3549 EXPECT_EQ(true, WIFEXITED(status
));
3550 EXPECT_EQ(0, WEXITSTATUS(status
));
3552 EXPECT_EQ(waitpid(pid2
, &status
, 0), pid2
);
3553 EXPECT_EQ(true, WIFEXITED(status
));
3554 EXPECT_EQ(0, WEXITSTATUS(status
));
3557 TEST(user_notification_fault_recv
)
3560 int status
, listener
;
3561 struct seccomp_notif req
= {};
3562 struct seccomp_notif_resp resp
= {};
3564 ASSERT_EQ(unshare(CLONE_NEWUSER
), 0);
3566 listener
= user_notif_syscall(__NR_getppid
,
3567 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3568 ASSERT_GE(listener
, 0);
3574 exit(syscall(__NR_getppid
) != USER_NOTIF_MAGIC
);
3576 /* Do a bad recv() */
3577 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, NULL
), -1);
3578 EXPECT_EQ(errno
, EFAULT
);
3580 /* We should still be able to receive this notification, though. */
3581 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3582 EXPECT_EQ(req
.pid
, pid
);
3586 resp
.val
= USER_NOTIF_MAGIC
;
3588 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3590 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3591 EXPECT_EQ(true, WIFEXITED(status
));
3592 EXPECT_EQ(0, WEXITSTATUS(status
));
3595 TEST(seccomp_get_notif_sizes
)
3597 struct seccomp_notif_sizes sizes
;
3599 ASSERT_EQ(seccomp(SECCOMP_GET_NOTIF_SIZES
, 0, &sizes
), 0);
3600 EXPECT_EQ(sizes
.seccomp_notif
, sizeof(struct seccomp_notif
));
3601 EXPECT_EQ(sizes
.seccomp_notif_resp
, sizeof(struct seccomp_notif_resp
));
3604 TEST(user_notification_continue
)
3608 int status
, listener
;
3609 struct seccomp_notif req
= {};
3610 struct seccomp_notif_resp resp
= {};
3611 struct pollfd pollfd
;
3613 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3615 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3618 listener
= user_notif_syscall(__NR_dup
, SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3619 ASSERT_GE(listener
, 0);
3625 int dup_fd
, pipe_fds
[2];
3628 ASSERT_GE(pipe(pipe_fds
), 0);
3630 dup_fd
= dup(pipe_fds
[0]);
3631 ASSERT_GE(dup_fd
, 0);
3632 EXPECT_NE(pipe_fds
[0], dup_fd
);
3635 ASSERT_EQ(filecmp(self
, self
, pipe_fds
[0], dup_fd
), 0);
3639 pollfd
.fd
= listener
;
3640 pollfd
.events
= POLLIN
| POLLOUT
;
3642 EXPECT_GT(poll(&pollfd
, 1, -1), 0);
3643 EXPECT_EQ(pollfd
.revents
, POLLIN
);
3645 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3647 pollfd
.fd
= listener
;
3648 pollfd
.events
= POLLIN
| POLLOUT
;
3650 EXPECT_GT(poll(&pollfd
, 1, -1), 0);
3651 EXPECT_EQ(pollfd
.revents
, POLLOUT
);
3653 EXPECT_EQ(req
.data
.nr
, __NR_dup
);
3656 resp
.flags
= SECCOMP_USER_NOTIF_FLAG_CONTINUE
;
3659 * Verify that setting SECCOMP_USER_NOTIF_FLAG_CONTINUE enforces other
3663 resp
.val
= USER_NOTIF_MAGIC
;
3664 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), -1);
3665 EXPECT_EQ(errno
, EINVAL
);
3667 resp
.error
= USER_NOTIF_MAGIC
;
3669 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), -1);
3670 EXPECT_EQ(errno
, EINVAL
);
3674 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0) {
3675 if (errno
== EINVAL
)
3676 SKIP(goto skip
, "Kernel does not support SECCOMP_USER_NOTIF_FLAG_CONTINUE");
3680 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3681 EXPECT_EQ(true, WIFEXITED(status
));
3682 EXPECT_EQ(0, WEXITSTATUS(status
)) {
3683 if (WEXITSTATUS(status
) == 2) {
3684 SKIP(return, "Kernel does not support kcmp() syscall");
3690 TEST(user_notification_filter_empty
)
3695 struct pollfd pollfd
;
3696 struct clone_args args
= {
3697 .flags
= CLONE_FILES
,
3698 .exit_signal
= SIGCHLD
,
3701 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3703 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3706 pid
= sys_clone3(&args
, sizeof(args
));
3712 listener
= user_notif_syscall(__NR_mknod
, SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3714 _exit(EXIT_FAILURE
);
3716 if (dup2(listener
, 200) != 200)
3717 _exit(EXIT_FAILURE
);
3721 _exit(EXIT_SUCCESS
);
3724 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3725 EXPECT_EQ(true, WIFEXITED(status
));
3726 EXPECT_EQ(0, WEXITSTATUS(status
));
3729 * The seccomp filter has become unused so we should be notified once
3730 * the kernel gets around to cleaning up task struct.
