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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/compat.c | |
3 | * | |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support | |
5 | * on 64 bit kernels. | |
6 | * | |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation | |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
a2531293 | 11 | * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
1da177e4 LT |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
85c9fe8f | 18 | #include <linux/stddef.h> |
022a1692 | 19 | #include <linux/kernel.h> |
1da177e4 LT |
20 | #include <linux/linkage.h> |
21 | #include <linux/compat.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/time.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/fcntl.h> | |
26 | #include <linux/namei.h> | |
27 | #include <linux/file.h> | |
9f3acc31 | 28 | #include <linux/fdtable.h> |
1da177e4 | 29 | #include <linux/vfs.h> |
1da177e4 LT |
30 | #include <linux/ioctl.h> |
31 | #include <linux/init.h> | |
1da177e4 | 32 | #include <linux/ncp_mount.h> |
9a9947bf | 33 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
34 | #include <linux/syscalls.h> |
35 | #include <linux/ctype.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/dirent.h> | |
0eeca283 | 38 | #include <linux/fsnotify.h> |
1da177e4 | 39 | #include <linux/highuid.h> |
1da177e4 LT |
40 | #include <linux/nfsd/syscall.h> |
41 | #include <linux/personality.h> | |
42 | #include <linux/rwsem.h> | |
8f0ab514 | 43 | #include <linux/tsacct_kern.h> |
6272e266 | 44 | #include <linux/security.h> |
a1f8e7f7 | 45 | #include <linux/highmem.h> |
6d18c922 | 46 | #include <linux/signal.h> |
bd01f843 | 47 | #include <linux/poll.h> |
4a805e86 | 48 | #include <linux/mm.h> |
f6dfb4fd | 49 | #include <linux/eventpoll.h> |
498052bb | 50 | #include <linux/fs_struct.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
504b701b | 52 | #include <linux/pagemap.h> |
1da177e4 | 53 | |
1da177e4 LT |
54 | #include <asm/uaccess.h> |
55 | #include <asm/mmu_context.h> | |
56 | #include <asm/ioctls.h> | |
07f3f05c | 57 | #include "internal.h" |
9f72949f | 58 | |
bebfa101 AK |
59 | int compat_log = 1; |
60 | ||
61 | int compat_printk(const char *fmt, ...) | |
62 | { | |
63 | va_list ap; | |
64 | int ret; | |
65 | if (!compat_log) | |
66 | return 0; | |
67 | va_start(ap, fmt); | |
68 | ret = vprintk(fmt, ap); | |
69 | va_end(ap); | |
70 | return ret; | |
71 | } | |
72 | ||
ee0b3e67 BP |
73 | #include "read_write.h" |
74 | ||
1da177e4 LT |
75 | /* |
76 | * Not all architectures have sys_utime, so implement this in terms | |
77 | * of sys_utimes. | |
78 | */ | |
c7887325 DH |
79 | asmlinkage long compat_sys_utime(const char __user *filename, |
80 | struct compat_utimbuf __user *t) | |
1da177e4 | 81 | { |
1c710c89 | 82 | struct timespec tv[2]; |
1da177e4 LT |
83 | |
84 | if (t) { | |
85 | if (get_user(tv[0].tv_sec, &t->actime) || | |
86 | get_user(tv[1].tv_sec, &t->modtime)) | |
87 | return -EFAULT; | |
1c710c89 UD |
88 | tv[0].tv_nsec = 0; |
89 | tv[1].tv_nsec = 0; | |
1da177e4 | 90 | } |
1c710c89 UD |
91 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
92 | } | |
93 | ||
c7887325 | 94 | asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags) |
1c710c89 UD |
95 | { |
96 | struct timespec tv[2]; | |
97 | ||
98 | if (t) { | |
99 | if (get_compat_timespec(&tv[0], &t[0]) || | |
100 | get_compat_timespec(&tv[1], &t[1])) | |
101 | return -EFAULT; | |
102 | ||
1c710c89 UD |
103 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
104 | return 0; | |
105 | } | |
106 | return do_utimes(dfd, filename, t ? tv : NULL, flags); | |
1da177e4 LT |
107 | } |
108 | ||
c7887325 | 109 | asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t) |
1da177e4 | 110 | { |
1c710c89 | 111 | struct timespec tv[2]; |
1da177e4 | 112 | |
9ad11ab4 | 113 | if (t) { |
1da177e4 | 114 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
1c710c89 | 115 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
1da177e4 | 116 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
1c710c89 | 117 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
9ad11ab4 | 118 | return -EFAULT; |
1c710c89 UD |
119 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
120 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) | |
121 | return -EINVAL; | |
122 | tv[0].tv_nsec *= 1000; | |
123 | tv[1].tv_nsec *= 1000; | |
9ad11ab4 | 124 | } |
1c710c89 | 125 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
5590ff0d UD |
126 | } |
127 | ||
c7887325 | 128 | asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t) |
5590ff0d UD |
129 | { |
130 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
131 | } |
132 | ||
f7a5000f CH |
133 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
134 | { | |
135 | compat_ino_t ino = stat->ino; | |
136 | typeof(ubuf->st_uid) uid = 0; | |
137 | typeof(ubuf->st_gid) gid = 0; | |
138 | int err; | |
139 | ||
140 | SET_UID(uid, stat->uid); | |
141 | SET_GID(gid, stat->gid); | |
142 | ||
143 | if ((u64) stat->size > MAX_NON_LFS || | |
144 | !old_valid_dev(stat->dev) || | |
145 | !old_valid_dev(stat->rdev)) | |
146 | return -EOVERFLOW; | |
147 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) | |
148 | return -EOVERFLOW; | |
149 | ||
150 | if (clear_user(ubuf, sizeof(*ubuf))) | |
151 | return -EFAULT; | |
152 | ||
153 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); | |
154 | err |= __put_user(ino, &ubuf->st_ino); | |
155 | err |= __put_user(stat->mode, &ubuf->st_mode); | |
156 | err |= __put_user(stat->nlink, &ubuf->st_nlink); | |
157 | err |= __put_user(uid, &ubuf->st_uid); | |
158 | err |= __put_user(gid, &ubuf->st_gid); | |
159 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); | |
160 | err |= __put_user(stat->size, &ubuf->st_size); | |
161 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); | |
162 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); | |
163 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); | |
164 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
165 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); | |
166 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
167 | err |= __put_user(stat->blksize, &ubuf->st_blksize); | |
168 | err |= __put_user(stat->blocks, &ubuf->st_blocks); | |
169 | return err; | |
170 | } | |
171 | ||
c7887325 | 172 | asmlinkage long compat_sys_newstat(const char __user * filename, |
1da177e4 LT |
173 | struct compat_stat __user *statbuf) |
174 | { | |
175 | struct kstat stat; | |
2eae7a18 | 176 | int error; |
1da177e4 | 177 | |
2eae7a18 CH |
178 | error = vfs_stat(filename, &stat); |
179 | if (error) | |
180 | return error; | |
181 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
182 | } |
183 | ||
c7887325 | 184 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
1da177e4 LT |
185 | struct compat_stat __user *statbuf) |
186 | { | |
187 | struct kstat stat; | |
2eae7a18 | 188 | int error; |
1da177e4 | 189 | |
2eae7a18 CH |
190 | error = vfs_lstat(filename, &stat); |
191 | if (error) | |
192 | return error; | |
193 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
194 | } |
195 | ||
82d821dd | 196 | #ifndef __ARCH_WANT_STAT64 |
c7887325 DH |
197 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
198 | const char __user *filename, | |
5590ff0d UD |
199 | struct compat_stat __user *statbuf, int flag) |
200 | { | |
201 | struct kstat stat; | |
0112fc22 | 202 | int error; |
5590ff0d | 203 | |
0112fc22 OD |
204 | error = vfs_fstatat(dfd, filename, &stat, flag); |
205 | if (error) | |
206 | return error; | |
207 | return cp_compat_stat(&stat, statbuf); | |
5590ff0d | 208 | } |
82d821dd | 209 | #endif |
5590ff0d | 210 | |
1da177e4 LT |
211 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
212 | struct compat_stat __user * statbuf) | |
213 | { | |
214 | struct kstat stat; | |
215 | int error = vfs_fstat(fd, &stat); | |
216 | ||
217 | if (!error) | |
218 | error = cp_compat_stat(&stat, statbuf); | |
219 | return error; | |
220 | } | |
221 | ||
222 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
223 | { | |
224 | ||
225 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
226 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
227 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
228 | return -EOVERFLOW; |
229 | /* f_files and f_ffree may be -1; it's okay | |
230 | * to stuff that into 32 bits */ | |
231 | if (kbuf->f_files != 0xffffffffffffffffULL | |
232 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
233 | return -EOVERFLOW; | |
234 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
235 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
236 | return -EOVERFLOW; | |
237 | } | |
238 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
239 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
240 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
241 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
242 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
243 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
244 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
245 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
246 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
247 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
248 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
249 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
250 | __put_user(0, &ubuf->f_spare[0]) || | |
251 | __put_user(0, &ubuf->f_spare[1]) || | |
252 | __put_user(0, &ubuf->f_spare[2]) || | |
253 | __put_user(0, &ubuf->f_spare[3]) || | |
254 | __put_user(0, &ubuf->f_spare[4])) | |
255 | return -EFAULT; | |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* | |
260 | * The following statfs calls are copies of code from fs/open.c and | |
261 | * should be checked against those from time to time | |
262 | */ | |
2d8f3038 | 263 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
1da177e4 | 264 | { |
2d8f3038 | 265 | struct path path; |
1da177e4 LT |
266 | int error; |
267 | ||
