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2f668be7 EO |
1 | /* |
2 | * QEMU seccomp mode 2 support with libseccomp | |
3 | * | |
4 | * Copyright IBM, Corp. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Eduardo Otubo <eotubo@br.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | * Contributions after 2012-01-13 are licensed under the terms of the | |
13 | * GNU GPL, version 2 or (at your option) any later version. | |
14 | */ | |
15 | #include <stdio.h> | |
16 | #include <seccomp.h> | |
9c17d615 | 17 | #include "sysemu/seccomp.h" |
2f668be7 EO |
18 | |
19 | struct QemuSeccompSyscall { | |
20 | int32_t num; | |
21 | uint8_t priority; | |
22 | }; | |
23 | ||
24 | static const struct QemuSeccompSyscall seccomp_whitelist[] = { | |
25 | { SCMP_SYS(timer_settime), 255 }, | |
26 | { SCMP_SYS(timer_gettime), 254 }, | |
27 | { SCMP_SYS(futex), 253 }, | |
28 | { SCMP_SYS(select), 252 }, | |
fe512d65 | 29 | #if defined(__x86_64__) |
2f668be7 EO |
30 | { SCMP_SYS(recvfrom), 251 }, |
31 | { SCMP_SYS(sendto), 250 }, | |
fe512d65 EO |
32 | #elif defined(__i386__) |
33 | { SCMP_SYS(socketcall), 250 }, | |
34 | #endif | |
2f668be7 EO |
35 | { SCMP_SYS(read), 249 }, |
36 | { SCMP_SYS(brk), 248 }, | |
37 | { SCMP_SYS(clone), 247 }, | |
38 | { SCMP_SYS(mmap), 247 }, | |
39 | { SCMP_SYS(mprotect), 246 }, | |
40 | { SCMP_SYS(execve), 245 }, | |
41 | { SCMP_SYS(open), 245 }, | |
42 | { SCMP_SYS(ioctl), 245 }, | |
fe512d65 EO |
43 | #if defined(__x86_64__) |
44 | { SCMP_SYS(socket), 245 }, | |
45 | { SCMP_SYS(setsockopt), 245 }, | |
2f668be7 EO |
46 | { SCMP_SYS(recvmsg), 245 }, |
47 | { SCMP_SYS(sendmsg), 245 }, | |
48 | { SCMP_SYS(accept), 245 }, | |
49 | { SCMP_SYS(connect), 245 }, | |
fe512d65 EO |
50 | { SCMP_SYS(socketpair), 245 }, |
51 | { SCMP_SYS(bind), 245 }, | |
52 | { SCMP_SYS(listen), 245 }, | |
53 | { SCMP_SYS(semget), 245 }, | |
54 | #elif defined(__i386__) | |
55 | { SCMP_SYS(ipc), 245 }, | |
56 | #endif | |
2f668be7 EO |
57 | { SCMP_SYS(gettimeofday), 245 }, |
58 | { SCMP_SYS(readlink), 245 }, | |
59 | { SCMP_SYS(access), 245 }, | |
60 | { SCMP_SYS(prctl), 245 }, | |
61 | { SCMP_SYS(signalfd), 245 }, | |
fe512d65 EO |
62 | { SCMP_SYS(getrlimit), 245 }, |
63 | { SCMP_SYS(set_tid_address), 245 }, | |
64 | { SCMP_SYS(statfs), 245 }, | |
65 | { SCMP_SYS(unlink), 245 }, | |
66 | { SCMP_SYS(wait4), 245 }, | |
2f668be7 EO |
67 | #if defined(__i386__) |
68 | { SCMP_SYS(fcntl64), 245 }, | |
69 | { SCMP_SYS(fstat64), 245 }, | |