3733 pollfd
.events
= POLLHUP
;
3735 EXPECT_GT(poll(&pollfd
, 1, 2000), 0);
3736 EXPECT_GT((pollfd
.revents
& POLLHUP
) ?: 0, 0);
3739 static void *do_thread(void *data
)
3744 TEST(user_notification_filter_empty_threaded
)
3749 struct pollfd pollfd
;
3750 struct clone_args args
= {
3751 .flags
= CLONE_FILES
,
3752 .exit_signal
= SIGCHLD
,
3755 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3757 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3760 pid
= sys_clone3(&args
, sizeof(args
));
3765 int listener
, status
;
3768 listener
= user_notif_syscall(__NR_dup
, SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3770 _exit(EXIT_FAILURE
);
3772 if (dup2(listener
, 200) != 200)
3773 _exit(EXIT_FAILURE
);
3779 _exit(EXIT_FAILURE
);
3782 _exit(EXIT_SUCCESS
);
3786 _exit(EXIT_FAILURE
);
3789 _exit(EXIT_SUCCESS
);
3791 if (pthread_create(&thread
, NULL
, do_thread
, NULL
) ||
3792 pthread_join(thread
, NULL
))
3793 _exit(EXIT_FAILURE
);
3795 if (pthread_create(&thread
, NULL
, do_thread
, NULL
) ||
3796 pthread_join(thread
, NULL
))
3797 _exit(EXIT_FAILURE
);
3799 if (waitpid(pid1
, &status
, 0) != pid1
|| !WIFEXITED(status
) ||
3800 WEXITSTATUS(status
))
3801 _exit(EXIT_FAILURE
);
3803 if (waitpid(pid2
, &status
, 0) != pid2
|| !WIFEXITED(status
) ||
3804 WEXITSTATUS(status
))
3805 _exit(EXIT_FAILURE
);
3810 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3811 EXPECT_EQ(true, WIFEXITED(status
));
3812 EXPECT_EQ(0, WEXITSTATUS(status
));
3815 * The seccomp filter has become unused so we should be notified once
3816 * the kernel gets around to cleaning up task struct.
3819 pollfd
.events
= POLLHUP
;
3821 EXPECT_GT(poll(&pollfd
, 1, 2000), 0);
3822 EXPECT_GT((pollfd
.revents
& POLLHUP
) ?: 0, 0);
3825 TEST(user_notification_addfd
)
3829 int status
, listener
, memfd
, fd
;
3830 struct seccomp_notif_addfd addfd
= {};
3831 struct seccomp_notif_addfd_small small
= {};
3832 struct seccomp_notif_addfd_big big
= {};
3833 struct seccomp_notif req
= {};
3834 struct seccomp_notif_resp resp
= {};
3836 struct timespec delay
= { .tv_nsec
= 100000000 };
3838 memfd
= memfd_create("test", 0);
3839 ASSERT_GE(memfd
, 0);
3841 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3843 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3846 /* Check that the basic notification machinery works */
3847 listener
= user_notif_syscall(__NR_getppid
,
3848 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3849 ASSERT_GE(listener
, 0);
3855 if (syscall(__NR_getppid
) != USER_NOTIF_MAGIC
)
3857 exit(syscall(__NR_getppid
) != USER_NOTIF_MAGIC
);
3860 ASSERT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3862 addfd
.srcfd
= memfd
;
3867 /* Verify bad newfd_flags cannot be set */
3868 addfd
.newfd_flags
= ~O_CLOEXEC
;
3869 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
), -1);
3870 EXPECT_EQ(errno
, EINVAL
);
3871 addfd
.newfd_flags
= O_CLOEXEC
;
3873 /* Verify bad flags cannot be set */
3875 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
), -1);
3876 EXPECT_EQ(errno
, EINVAL
);
3879 /* Verify that remote_fd cannot be set without setting flags */
3881 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
), -1);
3882 EXPECT_EQ(errno
, EINVAL
);
3885 /* Verify small size cannot be set */
3886 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD_SMALL
, &small
), -1);
3887 EXPECT_EQ(errno
, EINVAL
);
3889 /* Verify we can't send bits filled in unknown buffer area */
3890 memset(&big
, 0xAA, sizeof(big
));
3892 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD_BIG
, &big
), -1);
3893 EXPECT_EQ(errno
, E2BIG
);
3896 /* Verify we can set an arbitrary remote fd */
3897 fd
= ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
);
3899 * The child has fds 0(stdin), 1(stdout), 2(stderr), 3(memfd),
3900 * 4(listener), so the newly allocated fd should be 5.