2d8f3038 | 268 | error = user_path(pathname, &path); |
1da177e4 LT |
269 | if (!error) { |
270 | struct kstatfs tmp; | |
ebabe9a9 | 271 | error = vfs_statfs(&path, &tmp); |
86e07ce7 DG |
272 | if (!error) |
273 | error = put_compat_statfs(buf, &tmp); | |
2d8f3038 | 274 | path_put(&path); |
1da177e4 LT |
275 | } |
276 | return error; | |
277 | } | |
278 | ||
279 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
280 | { | |
281 | struct file * file; | |
282 | struct kstatfs tmp; | |
283 | int error; | |
284 | ||
285 | error = -EBADF; | |
286 | file = fget(fd); | |
287 | if (!file) | |
288 | goto out; | |
ebabe9a9 | 289 | error = vfs_statfs(&file->f_path, &tmp); |
86e07ce7 DG |
290 | if (!error) |
291 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
292 | fput(file); |
293 | out: | |
294 | return error; | |
295 | } | |
296 | ||
297 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
298 | { | |
299 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
300 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
301 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
302 | return -EOVERFLOW; |
303 | /* f_files and f_ffree may be -1; it's okay | |
304 | * to stuff that into 32 bits */ | |
305 | if (kbuf->f_files != 0xffffffffffffffffULL | |
306 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
307 | return -EOVERFLOW; | |
308 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
309 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
310 | return -EOVERFLOW; | |
311 | } | |
312 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
313 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
314 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
315 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
316 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
317 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
318 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
319 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
320 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
321 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
322 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
323 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
324 | return -EFAULT; | |
325 | return 0; | |
326 | } | |
327 | ||
2d8f3038 | 328 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
1da177e4 | 329 | { |
2d8f3038 | 330 | struct path path; |
1da177e4 LT |
331 | int error; |
332 | ||
333 | if (sz != sizeof(*buf)) | |
334 | return -EINVAL; | |
335 | ||
2d8f3038 | 336 | error = user_path(pathname, &path); |
1da177e4 LT |
337 | if (!error) { |
338 | struct kstatfs tmp; | |
ebabe9a9 | 339 | error = vfs_statfs(&path, &tmp); |
86e07ce7 DG |
340 | if (!error) |
341 | error = put_compat_statfs64(buf, &tmp); | |
2d8f3038 | 342 | path_put(&path); |
1da177e4 LT |
343 | } |
344 | return error; | |
345 | } | |
346 | ||
347 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
348 | { | |
349 | struct file * file; | |
350 | struct kstatfs tmp; | |
351 | int error; | |
352 | ||
353 | if (sz != sizeof(*buf)) | |
354 | return -EINVAL; | |
355 | ||
356 | error = -EBADF; | |
357 | file = fget(fd); | |
358 | if (!file) | |
359 | goto out; | |
ebabe9a9 | 360 | error = vfs_statfs(&file->f_path, &tmp); |
86e07ce7 DG |
361 | if (!error) |
362 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
363 | fput(file); |
364 | out: | |
365 | return error; | |
366 | } | |
367 | ||
2b1c6bd7 CH |
368 | /* |
369 | * This is a copy of sys_ustat, just dealing with a structure layout. | |
370 | * Given how simple this syscall is that apporach is more maintainable | |
371 | * than the various conversion hacks. | |
372 | */ | |
373 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) | |
374 | { | |
375 | struct super_block *sb; | |
376 | struct compat_ustat tmp; | |
377 | struct kstatfs sbuf; | |
378 | int err; | |
379 | ||
380 | sb = user_get_super(new_decode_dev(dev)); | |
381 | if (!sb) | |
382 | return -EINVAL; | |
ebabe9a9 | 383 | err = statfs_by_dentry(sb->s_root, &sbuf); |
2b1c6bd7 CH |
384 | drop_super(sb); |
385 | if (err) | |
386 | return err; | |
387 | ||
388 | memset(&tmp, 0, sizeof(struct compat_ustat)); | |
389 | tmp.f_tfree = sbuf.f_bfree; | |
390 | tmp.f_tinode = sbuf.f_ffree; | |
391 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) | |
392 | return -EFAULT; | |
393 | return 0; | |
394 | } | |
395 | ||
1da177e4 LT |
396 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
397 | { | |
398 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
399 | __get_user(kfl->l_type, &ufl->l_type) || | |
400 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
401 | __get_user(kfl->l_start, &ufl->l_start) || | |
402 | __get_user(kfl->l_len, &ufl->l_len) || | |
403 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
404 | return -EFAULT; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
409 | { | |
410 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
411 | __put_user(kfl->l_type, &ufl->l_type) || | |
412 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
413 | __put_user(kfl->l_start, &ufl->l_start) || | |
414 | __put_user(kfl->l_len, &ufl->l_len) || | |
415 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
416 | return -EFAULT; | |
417 | return 0; | |
418 | } | |
419 | ||
420 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
421 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
422 | { | |
423 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
424 | __get_user(kfl->l_type, &ufl->l_type) || | |
425 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
426 | __get_user(kfl->l_start, &ufl->l_start) || | |
427 | __get_user(kfl->l_len, &ufl->l_len) || | |
428 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
429 | return -EFAULT; | |
430 | return 0; | |
431 | } | |
432 | #endif | |
433 | ||
434 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
435 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
436 | { | |
437 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
438 | __put_user(kfl->l_type, &ufl->l_type) || | |
439 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
440 | __put_user(kfl->l_start, &ufl->l_start) || | |
441 | __put_user(kfl->l_len, &ufl->l_len) || | |
442 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
443 | return -EFAULT; | |
444 | return 0; | |
445 | } | |
446 | #endif | |
447 | ||
448 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
449 | unsigned long arg) | |
450 | { | |
451 | mm_segment_t old_fs; | |
452 | struct flock f; | |
453 | long ret; | |
454 | ||
455 | switch (cmd) { | |
456 | case F_GETLK: | |
457 | case F_SETLK: | |
458 | case F_SETLKW: | |
459 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
460 | if (ret != 0) | |
461 | break; | |
462 | old_fs = get_fs(); | |
463 | set_fs(KERNEL_DS); | |
464 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
465 | set_fs(old_fs); | |
466 | if (cmd == F_GETLK && ret == 0) { | |
ff677f8d | 467 | /* GETLK was successful and we need to return the data... |
2520f14c N |
468 | * but it needs to fit in the compat structure. |
469 | * l_start shouldn't be too big, unless the original | |
470 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
471 | * case the app was asking for trouble, so we return | |
472 | * -EOVERFLOW in that case. | |
473 | * l_len could be too big, in which case we just truncate it, | |
474 | * and only allow the app to see that part of the conflicting | |
475 | * lock that might make sense to it anyway | |
476 | */ | |
477 | ||
478 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 479 | ret = -EOVERFLOW; |
2520f14c N |
480 | if (f.l_len > COMPAT_OFF_T_MAX) |
481 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
482 | if (ret == 0) |
483 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
484 | } | |
485 | break; | |
486 | ||
487 | case F_GETLK64: | |
488 | case F_SETLK64: | |
489 | case F_SETLKW64: | |
490 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
491 | if (ret != 0) | |
492 | break; | |
493 | old_fs = get_fs(); | |
494 | set_fs(KERNEL_DS); | |
495 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
496 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
497 | (unsigned long)&f); | |
498 | set_fs(old_fs); | |
499 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
500 | /* need to return lock information - see above for commentary */ |
501 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 502 | ret = -EOVERFLOW; |
2520f14c N |
503 | if (f.l_len > COMPAT_LOFF_T_MAX) |
504 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
505 | if (ret == 0) |
506 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
507 | } | |
508 | break; | |
509 | ||
510 | default: | |
511 | ret = sys_fcntl(fd, cmd, arg); | |
512 | break; | |
513 | } | |
514 | return ret; | |
515 | } | |
516 | ||
517 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
518 | unsigned long arg) | |
519 | { | |
520 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
521 | return -EINVAL; | |
522 | return compat_sys_fcntl64(fd, cmd, arg); | |
523 | } | |
524 | ||
525 | asmlinkage long | |
526 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
527 | { | |
528 | long ret; | |
529 | aio_context_t ctx64; | |
530 | ||
531 | mm_segment_t oldfs = get_fs(); | |
532 | if (unlikely(get_user(ctx64, ctx32p))) | |
533 | return -EFAULT; | |
534 | ||
535 | set_fs(KERNEL_DS); | |
536 | /* The __user pointer cast is valid because of the set_fs() */ | |
537 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
538 | set_fs(oldfs); | |
539 | /* truncating is ok because it's a user address */ | |
540 | if (!ret) | |
541 | ret = put_user((u32) ctx64, ctx32p); | |
542 | return ret; | |
543 | } | |
544 | ||
545 | asmlinkage long | |
546 | compat_sys_io_getevents(aio_context_t ctx_id, | |
547 | unsigned long min_nr, | |
548 | unsigned long nr, | |
549 | struct io_event __user *events, | |
550 | struct compat_timespec __user *timeout) | |
551 | { | |
552 | long ret; | |
553 | struct timespec t; | |
554 | struct timespec __user *ut = NULL; | |