70 | { SCMP_SYS(stat64), 245 }, | |
71 | { SCMP_SYS(getgid32), 245 }, | |
72 | { SCMP_SYS(getegid32), 245 }, | |
73 | { SCMP_SYS(getuid32), 245 }, | |
74 | { SCMP_SYS(geteuid32), 245 }, | |
75 | { SCMP_SYS(sigreturn), 245 }, | |
76 | { SCMP_SYS(_newselect), 245 }, | |
77 | { SCMP_SYS(_llseek), 245 }, | |
fe512d65 | 78 | { SCMP_SYS(mmap2), 245 }, |
2f668be7 | 79 | { SCMP_SYS(sigprocmask), 245 }, |
2f668be7 | 80 | #endif |
fe512d65 EO |
81 | { SCMP_SYS(sched_getparam), 245 }, |
82 | { SCMP_SYS(sched_getscheduler), 245 }, | |
83 | { SCMP_SYS(fstat), 245 }, | |
84 | { SCMP_SYS(clock_getres), 245 }, | |
85 | { SCMP_SYS(sched_get_priority_min), 245 }, | |
86 | { SCMP_SYS(sched_get_priority_max), 245 }, | |
87 | { SCMP_SYS(stat), 245 }, | |
88 | { SCMP_SYS(uname), 245 }, | |
2f668be7 EO |
89 | { SCMP_SYS(eventfd2), 245 }, |
90 | { SCMP_SYS(dup), 245 }, | |
fe512d65 EO |
91 | { SCMP_SYS(dup2), 245 }, |
92 | { SCMP_SYS(dup3), 245 }, | |
2f668be7 | 93 | { SCMP_SYS(gettid), 245 }, |
fe512d65 EO |
94 | { SCMP_SYS(getgid), 245 }, |
95 | { SCMP_SYS(getegid), 245 }, | |
96 | { SCMP_SYS(getuid), 245 }, | |
97 | { SCMP_SYS(geteuid), 245 }, | |
2f668be7 EO |
98 | { SCMP_SYS(timer_create), 245 }, |
99 | { SCMP_SYS(exit), 245 }, | |
100 | { SCMP_SYS(clock_gettime), 245 }, | |
101 | { SCMP_SYS(time), 245 }, | |
102 | { SCMP_SYS(restart_syscall), 245 }, | |
103 | { SCMP_SYS(pwrite64), 245 }, | |
fe512d65 | 104 | { SCMP_SYS(nanosleep), 245 }, |
2f668be7 EO |
105 | { SCMP_SYS(chown), 245 }, |
106 | { SCMP_SYS(openat), 245 }, | |
107 | { SCMP_SYS(getdents), 245 }, | |
108 | { SCMP_SYS(timer_delete), 245 }, | |
109 | { SCMP_SYS(exit_group), 245 }, | |
110 | { SCMP_SYS(rt_sigreturn), 245 }, | |
111 | { SCMP_SYS(sync), 245 }, | |
112 | { SCMP_SYS(pread64), 245 }, | |
113 | { SCMP_SYS(madvise), 245 }, | |
114 | { SCMP_SYS(set_robust_list), 245 }, | |
115 | { SCMP_SYS(lseek), 245 }, | |
116 | { SCMP_SYS(pselect6), 245 }, | |
117 | { SCMP_SYS(fork), 245 }, | |
2f668be7 EO |
118 | { SCMP_SYS(eventfd), 245 }, |
119 | { SCMP_SYS(rt_sigprocmask), 245 }, | |
120 | { SCMP_SYS(write), 244 }, | |
121 | { SCMP_SYS(fcntl), 243 }, | |
122 | { SCMP_SYS(tgkill), 242 }, | |
123 | { SCMP_SYS(rt_sigaction), 242 }, | |
124 | { SCMP_SYS(pipe2), 242 }, | |
125 | { SCMP_SYS(munmap), 242 }, | |
126 | { SCMP_SYS(mremap), 242 }, | |
fe512d65 EO |
127 | { SCMP_SYS(fdatasync), 242 }, |
128 | { SCMP_SYS(close), 242 }, | |
129 | { SCMP_SYS(rt_sigpending), 242 }, | |