3903 EXPECT_EQ(filecmp(getpid(), pid
, memfd
, fd
), 0);
3905 /* Verify we can set an arbitrary remote fd with large size */
3906 memset(&big
, 0x0, sizeof(big
));
3908 fd
= ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD_BIG
, &big
);
3911 /* Verify we can set a specific remote fd */
3913 addfd
.flags
= SECCOMP_ADDFD_FLAG_SETFD
;
3914 fd
= ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
);
3916 EXPECT_EQ(filecmp(getpid(), pid
, memfd
, fd
), 0);
3918 /* Resume syscall */
3921 resp
.val
= USER_NOTIF_MAGIC
;
3922 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3925 * This sets the ID of the ADD FD to the last request plus 1. The
3926 * notification ID increments 1 per notification.
3928 addfd
.id
= req
.id
+ 1;
3930 /* This spins until the underlying notification is generated */
3931 while (ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
) != -1 &&
3932 errno
!= -EINPROGRESS
)
3933 nanosleep(&delay
, NULL
);
3935 memset(&req
, 0, sizeof(req
));
3936 ASSERT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3937 ASSERT_EQ(addfd
.id
, req
.id
);
3941 resp
.val
= USER_NOTIF_MAGIC
;
3942 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
3944 /* Wait for child to finish. */
3945 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
3946 EXPECT_EQ(true, WIFEXITED(status
));
3947 EXPECT_EQ(0, WEXITSTATUS(status
));
3952 TEST(user_notification_addfd_rlimit
)
3956 int status
, listener
, memfd
;
3957 struct seccomp_notif_addfd addfd
= {};
3958 struct seccomp_notif req
= {};
3959 struct seccomp_notif_resp resp
= {};
3960 const struct rlimit lim
= {
3965 memfd
= memfd_create("test", 0);
3966 ASSERT_GE(memfd
, 0);
3968 ret
= prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0);
3970 TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
3973 /* Check that the basic notification machinery works */
3974 listener
= user_notif_syscall(__NR_getppid
,
3975 SECCOMP_FILTER_FLAG_NEW_LISTENER
);
3976 ASSERT_GE(listener
, 0);
3982 exit(syscall(__NR_getppid
) != USER_NOTIF_MAGIC
);
3985 ASSERT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_RECV
, &req
), 0);
3987 ASSERT_EQ(prlimit(pid
, RLIMIT_NOFILE
, &lim
, NULL
), 0);
3989 addfd
.srcfd
= memfd
;
3990 addfd
.newfd_flags
= O_CLOEXEC
;
3995 /* Should probably spot check /proc/sys/fs/file-nr */
3996 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
), -1);
3997 EXPECT_EQ(errno
, EMFILE
);
4000 addfd
.flags
= SECCOMP_ADDFD_FLAG_SETFD
;
4001 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_ADDFD
, &addfd
), -1);
4002 EXPECT_EQ(errno
, EBADF
);
4006 resp
.val
= USER_NOTIF_MAGIC
;
4008 EXPECT_EQ(ioctl(listener
, SECCOMP_IOCTL_NOTIF_SEND
, &resp
), 0);
4010 /* Wait for child to finish. */
4011 EXPECT_EQ(waitpid(pid
, &status
, 0), pid
);
4012 EXPECT_EQ(true, WIFEXITED(status
));
4013 EXPECT_EQ(0, WEXITSTATUS(status
));
4020 * - expand NNP testing
4021 * - better arch-specific TRACE and TRAP handlers.
4022 * - endianness checking when appropriate
4023 * - 64-bit arg prodding
4024 * - arch value testing (x86 modes especially)
4025 * - verify that FILTER_FLAG_LOG filters generate log messages
4026 * - verify that RET_LOG generates log messages