555 | ||
556 | ret = -EFAULT; | |
557 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
558 | nr * sizeof(struct io_event)))) | |
559 | goto out; | |
560 | if (timeout) { | |
561 | if (get_compat_timespec(&t, timeout)) | |
562 | goto out; | |
563 | ||
564 | ut = compat_alloc_user_space(sizeof(*ut)); | |
565 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
566 | goto out; | |
567 | } | |
568 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
569 | out: | |
570 | return ret; | |
571 | } | |
572 | ||
b8373363 JM |
573 | /* A write operation does a read from user space and vice versa */ |
574 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) | |
575 | ||
576 | ssize_t compat_rw_copy_check_uvector(int type, | |
577 | const struct compat_iovec __user *uvector, unsigned long nr_segs, | |
578 | unsigned long fast_segs, struct iovec *fast_pointer, | |
579 | struct iovec **ret_pointer) | |
580 | { | |
581 | compat_ssize_t tot_len; | |
582 | struct iovec *iov = *ret_pointer = fast_pointer; | |
583 | ssize_t ret = 0; | |
584 | int seg; | |
585 | ||
586 | /* | |
587 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
588 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
589 | * traditionally returned zero for zero segments, so... | |
590 | */ | |
591 | if (nr_segs == 0) | |
592 | goto out; | |
593 | ||
594 | ret = -EINVAL; | |
595 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) | |
596 | goto out; | |
597 | if (nr_segs > fast_segs) { | |
598 | ret = -ENOMEM; | |
599 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
6a5640f1 | 600 | if (iov == NULL) |
b8373363 | 601 | goto out; |
b8373363 JM |
602 | } |
603 | *ret_pointer = iov; | |
604 | ||
605 | /* | |
606 | * Single unix specification: | |
607 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
435f49a5 | 608 | * ssize_t. |
b8373363 | 609 | * |
435f49a5 LT |
610 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
611 | * no overflow possibility. | |
b8373363 JM |
612 | */ |
613 | tot_len = 0; | |
614 | ret = -EINVAL; | |
615 | for (seg = 0; seg < nr_segs; seg++) { | |
b8373363 JM |
616 | compat_uptr_t buf; |
617 | compat_ssize_t len; | |
618 | ||
619 | if (__get_user(len, &uvector->iov_len) || | |
620 | __get_user(buf, &uvector->iov_base)) { | |
621 | ret = -EFAULT; | |
622 | goto out; | |
623 | } | |
624 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ | |
625 | goto out; | |
7cbe1770 | 626 | if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
b8373363 JM |
627 | ret = -EFAULT; |
628 | goto out; | |
629 | } | |
435f49a5 LT |
630 | if (len > MAX_RW_COUNT - tot_len) |
631 | len = MAX_RW_COUNT - tot_len; | |
632 | tot_len += len; | |
b8373363 JM |
633 | iov->iov_base = compat_ptr(buf); |
634 | iov->iov_len = (compat_size_t) len; | |
635 | uvector++; | |
636 | iov++; | |
637 | } | |
638 | ret = tot_len; | |
639 | ||
640 | out: | |
641 | return ret; | |
642 | } | |
643 | ||
1da177e4 LT |
644 | static inline long |
645 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
646 | { | |
647 | compat_uptr_t uptr; | |
648 | int i; | |
649 | ||
650 | for (i = 0; i < nr; ++i) { | |
651 | if (get_user(uptr, ptr32 + i)) | |
652 | return -EFAULT; | |
653 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
654 | return -EFAULT; | |
655 | } | |
656 | return 0; | |
657 | } | |
658 | ||
659 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
660 | ||
661 | asmlinkage long | |
662 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
663 | { | |
664 | struct iocb __user * __user *iocb64; | |
665 | long ret; | |
666 | ||
667 | if (unlikely(nr < 0)) | |
668 | return -EINVAL; | |
669 | ||
670 | if (nr > MAX_AIO_SUBMITS) | |
671 | nr = MAX_AIO_SUBMITS; | |
672 | ||
673 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
674 | ret = copy_iocb(nr, iocb, iocb64); | |
675 | if (!ret) | |
9d85cba7 | 676 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
1da177e4 LT |
677 | return ret; |
678 | } | |
679 | ||
680 | struct compat_ncp_mount_data { | |
681 | compat_int_t version; | |
682 | compat_uint_t ncp_fd; | |
202e5979 | 683 | __compat_uid_t mounted_uid; |
1da177e4 LT |
684 | compat_pid_t wdog_pid; |
685 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
686 | compat_uint_t time_out; | |
687 | compat_uint_t retry_count; | |
688 | compat_uint_t flags; | |
202e5979 SR |
689 | __compat_uid_t uid; |
690 | __compat_gid_t gid; | |
1da177e4 LT |
691 | compat_mode_t file_mode; |
692 | compat_mode_t dir_mode; | |
693 | }; | |
694 | ||
695 | struct compat_ncp_mount_data_v4 { | |
696 | compat_int_t version; | |
697 | compat_ulong_t flags; | |
698 | compat_ulong_t mounted_uid; | |
699 | compat_long_t wdog_pid; | |
700 | compat_uint_t ncp_fd; | |
701 | compat_uint_t time_out; | |
702 | compat_uint_t retry_count; | |
703 | compat_ulong_t uid; | |
704 | compat_ulong_t gid; | |
705 | compat_ulong_t file_mode; | |
706 | compat_ulong_t dir_mode; | |
707 | }; | |
708 | ||
709 | static void *do_ncp_super_data_conv(void *raw_data) | |
710 | { | |
711 | int version = *(unsigned int *)raw_data; | |
712 | ||
713 | if (version == 3) { | |
714 | struct compat_ncp_mount_data *c_n = raw_data; | |
715 | struct ncp_mount_data *n = raw_data; | |
716 | ||
717 | n->dir_mode = c_n->dir_mode; | |
718 | n->file_mode = c_n->file_mode; | |
719 | n->gid = c_n->gid; | |
720 | n->uid = c_n->uid; | |
721 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
722 | n->wdog_pid = c_n->wdog_pid; | |
723 | n->mounted_uid = c_n->mounted_uid; | |
724 | } else if (version == 4) { | |
725 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
726 | struct ncp_mount_data_v4 *n = raw_data; | |
727 | ||
728 | n->dir_mode = c_n->dir_mode; | |
729 | n->file_mode = c_n->file_mode; | |
730 | n->gid = c_n->gid; | |
731 | n->uid = c_n->uid; | |
732 | n->retry_count = c_n->retry_count; | |
733 | n->time_out = c_n->time_out; | |
734 | n->ncp_fd = c_n->ncp_fd; | |
735 | n->wdog_pid = c_n->wdog_pid; | |
736 | n->mounted_uid = c_n->mounted_uid; | |
737 | n->flags = c_n->flags; | |
738 | } else if (version != 5) { | |
739 | return NULL; | |
740 | } | |
741 | ||
742 | return raw_data; | |
743 | } | |
744 | ||
1da177e4 | 745 | |
9a9947bf DH |
746 | struct compat_nfs_string { |
747 | compat_uint_t len; | |
5fc3e624 | 748 | compat_uptr_t data; |
9a9947bf DH |
749 | }; |
750 | ||
751 | static inline void compat_nfs_string(struct nfs_string *dst, | |
752 | struct compat_nfs_string *src) | |
753 | { | |
754 | dst->data = compat_ptr(src->data); | |
755 | dst->len = src->len; | |
756 | } | |
757 | ||
758 | struct compat_nfs4_mount_data_v1 { | |
759 | compat_int_t version; | |
760 | compat_int_t flags; | |
761 | compat_int_t rsize; | |
762 | compat_int_t wsize; | |
763 | compat_int_t timeo; | |
764 | compat_int_t retrans; | |
765 | compat_int_t acregmin; | |
766 | compat_int_t acregmax; | |
767 | compat_int_t acdirmin; | |
768 | compat_int_t acdirmax; | |
769 | struct compat_nfs_string client_addr; | |
770 | struct compat_nfs_string mnt_path; | |
771 | struct compat_nfs_string hostname; | |
772 | compat_uint_t host_addrlen; | |
5fc3e624 | 773 | compat_uptr_t host_addr; |
9a9947bf DH |
774 | compat_int_t proto; |
775 | compat_int_t auth_flavourlen; | |
5fc3e624 | 776 | compat_uptr_t auth_flavours; |
9a9947bf DH |
777 | }; |
778 | ||
779 | static int do_nfs4_super_data_conv(void *raw_data) | |
780 | { | |
781 | int version = *(compat_uint_t *) raw_data; | |
782 | ||
783 | if (version == 1) { | |
784 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
785 | struct nfs4_mount_data *real = raw_data; | |
786 | ||
787 | /* copy the fields backwards */ | |
788 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
789 | real->auth_flavourlen = raw->auth_flavourlen; | |
790 | real->proto = raw->proto; | |
791 | real->host_addr = compat_ptr(raw->host_addr); | |
792 | real->host_addrlen = raw->host_addrlen; | |
793 | compat_nfs_string(&real->hostname, &raw->hostname); | |
794 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
795 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
796 | real->acdirmax = raw->acdirmax; | |
797 | real->acdirmin = raw->acdirmin; | |
798 | real->acregmax = raw->acregmax; | |
799 | real->acregmin = raw->acregmin; | |
800 | real->retrans = raw->retrans; | |
801 | real->timeo = raw->timeo; | |
802 | real->wsize = raw->wsize; | |
803 | real->rsize = raw->rsize; | |
804 | real->flags = raw->flags; | |
805 | real->version = raw->version; | |
806 | } | |
9a9947bf DH |
807 | |
808 | return 0; | |
809 | } | |
810 | ||
1da177e4 | 811 | #define NCPFS_NAME "ncpfs" |
9a9947bf | 812 | #define NFS4_NAME "nfs4" |
1da177e4 | 813 | |
c7887325 DH |
814 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
815 | const char __user * dir_name, | |
816 | const char __user * type, unsigned long flags, | |
817 | const void __user * data) | |
1da177e4 | 818 | { |
eca6f534 | 819 | char *kernel_type; |
1da177e4 | 820 | unsigned long data_page; |
eca6f534 | 821 | char *kernel_dev; |
1da177e4 LT |
822 | char *dir_page; |
823 | int retval; | |
824 | ||
eca6f534 | 825 | retval = copy_mount_string(type, &kernel_type); |
1da177e4 LT |
826 | if (retval < 0) |
827 | goto out; | |
828 | ||
829 | dir_page = getname(dir_name); | |
830 | retval = PTR_ERR(dir_page); | |
831 | if (IS_ERR(dir_page)) | |
832 | goto out1; | |
833 | ||
eca6f534 | 834 | retval = copy_mount_string(dev_name, &kernel_dev); |
1da177e4 LT |
835 | if (retval < 0) |
836 | goto out2; | |
837 | ||
eca6f534 | 838 | retval = copy_mount_options(data, &data_page); |
1da177e4 LT |
839 | if (retval < 0) |
840 | goto out3; | |
841 | ||
842 | retval = -EINVAL; | |
843 | ||
eca6f534 | 844 | if (kernel_type && data_page) { |
2116b7a4 | 845 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4 | 846 | do_ncp_super_data_conv((void *)data_page); |
eca6f534 | 847 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf DH |
848 | if (do_nfs4_super_data_conv((void *) data_page)) |
849 | goto out4; | |
1da177e4 LT |
850 | } |
851 | } | |
852 | ||
eca6f534 | 853 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