130 | { SCMP_SYS(rt_sigtimedwait), 242 }, | |
131 | { SCMP_SYS(readv), 242 }, | |
132 | { SCMP_SYS(writev), 242 }, | |
133 | { SCMP_SYS(preadv), 242 }, | |
134 | { SCMP_SYS(pwritev), 242 }, | |
135 | { SCMP_SYS(setrlimit), 242 }, | |
136 | { SCMP_SYS(ftruncate), 242 }, | |
137 | { SCMP_SYS(lstat), 242 }, | |
138 | { SCMP_SYS(pipe), 242 }, | |
139 | { SCMP_SYS(umask), 242 }, | |
140 | { SCMP_SYS(chdir), 242 }, | |
141 | { SCMP_SYS(setitimer), 242 }, | |
142 | { SCMP_SYS(setsid), 242 }, | |
143 | { SCMP_SYS(poll), 242 }, | |
144 | { SCMP_SYS(epoll_create), 242 }, | |
145 | { SCMP_SYS(epoll_ctl), 242 }, | |
146 | { SCMP_SYS(epoll_wait), 242 }, | |
147 | #if defined(__i386__) | |
148 | { SCMP_SYS(waitpid), 242 }, | |
149 | #elif defined(__x86_64__) | |
2f668be7 EO |
150 | { SCMP_SYS(getsockname), 242 }, |
151 | { SCMP_SYS(getpeername), 242 }, | |
fe512d65 EO |
152 | { SCMP_SYS(accept4), 242 }, |
153 | { SCMP_SYS(newfstatat), 241 }, | |
154 | { SCMP_SYS(shutdown), 241 }, | |
155 | { SCMP_SYS(getsockopt), 241 }, | |
156 | { SCMP_SYS(semctl), 241 }, | |
157 | { SCMP_SYS(semop), 241 }, | |
158 | { SCMP_SYS(semtimedop), 241 }, | |
159 | { SCMP_SYS(epoll_ctl_old), 241 }, | |
160 | { SCMP_SYS(epoll_wait_old), 241 }, | |
161 | #endif | |
162 | { SCMP_SYS(epoll_pwait), 241 }, | |
163 | { SCMP_SYS(epoll_create1), 241 }, | |
164 | { SCMP_SYS(ppoll), 241 }, | |
165 | { SCMP_SYS(creat), 241 }, | |
166 | { SCMP_SYS(link), 241 }, | |
167 | { SCMP_SYS(getpid), 241 }, | |
168 | { SCMP_SYS(getppid), 241 }, | |
169 | { SCMP_SYS(getpgrp), 241 }, | |
170 | { SCMP_SYS(getpgid), 241 }, | |
171 | { SCMP_SYS(getsid), 241 }, | |
172 | { SCMP_SYS(getdents64), 241 }, | |
173 | { SCMP_SYS(getresuid), 241 }, | |
174 | { SCMP_SYS(getresgid), 241 }, | |
175 | { SCMP_SYS(getgroups), 241 }, | |
176 | #if defined(__i386__) | |
177 | { SCMP_SYS(getresuid32), 241 }, | |
178 | { SCMP_SYS(getresgid32), 241 }, | |
179 | { SCMP_SYS(getgroups32), 241 }, | |
180 | { SCMP_SYS(signal), 241 }, | |
181 | { SCMP_SYS(sigaction), 241 }, | |
182 | { SCMP_SYS(sigsuspend), 241 }, | |
183 | { SCMP_SYS(sigpending), 241 }, | |
184 | { SCMP_SYS(truncate64), 241 }, | |
185 | { SCMP_SYS(ftruncate64), 241 }, | |
186 | { SCMP_SYS(fchown32), 241 }, | |
187 | { SCMP_SYS(chown32), 241 }, | |
188 | { SCMP_SYS(lchown32), 241 }, | |
189 | { SCMP_SYS(statfs64), 241 }, | |
190 | { SCMP_SYS(fstatfs64), 241 }, | |
191 | { SCMP_SYS(fstatat64), 241 }, | |
192 | { SCMP_SYS(lstat64), 241 }, | |