1da177e4 | 854 | flags, (void*)data_page); |
1da177e4 | 855 | |
9a9947bf | 856 | out4: |
1da177e4 LT |
857 | free_page(data_page); |
858 | out3: | |
eca6f534 | 859 | kfree(kernel_dev); |
1da177e4 LT |
860 | out2: |
861 | putname(dir_page); | |
862 | out1: | |
eca6f534 | 863 | kfree(kernel_type); |
1da177e4 LT |
864 | out: |
865 | return retval; | |
866 | } | |
867 | ||
1da177e4 LT |
868 | struct compat_old_linux_dirent { |
869 | compat_ulong_t d_ino; | |
870 | compat_ulong_t d_offset; | |
871 | unsigned short d_namlen; | |
872 | char d_name[1]; | |
873 | }; | |
874 | ||
875 | struct compat_readdir_callback { | |
876 | struct compat_old_linux_dirent __user *dirent; | |
877 | int result; | |
878 | }; | |
879 | ||
880 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 881 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
882 | { |
883 | struct compat_readdir_callback *buf = __buf; | |
884 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 885 | compat_ulong_t d_ino; |
1da177e4 LT |
886 | |
887 | if (buf->result) | |
888 | return -EINVAL; | |
afefdbb2 | 889 | d_ino = ino; |
8f3f655d AV |
890 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
891 | buf->result = -EOVERFLOW; | |
afefdbb2 | 892 | return -EOVERFLOW; |
8f3f655d | 893 | } |
1da177e4 LT |
894 | buf->result++; |
895 | dirent = buf->dirent; | |
896 | if (!access_ok(VERIFY_WRITE, dirent, | |
897 | (unsigned long)(dirent->d_name + namlen + 1) - | |
898 | (unsigned long)dirent)) | |
899 | goto efault; | |
afefdbb2 | 900 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
901 | __put_user(offset, &dirent->d_offset) || |
902 | __put_user(namlen, &dirent->d_namlen) || | |
903 | __copy_to_user(dirent->d_name, name, namlen) || | |
904 | __put_user(0, dirent->d_name + namlen)) | |
905 | goto efault; | |
906 | return 0; | |
907 | efault: | |
908 | buf->result = -EFAULT; | |
909 | return -EFAULT; | |
910 | } | |
911 | ||
912 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
913 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
914 | { | |
915 | int error; | |
916 | struct file *file; | |
917 | struct compat_readdir_callback buf; | |
918 | ||
919 | error = -EBADF; | |
920 | file = fget(fd); | |
921 | if (!file) | |
922 | goto out; | |
923 | ||
924 | buf.result = 0; | |
925 | buf.dirent = dirent; | |
926 | ||
927 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
53c9c5c0 | 928 | if (buf.result) |
1da177e4 LT |
929 | error = buf.result; |
930 | ||
931 | fput(file); | |
932 | out: | |
933 | return error; | |
934 | } | |
935 | ||
936 | struct compat_linux_dirent { | |
937 | compat_ulong_t d_ino; | |
938 | compat_ulong_t d_off; | |
939 | unsigned short d_reclen; | |
940 | char d_name[1]; | |
941 | }; | |
942 | ||
943 | struct compat_getdents_callback { | |
944 | struct compat_linux_dirent __user *current_dir; | |
945 | struct compat_linux_dirent __user *previous; | |
946 | int count; | |
947 | int error; | |
948 | }; | |
949 | ||
950 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 951 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
952 | { |
953 | struct compat_linux_dirent __user * dirent; | |
954 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 955 | compat_ulong_t d_ino; |
85c9fe8f KW |
956 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
957 | namlen + 2, sizeof(compat_long_t)); | |
1da177e4 LT |
958 | |
959 | buf->error = -EINVAL; /* only used if we fail.. */ | |
960 | if (reclen > buf->count) | |
961 | return -EINVAL; | |
afefdbb2 | 962 | d_ino = ino; |
8f3f655d AV |
963 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
964 | buf->error = -EOVERFLOW; | |
afefdbb2 | 965 | return -EOVERFLOW; |
8f3f655d | 966 | } |
1da177e4 LT |
967 | dirent = buf->previous; |
968 | if (dirent) { | |
969 | if (__put_user(offset, &dirent->d_off)) | |
970 | goto efault; | |
971 | } | |
972 | dirent = buf->current_dir; | |
afefdbb2 | 973 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
974 | goto efault; |
975 | if (__put_user(reclen, &dirent->d_reclen)) | |
976 | goto efault; | |
977 | if (copy_to_user(dirent->d_name, name, namlen)) | |
978 | goto efault; | |
979 | if (__put_user(0, dirent->d_name + namlen)) | |
980 | goto efault; | |
981 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
982 | goto efault; | |
983 | buf->previous = dirent; | |
984 | dirent = (void __user *)dirent + reclen; | |
985 | buf->current_dir = dirent; | |
986 | buf->count -= reclen; | |
987 | return 0; | |
988 | efault: | |
989 | buf->error = -EFAULT; | |
990 | return -EFAULT; | |
991 | } | |
992 | ||
993 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
994 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
995 | { | |
996 | struct file * file; | |
997 | struct compat_linux_dirent __user * lastdirent; | |
998 | struct compat_getdents_callback buf; | |
999 | int error; | |
1000 | ||
1001 | error = -EFAULT; | |
1002 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1003 | goto out; | |
1004 | ||
1005 | error = -EBADF; | |
1006 | file = fget(fd); | |
1007 | if (!file) | |
1008 | goto out; | |
1009 | ||
1010 | buf.current_dir = dirent; | |
1011 | buf.previous = NULL; | |
1012 | buf.count = count; | |
1013 | buf.error = 0; | |
1014 | ||
1015 | error = vfs_readdir(file, compat_filldir, &buf); | |
53c9c5c0 AV |
1016 | if (error >= 0) |
1017 | error = buf.error; | |
1da177e4 LT |
1018 | lastdirent = buf.previous; |
1019 | if (lastdirent) { | |
1020 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1021 | error = -EFAULT; | |
1022 | else | |
1023 | error = count - buf.count; | |
1024 | } | |
1da177e4 LT |
1025 | fput(file); |
1026 | out: | |
1027 | return error; | |
1028 | } | |
1029 | ||
1030 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
1031 | |
1032 | struct compat_getdents_callback64 { | |
1033 | struct linux_dirent64 __user *current_dir; | |
1034 | struct linux_dirent64 __user *previous; | |
1035 | int count; | |
1036 | int error; | |
1037 | }; | |
1038 | ||
1039 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1040 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1041 | { |
1042 | struct linux_dirent64 __user *dirent; | |
1043 | struct compat_getdents_callback64 *buf = __buf; | |
85c9fe8f KW |
1044 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
1045 | sizeof(u64)); | |
1da177e4 LT |
1046 | u64 off; |
1047 | ||
1048 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1049 | if (reclen > buf->count) | |
1050 | return -EINVAL; | |
1051 | dirent = buf->previous; | |
1052 | ||
1053 | if (dirent) { | |
1054 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1055 | goto efault; | |
1056 | } | |
1057 | dirent = buf->current_dir; | |
1058 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1059 | goto efault; | |
1060 | off = 0; | |
1061 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1062 | goto efault; | |
1063 | if (__put_user(reclen, &dirent->d_reclen)) | |
1064 | goto efault; | |
1065 | if (__put_user(d_type, &dirent->d_type)) | |
1066 | goto efault; | |
1067 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1068 | goto efault; | |
1069 | if (__put_user(0, dirent->d_name + namlen)) | |
1070 | goto efault; | |
1071 | buf->previous = dirent; | |
1072 | dirent = (void __user *)dirent + reclen; | |
1073 | buf->current_dir = dirent; | |
1074 | buf->count -= reclen; | |
1075 | return 0; | |
1076 | efault: | |
1077 | buf->error = -EFAULT; | |
1078 | return -EFAULT; | |
1079 | } | |
1080 | ||
1081 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1082 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1083 | { | |
1084 | struct file * file; | |
1085 | struct linux_dirent64 __user * lastdirent; | |
1086 | struct compat_getdents_callback64 buf; | |
1087 | int error; | |
1088 | ||
1089 | error = -EFAULT; | |
1090 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1091 | goto out; | |
1092 | ||
1093 | error = -EBADF; | |
1094 | file = fget(fd); | |
1095 | if (!file) | |
1096 | goto out; | |
1097 | ||
1098 | buf.current_dir = dirent; | |
1099 | buf.previous = NULL; | |
1100 | buf.count = count; | |
1101 | buf.error = 0; | |
1102 | ||
1103 | error = vfs_readdir(file, compat_filldir64, &buf); | |
53c9c5c0 AV |
1104 | if (error >= 0) |
1105 | error = buf.error; | |
1da177e4 LT |
1106 | lastdirent = buf.previous; |
1107 | if (lastdirent) { | |
1108 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 | 1109 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0 AV |
1110 | error = -EFAULT; |
1111 | else | |
1112 | error = count - buf.count; | |
1da177e4 | 1113 | } |
1da177e4 LT |
1114 | fput(file); |
1115 | out: | |
1116 | return error; | |
1117 | } | |
1118 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1119 | ||
1120 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1121 | const struct compat_iovec __user *uvector, | |
1122 | unsigned long nr_segs, loff_t *pos) | |
1123 | { | |
1da177e4 LT |
1124 | compat_ssize_t tot_len; |
1125 | struct iovec iovstack[UIO_FASTIOV]; | |
767b68e9 | 1126 | struct iovec *iov = iovstack; |
1da177e4 | 1127 | ssize_t ret; |
1da177e4 LT |
1128 | io_fn_t fn; |
1129 | iov_fn_t fnv; | |
1130 | ||
1da177e4 | 1131 | ret = -EINVAL; |
1da177e4 LT |
1132 | if (!file->f_op) |
1133 | goto out; | |
b8373363 | 1134 | |
1da177e4 LT |
1135 | ret = -EFAULT; |
1136 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1137 | goto out; | |
1138 | ||
b8373363 JM |
1139 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
1140 | UIO_FASTIOV, iovstack, &iov); | |
1da177e4 LT |
1141 | if (tot_len == 0) { |
1142 | ret = 0; | |
1143 | goto out; | |
1144 | } | |
1145 | ||
1146 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1147 | if (ret < 0) |
1da177e4 LT |
1148 | goto out; |
1149 | ||
1150 | fnv = NULL; | |
1151 | if (type == READ) { | |
1152 | fn = file->f_op->read; | |
ee0b3e67 | 1153 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1154 | } else { |
1155 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1156 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1157 | } |
1158 | ||
ee0b3e67 BP |
1159 | if (fnv) |
1160 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1161 | pos, fnv); | |
1162 | else | |
1163 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1164 | |
1da177e4 LT |
1165 | out: |
1166 | if (iov != iovstack) | |
1167 | kfree(iov); | |
0eeca283 | 1168 | if ((ret + (type == READ)) > 0) { |
0eeca283 | 1169 | if (type == READ) |
2a12a9d7 | 1170 | fsnotify_access(file); |
0eeca283 | 1171 | else |
2a12a9d7 | 1172 | fsnotify_modify(file); |
0eeca283 | 1173 | } |
1da177e4 LT |
1174 | return ret; |
1175 | } | |
1176 | ||
dac12138 GH |
1177 | static size_t compat_readv(struct file *file, |
1178 | const struct compat_iovec __user *vec, | |
1179 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1180 | { |
1da177e4 LT |
1181 | ssize_t ret = -EBADF; |
1182 | ||
1da177e4 LT |
1183 | if (!(file->f_mode & FMODE_READ)) |
1184 | goto out; | |
1185 | ||
1186 | ret = -EINVAL; | |
ee0b3e67 | 1187 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1188 | goto out; |
1189 | ||
dac12138 | 1190 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1da177e4 LT |
1191 | |
1192 | out: | |
ca8a5bd2 GH |
1193 | if (ret > 0) |
1194 | add_rchar(current, ret); | |
1195 | inc_syscr(current); | |
dac12138 GH |
1196 | return ret; |
1197 | } | |
1198 | ||
1199 | asmlinkage ssize_t | |
1200 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, | |
1201 | unsigned long vlen) | |
1202 | { | |
1203 | struct file *file; | |
10c7db27 | 1204 | int fput_needed; |
dac12138 GH |
1205 | ssize_t ret; |
1206 | ||
10c7db27 | 1207 | file = fget_light(fd, &fput_needed); |
dac12138 GH |
1208 | if (!file) |
1209 | return -EBADF; | |
1210 | ret = compat_readv(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1211 | fput_light(file, fput_needed); |
1da177e4 LT |
1212 | return ret; |
1213 | } | |
1214 | ||
f3554f4b GH |
1215 | asmlinkage ssize_t |
1216 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1217 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1218 | { |
1219 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1220 | struct file *file; | |
10c7db27 | 1221 | int fput_needed; |
f3554f4b GH |
1222 | ssize_t ret; |
1223 | ||
1224 | if (pos < 0) | |
1225 | return -EINVAL; | |
10c7db27 | 1226 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1227 | if (!file) |
1228 | return -EBADF; | |
1229 | ret = compat_readv(file, vec, vlen, &pos); | |
10c7db27 | 1230 | fput_light(file, fput_needed); |
f3554f4b GH |
1231 | return ret; |
1232 | } | |
1233 | ||
6949a631 GH |
1234 | static size_t compat_writev(struct file *file, |
1235 | const struct compat_iovec __user *vec, | |
1236 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1237 | { |
1da177e4 LT |
1238 | ssize_t ret = -EBADF; |
1239 | ||
1da177e4 LT |
1240 | if (!(file->f_mode & FMODE_WRITE)) |
1241 | goto out; | |
1242 | ||
1243 | ret = -EINVAL; | |
ee0b3e67 | 1244 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1245 | goto out; |
1246 | ||
6949a631 | 1247 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1da177e4 LT |
1248 | |
1249 | out: | |
ca8a5bd2 GH |
1250 | if (ret > 0) |
1251 | add_wchar(current, ret); | |
1252 | inc_syscw(current); | |
6949a631 GH |
1253 | return ret; |
1254 | } | |
1255 | ||
1256 | asmlinkage ssize_t | |
1257 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, | |
1258 | unsigned long vlen) | |
1259 | { | |
1260 | struct file *file; | |
10c7db27 | 1261 | int fput_needed; |
6949a631 GH |
1262 | ssize_t ret; |
1263 | ||
10c7db27 | 1264 | file = fget_light(fd, &fput_needed); |
6949a631 GH |
1265 | if (!file) |
1266 | return -EBADF; | |
1267 | ret = compat_writev(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1268 | fput_light(file, fput_needed); |
1da177e4 LT |
1269 | return ret; |
1270 | } | |
1271 | ||
f3554f4b GH |
1272 | asmlinkage ssize_t |
1273 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1274 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1275 | { |
1276 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1277 | struct file *file; | |
10c7db27 | 1278 | int fput_needed; |
f3554f4b GH |
1279 | ssize_t ret; |
1280 | ||
1281 | if (pos < 0) | |
1282 | return -EINVAL; | |
10c7db27 | 1283 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1284 | if (!file) |
1285 | return -EBADF; | |
1286 | ret = compat_writev(file, vec, vlen, &pos); | |
10c7db27 | 1287 | fput_light(file, fput_needed); |
f3554f4b GH |
1288 | return ret; |
1289 | } | |
1290 | ||
d2610202 AK |
1291 | asmlinkage long |
1292 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1293 | unsigned int nr_segs, unsigned int flags) | |
1294 | { | |
1295 | unsigned i; | |
90cbad65 | 1296 | struct iovec __user *iov; |
98232d50 | 1297 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1298 | return -EINVAL; |
1299 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1300 | for (i = 0; i < nr_segs; i++) { | |
1301 | struct compat_iovec v; | |
1302 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1303 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1304 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1305 | put_user(v.iov_len, &iov[i].iov_len)) | |
1306 | return -EFAULT; | |
1307 | } | |
1308 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1309 | } | |
1310 | ||
e922efc3 MS |
1311 | /* |
1312 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1313 | * O_LARGEFILE flag. | |
1314 | */ | |
1315 | asmlinkage long | |
1316 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1317 | { | |
5590ff0d UD |
1318 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1319 | } | |
1320 | ||
1321 | /* | |
1322 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1323 | * O_LARGEFILE flag. | |
1324 | */ | |
1325 | asmlinkage long | |
9ad11ab4 | 1326 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1327 | { |
1328 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1329 | } |
1330 | ||
1da177e4 LT |
1331 | /* |
1332 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1333 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1334 | * and envp pointers. | |
1335 | */ | |
1336 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1337 | { | |
1338 | int i = 0; | |
1339 | ||
1340 | if (argv != NULL) { | |
1341 | for (;;) { | |
1342 | compat_uptr_t p; | |
1343 | ||
1344 | if (get_user(p, argv)) | |
1345 | return -EFAULT; | |
1346 | if (!p) | |
1347 | break; | |
1348 | argv++; | |
362e6663 | 1349 | if (i++ >= max) |
1da177e4 | 1350 | return -E2BIG; |
114279be ON |
1351 | |
1352 | if (fatal_signal_pending(current)) | |
1353 | return -ERESTARTNOHAND; | |
1354 | cond_resched(); | |
1da177e4 LT |
1355 | } |
1356 | } | |
1357 | return i; | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1362 | * except that it works with 32 bit argv and envp pointers. | |
1363 | */ | |
1364 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1365 | struct linux_binprm *bprm) | |
1366 | { | |
1367 | struct page *kmapped_page = NULL; | |
1368 | char *kaddr = NULL; | |
b6a2fea3 | 1369 | unsigned long kpos = 0; |
1da177e4 LT |
1370 | int ret; |
1371 | ||
1372 | while (argc-- > 0) { | |
1373 | compat_uptr_t str; | |
1374 | int len; | |
1375 | unsigned long pos; | |
1376 | ||
1377 | if (get_user(str, argv+argc) || | |
b6a2fea3 | 1378 | !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) { |
1da177e4 LT |
1379 | ret = -EFAULT; |
1380 | goto out; | |
1381 | } | |
1382 | ||
b6a2fea3 | 1383 | if (len > MAX_ARG_STRLEN) { |
1da177e4 LT |
1384 | ret = -E2BIG; |
1385 | goto out; | |
1386 | } | |
1387 | ||
b6a2fea3 | 1388 | /* We're going to work our way backwords. */ |
1da177e4 | 1389 | pos = bprm->p; |
b6a2fea3 OW |
1390 | str += len; |
1391 | bprm->p -= len; | |
1da177e4 LT |
1392 | |
1393 | while (len > 0) { | |
1da177e4 | 1394 | int offset, bytes_to_copy; |
1da177e4 | 1395 | |
114279be ON |
1396 | if (fatal_signal_pending(current)) { |
1397 | ret = -ERESTARTNOHAND; | |
1398 | goto out; | |
1399 | } | |
1400 | cond_resched(); | |
1401 | ||
1da177e4 | 1402 | offset = pos % PAGE_SIZE; |
b6a2fea3 OW |
1403 | if (offset == 0) |
1404 | offset = PAGE_SIZE; | |
1405 | ||
1406 | bytes_to_copy = offset; | |
1407 | if (bytes_to_copy > len) | |
1408 | bytes_to_copy = len; | |
1409 | ||
1410 | offset -= bytes_to_copy; | |
1411 | pos -= bytes_to_copy; | |
1412 | str -= bytes_to_copy; | |
1413 | len -= bytes_to_copy; | |
1414 | ||
1415 | if (!kmapped_page || kpos != (pos & PAGE_MASK)) { | |
1416 | struct page *page; | |
1417 | ||
114279be ON |
1418 | page = get_arg_page(bprm, pos, 1); |
1419 | if (!page) { | |
b6a2fea3 | 1420 | ret = -E2BIG; |
1da177e4 LT |
1421 | goto out; |
1422 | } | |
1da177e4 | 1423 | |
b6a2fea3 OW |
1424 | if (kmapped_page) { |
1425 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1426 | kunmap(kmapped_page); |
b6a2fea3 OW |
1427 | put_page(kmapped_page); |
1428 | } | |
1da177e4 LT |
1429 | kmapped_page = page; |
1430 | kaddr = kmap(kmapped_page); | |
b6a2fea3 OW |
1431 | kpos = pos & PAGE_MASK; |
1432 | flush_cache_page(bprm->vma, kpos, | |
1433 | page_to_pfn(kmapped_page)); | |
1da177e4 | 1434 | } |
b6a2fea3 OW |
1435 | if (copy_from_user(kaddr+offset, compat_ptr(str), |
1436 | bytes_to_copy)) { | |
1da177e4 LT |
1437 | ret = -EFAULT; |
1438 | goto out; | |
1439 | } | |
1da177e4 LT |
1440 | } |
1441 | } | |
1442 | ret = 0; | |
1443 | out: | |
b6a2fea3 OW |
1444 | if (kmapped_page) { |
1445 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1446 | kunmap(kmapped_page); |
b6a2fea3 | 1447 | put_page(kmapped_page); |
1da177e4 | 1448 | } |
b6a2fea3 | 1449 | return ret; |
1da177e4 LT |
1450 | } |
1451 | ||
1da177e4 LT |
1452 | /* |
1453 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1454 | * that it processes 32 bit argv and envp pointers. | |
1455 | */ | |
1456 | int compat_do_execve(char * filename, | |
1457 | compat_uptr_t __user *argv, | |
1458 | compat_uptr_t __user *envp, | |
1459 | struct pt_regs * regs) | |
1460 | { | |
1461 | struct linux_binprm *bprm; | |
1462 | struct file *file; | |
53e9309e | 1463 | struct files_struct *displaced; |