193 | { SCMP_SYS(sendfile64), 241 }, | |
194 | { SCMP_SYS(ugetrlimit), 241 }, | |
195 | #endif | |
196 | { SCMP_SYS(alarm), 241 }, | |
197 | { SCMP_SYS(rt_sigsuspend), 241 }, | |
198 | { SCMP_SYS(rt_sigqueueinfo), 241 }, | |
199 | { SCMP_SYS(rt_tgsigqueueinfo), 241 }, | |
200 | { SCMP_SYS(sigaltstack), 241 }, | |
201 | { SCMP_SYS(signalfd4), 241 }, | |
202 | { SCMP_SYS(truncate), 241 }, | |
203 | { SCMP_SYS(fchown), 241 }, | |
204 | { SCMP_SYS(lchown), 241 }, | |
205 | { SCMP_SYS(fchownat), 241 }, | |
206 | { SCMP_SYS(fstatfs), 241 }, | |
207 | { SCMP_SYS(sendfile), 241 }, | |
208 | { SCMP_SYS(getitimer), 241 }, | |
209 | { SCMP_SYS(syncfs), 241 }, | |
210 | { SCMP_SYS(fsync), 241 }, | |
211 | { SCMP_SYS(fchdir), 241 }, | |
212 | { SCMP_SYS(flock), 241 }, | |
213 | { SCMP_SYS(msync), 241 }, | |
214 | { SCMP_SYS(sched_setparam), 241 }, | |
215 | { SCMP_SYS(sched_setscheduler), 241 }, | |
216 | { SCMP_SYS(sched_yield), 241 }, | |
217 | { SCMP_SYS(sched_rr_get_interval), 241 }, | |
218 | { SCMP_SYS(sched_setaffinity), 241 }, | |
219 | { SCMP_SYS(sched_getaffinity), 241 }, | |
220 | { SCMP_SYS(readahead), 241 }, | |
221 | { SCMP_SYS(timer_getoverrun), 241 }, | |
222 | { SCMP_SYS(unlinkat), 241 }, | |
223 | { SCMP_SYS(readlinkat), 241 }, | |
224 | { SCMP_SYS(faccessat), 241 }, | |
225 | { SCMP_SYS(get_robust_list), 241 }, | |
226 | { SCMP_SYS(splice), 241 }, | |
227 | { SCMP_SYS(vmsplice), 241 }, | |
228 | { SCMP_SYS(getcpu), 241 }, | |
229 | { SCMP_SYS(sendmmsg), 241 }, | |
230 | { SCMP_SYS(recvmmsg), 241 }, | |
231 | { SCMP_SYS(prlimit64), 241 }, | |
232 | { SCMP_SYS(waitid), 241 } | |
2f668be7 EO |
233 | }; |
234 | ||
235 | int seccomp_start(void) | |
236 | { | |
237 | int rc = 0; | |
238 | unsigned int i = 0; | |
239 | scmp_filter_ctx ctx; | |
240 | ||
241 | ctx = seccomp_init(SCMP_ACT_KILL); | |
242 | if (ctx == NULL) { | |
243 | goto seccomp_return; | |
244 | } | |
245 | ||
246 | for (i = 0; i < ARRAY_SIZE(seccomp_whitelist); i++) { | |
247 | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, seccomp_whitelist[i].num, 0); | |
248 | if (rc < 0) { | |
249 | goto seccomp_return; | |
250 | } | |
251 | rc = seccomp_syscall_priority(ctx, seccomp_whitelist[i].num, | |
252 | seccomp_whitelist[i].priority); | |
253 | if (rc < 0) { | |
254 | goto seccomp_return; | |
255 | } | |
256 | } | |
257 | ||
258 | rc = seccomp_load(ctx); | |
259 | ||
260 | seccomp_return: | |
261 | seccomp_release(ctx); | |
262 | return rc; | |
263 | } |