8c652f96 | 1464 | bool clear_in_exec; |
1da177e4 | 1465 | int retval; |
1da177e4 | 1466 | |
53e9309e HD |
1467 | retval = unshare_files(&displaced); |
1468 | if (retval) | |
1469 | goto out_ret; | |
1470 | ||
1da177e4 | 1471 | retval = -ENOMEM; |
11b0b5ab | 1472 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 | 1473 | if (!bprm) |
53e9309e | 1474 | goto out_files; |
1da177e4 | 1475 | |
a2a8474c ON |
1476 | retval = prepare_bprm_creds(bprm); |
1477 | if (retval) | |
a6f76f23 | 1478 | goto out_free; |
498052bb AV |
1479 | |
1480 | retval = check_unsafe_exec(bprm); | |
8c652f96 | 1481 | if (retval < 0) |
a2a8474c | 1482 | goto out_free; |
8c652f96 | 1483 | clear_in_exec = retval; |
a2a8474c | 1484 | current->in_execve = 1; |
a6f76f23 | 1485 | |
1da177e4 LT |
1486 | file = open_exec(filename); |
1487 | retval = PTR_ERR(file); | |
1488 | if (IS_ERR(file)) | |
498052bb | 1489 | goto out_unmark; |
1da177e4 LT |
1490 | |
1491 | sched_exec(); | |
1492 | ||
1da177e4 LT |
1493 | bprm->file = file; |
1494 | bprm->filename = filename; | |
1495 | bprm->interp = filename; | |
1da177e4 | 1496 | |
b6a2fea3 OW |
1497 | retval = bprm_mm_init(bprm); |
1498 | if (retval) | |
1499 | goto out_file; | |
1da177e4 | 1500 | |
b6a2fea3 | 1501 | bprm->argc = compat_count(argv, MAX_ARG_STRINGS); |
1da177e4 | 1502 | if ((retval = bprm->argc) < 0) |
a6f76f23 | 1503 | goto out; |
1da177e4 | 1504 | |
b6a2fea3 | 1505 | bprm->envc = compat_count(envp, MAX_ARG_STRINGS); |
1da177e4 | 1506 | if ((retval = bprm->envc) < 0) |
1da177e4 LT |
1507 | goto out; |
1508 | ||
1509 | retval = prepare_binprm(bprm); | |
1510 | if (retval < 0) | |
1511 | goto out; | |
1512 | ||
1513 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1514 | if (retval < 0) | |
1515 | goto out; | |
1516 | ||
1517 | bprm->exec = bprm->p; | |
1518 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1519 | if (retval < 0) | |
1520 | goto out; | |
1521 | ||
1522 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1523 | if (retval < 0) | |
1524 | goto out; | |
1525 | ||
1526 | retval = search_binary_handler(bprm, regs); | |
a6f76f23 DH |
1527 | if (retval < 0) |
1528 | goto out; | |
1da177e4 | 1529 | |
a6f76f23 | 1530 | /* execve succeeded */ |
498052bb | 1531 | current->fs->in_exec = 0; |
f9ce1f1c | 1532 | current->in_execve = 0; |
a6f76f23 DH |
1533 | acct_update_integrals(current); |
1534 | free_bprm(bprm); | |
53e9309e HD |
1535 | if (displaced) |
1536 | put_files_struct(displaced); | |
a6f76f23 | 1537 | return retval; |
1da177e4 | 1538 | |
a6f76f23 | 1539 | out: |
114279be ON |
1540 | if (bprm->mm) { |
1541 | acct_arg_size(bprm, 0); | |
b6a2fea3 | 1542 | mmput(bprm->mm); |
114279be | 1543 | } |
1da177e4 LT |
1544 | |
1545 | out_file: | |
1546 | if (bprm->file) { | |
1547 | allow_write_access(bprm->file); | |
1548 | fput(bprm->file); | |
1549 | } | |
1550 | ||
498052bb | 1551 | out_unmark: |
8c652f96 ON |
1552 | if (clear_in_exec) |
1553 | current->fs->in_exec = 0; | |
f9ce1f1c | 1554 | current->in_execve = 0; |
a6f76f23 DH |
1555 | |
1556 | out_free: | |
08a6fac1 | 1557 | free_bprm(bprm); |
1da177e4 | 1558 | |
53e9309e HD |
1559 | out_files: |
1560 | if (displaced) | |
1561 | reset_files_struct(displaced); | |
1da177e4 LT |
1562 | out_ret: |
1563 | return retval; | |
1564 | } | |
1565 | ||
1566 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1567 | ||
b773ad40 TG |
1568 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1569 | int timeval, int ret) | |
1570 | { | |
1571 | struct timespec ts; | |
1572 | ||
1573 | if (!p) | |
1574 | return ret; | |
1575 | ||
1576 | if (current->personality & STICKY_TIMEOUTS) | |
1577 | goto sticky; | |
1578 | ||
1579 | /* No update for zero timeout */ | |
1580 | if (!end_time->tv_sec && !end_time->tv_nsec) | |
1581 | return ret; | |
1582 | ||
1583 | ktime_get_ts(&ts); | |
1584 | ts = timespec_sub(*end_time, ts); | |
1585 | if (ts.tv_sec < 0) | |
1586 | ts.tv_sec = ts.tv_nsec = 0; | |
1587 | ||
1588 | if (timeval) { | |
1589 | struct compat_timeval rtv; | |
1590 | ||
1591 | rtv.tv_sec = ts.tv_sec; | |
1592 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
1593 | ||
1594 | if (!copy_to_user(p, &rtv, sizeof(rtv))) | |
1595 | return ret; | |
1596 | } else { | |
1597 | struct compat_timespec rts; | |
1598 | ||
1599 | rts.tv_sec = ts.tv_sec; | |
1600 | rts.tv_nsec = ts.tv_nsec; | |
1601 | ||
1602 | if (!copy_to_user(p, &rts, sizeof(rts))) | |
1603 | return ret; | |
1604 | } | |
1605 | /* | |
1606 | * If an application puts its timeval in read-only memory, we | |
1607 | * don't want the Linux-specific update to the timeval to | |
1608 | * cause a fault after the select has completed | |
1609 | * successfully. However, because we're not updating the | |
1610 | * timeval, we can't restart the system call. | |
1611 | */ | |
1612 | ||
1613 | sticky: | |
1614 | if (ret == -ERESTARTNOHAND) | |
1615 | ret = -EINTR; | |
1616 | return ret; | |
1617 | } | |
1618 | ||
1da177e4 LT |
1619 | /* |
1620 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1621 | * 64-bit unsigned longs. | |
1622 | */ | |
858119e1 | 1623 | static |
1da177e4 LT |
1624 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1625 | unsigned long *fdset) | |
1626 | { | |
022a1692 | 1627 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1628 | if (ufdset) { |
1629 | unsigned long odd; | |
1630 | ||
1631 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1632 | return -EFAULT; | |
1633 | ||
1634 | odd = nr & 1UL; | |
1635 | nr &= ~1UL; | |
1636 | while (nr) { | |
1637 | unsigned long h, l; | |
7116e994 HC |
1638 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1639 | return -EFAULT; | |
1da177e4 LT |
1640 | ufdset += 2; |
1641 | *fdset++ = h << 32 | l; | |
1642 | nr -= 2; | |
1643 | } | |
7116e994 HC |
1644 | if (odd && __get_user(*fdset, ufdset)) |
1645 | return -EFAULT; | |
1da177e4 LT |
1646 | } else { |
1647 | /* Tricky, must clear full unsigned long in the | |
1648 | * kernel fdset at the end, this makes sure that | |
1649 | * actually happens. | |
1650 | */ | |
1651 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1652 | } | |
1653 | return 0; | |
1654 | } | |
1655 | ||
858119e1 | 1656 | static |
7116e994 HC |
1657 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1658 | unsigned long *fdset) | |
1da177e4 LT |
1659 | { |
1660 | unsigned long odd; | |
022a1692 | 1661 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1662 | |
1663 | if (!ufdset) | |
7116e994 | 1664 | return 0; |
1da177e4 LT |
1665 | |
1666 | odd = nr & 1UL; | |
1667 | nr &= ~1UL; | |
1668 | while (nr) { | |
1669 | unsigned long h, l; | |
1670 | l = *fdset++; | |
1671 | h = l >> 32; | |
7116e994 HC |
1672 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1673 | return -EFAULT; | |
1da177e4 LT |
1674 | ufdset += 2; |
1675 | nr -= 2; | |
1676 | } | |
7116e994 HC |
1677 | if (odd && __put_user(*fdset, ufdset)) |
1678 | return -EFAULT; | |
1679 | return 0; | |
1da177e4 LT |
1680 | } |
1681 | ||
1682 | ||
1683 | /* | |
1684 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1685 | * should be compared to it from time to time | |
1686 | */ | |
1da177e4 LT |
1687 | |
1688 | /* | |
1689 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1690 | * like to be certain this leads to no problems. So I return | |
1691 | * EINTR just for safety. | |
1692 | * | |
1693 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1694 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1695 | */ | |
1696 | #define MAX_SELECT_SECONDS \ | |
1697 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1698 | ||
9f72949f | 1699 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e8 AV |
1700 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1701 | struct timespec *end_time) | |
1da177e4 LT |
1702 | { |
1703 | fd_set_bits fds; | |
6087b2da | 1704 | void *bits; |
bbea9f69 | 1705 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1706 | struct fdtable *fdt; |
6087b2da | 1707 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4 | 1708 | |
1da177e4 LT |
1709 | if (n < 0) |
1710 | goto out_nofds; | |
1711 | ||
bbea9f69 | 1712 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1713 | rcu_read_lock(); |
a4531edd | 1714 | fdt = files_fdtable(current->files); |
bbea9f69 | 1715 | max_fds = fdt->max_fds; |
ac5b8b6f | 1716 | rcu_read_unlock(); |
bbea9f69 VL |
1717 | if (n > max_fds) |
1718 | n = max_fds; | |
1da177e4 LT |
1719 | |
1720 | /* | |
1721 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1722 | * since we used fdset we need to allocate memory in units of | |
1723 | * long-words. | |
1724 | */ | |
1da177e4 | 1725 | size = FDS_BYTES(n); |
6087b2da BP |
1726 | bits = stack_fds; |
1727 | if (size > sizeof(stack_fds) / 6) { | |
1728 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1729 | ret = -ENOMEM; | |
1730 | if (!bits) | |
1731 | goto out_nofds; | |
1732 | } | |
1da177e4 LT |
1733 | fds.in = (unsigned long *) bits; |
1734 | fds.out = (unsigned long *) (bits + size); | |
1735 | fds.ex = (unsigned long *) (bits + 2*size); | |
1736 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1737 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1738 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1739 | ||
1740 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1741 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1742 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1743 | goto out; | |
1744 | zero_fd_set(n, fds.res_in); | |
1745 | zero_fd_set(n, fds.res_out); | |
1746 | zero_fd_set(n, fds.res_ex); | |
1747 | ||
8ff3e8e8 | 1748 | ret = do_select(n, &fds, end_time); |
1da177e4 LT |
1749 | |
1750 | if (ret < 0) | |
1751 | goto out; | |
1752 | if (!ret) { | |
1753 | ret = -ERESTARTNOHAND; | |
1754 | if (signal_pending(current)) | |
1755 | goto out; | |
1756 | ret = 0; | |
1757 | } | |
1758 | ||
7116e994 HC |
1759 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1760 | compat_set_fd_set(n, outp, fds.res_out) || | |
1761 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1762 | ret = -EFAULT; | |
1da177e4 | 1763 | out: |
6087b2da BP |
1764 | if (bits != stack_fds) |
1765 | kfree(bits); | |
1da177e4 LT |
1766 | out_nofds: |
1767 | return ret; | |
1768 | } | |
1769 | ||
9f72949f DW |
1770 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1771 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1772 | struct compat_timeval __user *tvp) | |
1773 | { | |
8ff3e8e8 | 1774 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1775 | struct compat_timeval tv; |
1776 | int ret; | |
1777 | ||
1778 | if (tvp) { | |
1779 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1780 | return -EFAULT; | |
1781 | ||
8ff3e8e8 | 1782 | to = &end_time; |
4d36a9e6 AV |
1783 | if (poll_select_set_timeout(to, |
1784 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), | |
1785 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) | |
9f72949f | 1786 | return -EINVAL; |
9f72949f DW |
1787 | } |
1788 | ||
8ff3e8e8 AV |
1789 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1790 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); | |
9f72949f DW |
1791 | |
1792 | return ret; | |
1793 | } | |
1794 | ||
5d0e5283 CH |
1795 | struct compat_sel_arg_struct { |
1796 | compat_ulong_t n; | |
1797 | compat_uptr_t inp; | |
1798 | compat_uptr_t outp; | |
1799 | compat_uptr_t exp; | |
1800 | compat_uptr_t tvp; | |
1801 | }; | |
1802 | ||
1803 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) | |
1804 | { | |
1805 | struct compat_sel_arg_struct a; | |
1806 | ||
1807 | if (copy_from_user(&a, arg, sizeof(a))) | |
1808 | return -EFAULT; | |
1809 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
1810 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
1811 | } | |
1812 | ||
f3de272b | 1813 | #ifdef HAVE_SET_RESTORE_SIGMASK |
c9da9f21 | 1814 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f DW |
1815 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1816 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1817 | compat_size_t sigsetsize) | |
1818 | { | |
1819 | compat_sigset_t ss32; | |
1820 | sigset_t ksigmask, sigsaved; | |
9f72949f | 1821 | struct compat_timespec ts; |
8ff3e8e8 | 1822 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1823 | int ret; |
1824 | ||
1825 | if (tsp) { | |
1826 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1827 | return -EFAULT; | |
1828 | ||
8ff3e8e8 AV |
1829 | to = &end_time; |
1830 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
9f72949f DW |
1831 | return -EINVAL; |
1832 | } | |
1833 | ||
1834 | if (sigmask) { | |
1835 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1836 | return -EINVAL; | |
1837 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1838 | return -EFAULT; | |
1839 | sigset_from_compat(&ksigmask, &ss32); | |
1840 | ||
1841 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1842 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1843 | } | |
1844 | ||
8ff3e8e8 AV |
1845 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1846 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); | |
9f72949f DW |
1847 | |
1848 | if (ret == -ERESTARTNOHAND) { | |
1849 | /* | |
1850 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1851 | * the signal on the way back to userspace, before the signal | |
1852 | * mask is restored. | |
1853 | */ | |
1854 | if (sigmask) { | |
1855 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1856 | sizeof(sigsaved)); | |
4e4c22c7 | 1857 | set_restore_sigmask(); |
9f72949f DW |
1858 | } |
1859 | } else if (sigmask) | |
1860 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1861 | ||
1862 | return ret; | |
1863 | } | |
1864 | ||
1865 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1866 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1867 | struct compat_timespec __user *tsp, void __user *sig) | |
1868 | { | |
1869 | compat_size_t sigsetsize = 0; | |
1870 | compat_uptr_t up = 0; | |
1871 | ||
1872 | if (sig) { | |
1873 | if (!access_ok(VERIFY_READ, sig, | |
1874 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1875 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1876 | __get_user(sigsetsize, | |
1877 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1878 | return -EFAULT; | |
1879 | } | |
c9da9f21 HC |
1880 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1881 | sigsetsize); | |
9f72949f DW |
1882 | } |
1883 | ||
1884 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1885 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1886 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1887 | { | |
1888 | compat_sigset_t ss32; | |
1889 | sigset_t ksigmask, sigsaved; | |
1890 | struct compat_timespec ts; | |
8ff3e8e8 | 1891 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1892 | int ret; |
1893 | ||
1894 | if (tsp) { | |
1895 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1896 | return -EFAULT; | |
1897 | ||
8ff3e8e8 AV |
1898 | to = &end_time; |
1899 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
1900 | return -EINVAL; | |
9f72949f DW |
1901 | } |
1902 | ||
1903 | if (sigmask) { | |
3835a9bd | 1904 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1905 | return -EINVAL; |
1906 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1907 | return -EFAULT; | |
1908 | sigset_from_compat(&ksigmask, &ss32); | |
1909 | ||
1910 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1911 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1912 | } | |
1913 | ||
8ff3e8e8 | 1914 | ret = do_sys_poll(ufds, nfds, to); |
9f72949f DW |
1915 | |
1916 | /* We can restart this syscall, usually */ | |
1917 | if (ret == -EINTR) { | |
1918 | /* | |
1919 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1920 | * the signal on the way back to userspace, before the signal | |
1921 | * mask is restored. | |
1922 | */ | |
1923 | if (sigmask) { | |
1924 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1925 | sizeof(sigsaved)); | |
4e4c22c7 | 1926 | set_restore_sigmask(); |
9f72949f DW |
1927 | } |
1928 | ret = -ERESTARTNOHAND; | |
1929 | } else if (sigmask) | |
1930 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1931 | ||
8ff3e8e8 | 1932 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f DW |
1933 | |
1934 | return ret; | |
1935 | } | |
f3de272b | 1936 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
9f72949f | 1937 | |
1e140567 | 1938 | #if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && !defined(CONFIG_NFSD_DEPRECATED) |
1da177e4 LT |
1939 | /* Stuff for NFS server syscalls... */ |
1940 | struct compat_nfsctl_svc { | |
1941 | u16 svc32_port; | |
1942 | s32 svc32_nthreads; | |
1943 | }; | |
1944 | ||
1945 | struct compat_nfsctl_client { | |
1946 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1947 | s32 cl32_naddr; | |
1948 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1949 | s32 cl32_fhkeytype; | |
1950 | s32 cl32_fhkeylen; | |
1951 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1952 | }; | |
1953 | ||
1954 | struct compat_nfsctl_export { | |
1955 | char ex32_client[NFSCLNT_IDMAX+1]; | |
1956 | char ex32_path[NFS_MAXPATHLEN+1]; | |
1957 | compat_dev_t ex32_dev; | |
1958 | compat_ino_t ex32_ino; | |
1959 | compat_int_t ex32_flags; | |
202e5979 SR |
1960 | __compat_uid_t ex32_anon_uid; |
1961 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
1962 | }; |
1963 | ||
1964 | struct compat_nfsctl_fdparm { | |
1965 | struct sockaddr gd32_addr; | |
1966 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1967 | compat_int_t gd32_version; | |
1968 | }; | |
1969 | ||
1970 | struct compat_nfsctl_fsparm { | |
1971 | struct sockaddr gd32_addr; | |
1972 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1973 | compat_int_t gd32_maxlen; | |
1974 | }; | |
1975 | ||
1976 | struct compat_nfsctl_arg { | |
1977 | compat_int_t ca32_version; /* safeguard */ | |
1978 | union { | |
1979 | struct compat_nfsctl_svc u32_svc; | |
1980 | struct compat_nfsctl_client u32_client; | |
1981 | struct compat_nfsctl_export u32_export; | |
1982 | struct compat_nfsctl_fdparm u32_getfd; | |
1983 | struct compat_nfsctl_fsparm u32_getfs; | |
1984 | } u; | |
1985 | #define ca32_svc u.u32_svc | |
1986 | #define ca32_client u.u32_client | |
1987 | #define ca32_export u.u32_export | |
1988 | #define ca32_getfd u.u32_getfd | |
1989 | #define ca32_getfs u.u32_getfs | |
1990 | }; | |
1991 | ||
1992 | union compat_nfsctl_res { | |
1993 | __u8 cr32_getfh[NFS_FHSIZE]; | |
1994 | struct knfsd_fh cr32_getfs; | |
1995 | }; | |
1996 | ||
d64b1c87 LFS |
1997 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
1998 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 1999 | { |
d64b1c87 LFS |
2000 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2001 | get_user(karg->ca_version, &arg->ca32_version) || | |
2002 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2003 | __get_user(karg->ca_svc.svc_nthreads, | |
2004 | &arg->ca32_svc.svc32_nthreads)) | |
2005 | return -EFAULT; | |
2006 | return 0; | |
1da177e4 LT |
2007 | } |
2008 | ||
d64b1c87 LFS |
2009 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2010 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2011 | { |
d64b1c87 LFS |
2012 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2013 | sizeof(arg->ca32_client)) || | |
2014 | get_user(karg->ca_version, &arg->ca32_version) || | |
2015 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2016 | &arg->ca32_client.cl32_ident[0], | |
2017 | NFSCLNT_IDMAX) || | |
2018 | __get_user(karg->ca_client.cl_naddr, | |
2019 | &arg->ca32_client.cl32_naddr) || | |
2020 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2021 | &arg->ca32_client.cl32_addrlist[0], | |
2022 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2023 | __get_user(karg->ca_client.cl_fhkeytype, | |
2024 | &arg->ca32_client.cl32_fhkeytype) || | |
2025 | __get_user(karg->ca_client.cl_fhkeylen, | |
2026 | &arg->ca32_client.cl32_fhkeylen) || | |
2027 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2028 | &arg->ca32_client.cl32_fhkey[0], | |
2029 | NFSCLNT_KEYMAX)) | |
2030 | return -EFAULT; | |
1da177e4 | 2031 | |
d64b1c87 | 2032 | return 0; |
1da177e4 LT |
2033 | } |
2034 | ||
d64b1c87 LFS |
2035 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2036 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2037 | { |
d64b1c87 LFS |
2038 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2039 | sizeof(arg->ca32_export)) || | |
2040 | get_user(karg->ca_version, &arg->ca32_version) || | |
2041 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2042 | &arg->ca32_export.ex32_client[0], | |
2043 | NFSCLNT_IDMAX) || | |
2044 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2045 | &arg->ca32_export.ex32_path[0], | |
2046 | NFS_MAXPATHLEN) || | |
2047 | __get_user(karg->ca_export.ex_dev, | |
2048 | &arg->ca32_export.ex32_dev) || | |
2049 | __get_user(karg->ca_export.ex_ino, | |
2050 | &arg->ca32_export.ex32_ino) || | |
2051 | __get_user(karg->ca_export.ex_flags, | |
2052 | &arg->ca32_export.ex32_flags) || | |
2053 | __get_user(karg->ca_export.ex_anon_uid, | |
2054 | &arg->ca32_export.ex32_anon_uid) || | |
2055 | __get_user(karg->ca_export.ex_anon_gid, | |
2056 | &arg->ca32_export.ex32_anon_gid)) | |
2057 | return -EFAULT; | |
1da177e4 LT |
2058 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2059 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2060 | ||
d64b1c87 | 2061 | return 0; |
1da177e4 LT |
2062 | } |
2063 | ||
d64b1c87 LFS |
2064 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2065 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2066 | { |
d64b1c87 LFS |
2067 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2068 | sizeof(arg->ca32_getfd)) || | |
2069 | get_user(karg->ca_version, &arg->ca32_version) || | |
2070 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2071 | &arg->ca32_getfd.gd32_addr, | |
2072 | (sizeof(struct sockaddr))) || | |
2073 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2074 | &arg->ca32_getfd.gd32_path, | |
2075 | (NFS_MAXPATHLEN+1)) || | |
2076 | __get_user(karg->ca_getfd.gd_version, | |
2077 | &arg->ca32_getfd.gd32_version)) | |
2078 | return -EFAULT; | |
1da177e4 | 2079 | |
d64b1c87 | 2080 | return 0; |
1da177e4 LT |
2081 | } |
2082 | ||
d64b1c87 LFS |
2083 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2084 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2085 | { |
d64b1c87 LFS |
2086 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2087 | get_user(karg->ca_version, &arg->ca32_version) || | |
2088 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2089 | &arg->ca32_getfs.gd32_addr, | |
2090 | (sizeof(struct sockaddr))) || | |
2091 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2092 | &arg->ca32_getfs.gd32_path, | |
2093 | (NFS_MAXPATHLEN+1)) || | |
2094 | __get_user(karg->ca_getfs.gd_maxlen, | |
2095 | &arg->ca32_getfs.gd32_maxlen)) | |
2096 | return -EFAULT; | |
1da177e4 | 2097 | |
d64b1c87 | 2098 | return 0; |
1da177e4 LT |
2099 | } |
2100 | ||
2101 | /* This really doesn't need translations, we are only passing | |
2102 | * back a union which contains opaque nfs file handle data. | |
2103 | */ | |
d64b1c87 LFS |
2104 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2105 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2106 | { |
2107 | int err; | |
2108 | ||
2109 | err = copy_to_user(res, kres, sizeof(*res)); | |
2110 | ||
2111 | return (err) ? -EFAULT : 0; | |
2112 | } | |
2113 | ||
d64b1c87 LFS |
2114 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2115 | struct compat_nfsctl_arg __user *arg, | |
2116 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2117 | { |
2118 | struct nfsctl_arg *karg; | |
2119 | union nfsctl_res *kres; | |
2120 | mm_segment_t oldfs; | |
2121 | int err; | |
2122 | ||
2123 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2124 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2125 | if(!karg || !kres) { | |
2126 | err = -ENOMEM; | |
2127 | goto done; | |
2128 | } | |
2129 | ||
2130 | switch(cmd) { | |
2131 | case NFSCTL_SVC: | |
2132 | err = compat_nfs_svc_trans(karg, arg); | |
2133 | break; | |
2134 | ||
2135 | case NFSCTL_ADDCLIENT: | |
2136 | err = compat_nfs_clnt_trans(karg, arg); | |
2137 | break; | |
2138 | ||
2139 | case NFSCTL_DELCLIENT: | |
2140 | err = compat_nfs_clnt_trans(karg, arg); | |
2141 | break; | |
2142 | ||
2143 | case NFSCTL_EXPORT: | |
2144 | case NFSCTL_UNEXPORT: | |
2145 | err = compat_nfs_exp_trans(karg, arg); | |
2146 | break; | |
2147 | ||
2148 | case NFSCTL_GETFD: | |
2149 | err = compat_nfs_getfd_trans(karg, arg); | |
2150 | break; | |
2151 | ||
2152 | case NFSCTL_GETFS: | |
2153 | err = compat_nfs_getfs_trans(karg, arg); | |
2154 | break; | |
2155 | ||
2156 | default: | |
2157 | err = -EINVAL; | |
57070d01 | 2158 | break; |
1da177e4 LT |
2159 | } |
2160 | ||
57070d01 PS |
2161 | if (err) |
2162 | goto done; | |
2163 | ||
1da177e4 LT |
2164 | oldfs = get_fs(); |
2165 | set_fs(KERNEL_DS); | |
2166 | /* The __user pointer casts are valid because of the set_fs() */ | |
2167 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2168 | set_fs(oldfs); | |
2169 | ||
2170 | if (err) | |
2171 | goto done; | |
2172 | ||
2173 | if((cmd == NFSCTL_GETFD) || | |
2174 | (cmd == NFSCTL_GETFS)) | |
2175 | err = compat_nfs_getfh_res_trans(kres, res); | |
2176 | ||
2177 | done: | |
2178 | kfree(karg); | |
2179 | kfree(kres); | |
2180 | return err; | |
2181 | } | |
2182 | #else /* !NFSD */ | |
2183 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2184 | { | |
2185 | return sys_ni_syscall(); | |
2186 | } | |
2187 | #endif | |
f6dfb4fd DL |
2188 | |
2189 | #ifdef CONFIG_EPOLL | |
2190 | ||
f3de272b | 2191 | #ifdef HAVE_SET_RESTORE_SIGMASK |
f6dfb4fd DL |
2192 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
2193 | struct compat_epoll_event __user *events, | |
2194 | int maxevents, int timeout, | |
2195 | const compat_sigset_t __user *sigmask, | |
2196 | compat_size_t sigsetsize) | |
2197 | { | |
2198 | long err; | |
2199 | compat_sigset_t csigmask; | |
2200 | sigset_t ksigmask, sigsaved; | |
2201 | ||
2202 | /* | |
2203 | * If the caller wants a certain signal mask to be set during the wait, | |
2204 | * we apply it here. | |
2205 | */ | |
2206 | if (sigmask) { | |
2207 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2208 | return -EINVAL; | |
2209 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2210 | return -EFAULT; | |
2211 | sigset_from_compat(&ksigmask, &csigmask); | |
2212 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2213 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2214 | } | |
2215 | ||
f6dfb4fd | 2216 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
f6dfb4fd DL |
2217 | |
2218 | /* | |
2219 | * If we changed the signal mask, we need to restore the original one. | |
2220 | * In case we've got a signal while waiting, we do not restore the | |
2221 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2222 | * the way back to userspace, before the signal mask is restored. | |
2223 | */ | |
2224 | if (sigmask) { | |
2225 | if (err == -EINTR) { | |
2226 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2227 | sizeof(sigsaved)); | |
4e4c22c7 | 2228 | set_restore_sigmask(); |
f6dfb4fd DL |
2229 | } else |
2230 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2231 | } | |
2232 | ||
2233 | return err; | |
2234 | } | |
f3de272b | 2235 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
f6dfb4fd DL |
2236 | |
2237 | #endif /* CONFIG_EPOLL */ | |
6d18c922 DL |
2238 | |
2239 | #ifdef CONFIG_SIGNALFD | |
2240 | ||
9deb27ba UD |
2241 | asmlinkage long compat_sys_signalfd4(int ufd, |
2242 | const compat_sigset_t __user *sigmask, | |
2243 | compat_size_t sigsetsize, int flags) | |
6d18c922 DL |
2244 | { |
2245 | compat_sigset_t ss32; | |
2246 | sigset_t tmp; | |
2247 | sigset_t __user *ksigmask; | |
2248 | ||
2249 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2250 | return -EINVAL; | |
2251 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
2252 | return -EFAULT; | |
2253 | sigset_from_compat(&tmp, &ss32); | |
2254 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); | |
2255 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) | |
2256 | return -EFAULT; | |
2257 | ||
9deb27ba | 2258 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
6d18c922 DL |
2259 | } |
2260 | ||
9deb27ba UD |
2261 | asmlinkage long compat_sys_signalfd(int ufd, |
2262 | const compat_sigset_t __user *sigmask, | |
2263 | compat_size_t sigsetsize) | |
2264 | { | |
2265 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); | |
2266 | } | |
6d18c922 DL |
2267 | #endif /* CONFIG_SIGNALFD */ |
2268 | ||
83f5d126 DL |
2269 | #ifdef CONFIG_TIMERFD |
2270 | ||
4d672e7a DL |
2271 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
2272 | const struct compat_itimerspec __user *utmr, | |
2273 | struct compat_itimerspec __user *otmr) | |
83f5d126 | 2274 | { |
4d672e7a | 2275 | int error; |
83f5d126 DL |
2276 | struct itimerspec t; |
2277 | struct itimerspec __user *ut; | |
2278 | ||
83f5d126 | 2279 | if (get_compat_itimerspec(&t, utmr)) |
8317f14b | 2280 | return -EFAULT; |
4d672e7a DL |
2281 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
2282 | if (copy_to_user(&ut[0], &t, sizeof(t))) | |
8317f14b | 2283 | return -EFAULT; |
4d672e7a DL |
2284 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
2285 | if (!error && otmr) | |
2286 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || | |
2287 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2288 | ||
2289 | return error; | |
2290 | } | |
2291 | ||
2292 | asmlinkage long compat_sys_timerfd_gettime(int ufd, | |
2293 | struct compat_itimerspec __user *otmr) | |
2294 | { | |
2295 | int error; | |
2296 | struct itimerspec t; | |
2297 | struct itimerspec __user *ut; | |
83f5d126 | 2298 | |
4d672e7a DL |
2299 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
2300 | error = sys_timerfd_gettime(ufd, ut); | |
2301 | if (!error) | |
2302 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || | |
2303 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2304 | ||
2305 | return error; | |
83f5d126 DL |
2306 | } |
2307 | ||
2308 | #endif /* CONFIG_TIMERFD */ |