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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 | |
11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) | |
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 | ||
022a1692 | 18 | #include <linux/kernel.h> |
1da177e4 LT |
19 | #include <linux/linkage.h> |
20 | #include <linux/compat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/time.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/fcntl.h> | |
25 | #include <linux/namei.h> | |
26 | #include <linux/file.h> | |
9f3acc31 | 27 | #include <linux/fdtable.h> |
1da177e4 | 28 | #include <linux/vfs.h> |
1da177e4 LT |
29 | #include <linux/ioctl.h> |
30 | #include <linux/init.h> | |
1da177e4 LT |
31 | #include <linux/smb.h> |
32 | #include <linux/smb_mount.h> | |
33 | #include <linux/ncp_mount.h> | |
9a9947bf | 34 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
35 | #include <linux/syscalls.h> |
36 | #include <linux/ctype.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/dirent.h> | |
0eeca283 | 39 | #include <linux/fsnotify.h> |
1da177e4 LT |
40 | #include <linux/highuid.h> |
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/syscall.h> | |
44 | #include <linux/personality.h> | |
45 | #include <linux/rwsem.h> | |
8f0ab514 | 46 | #include <linux/tsacct_kern.h> |
6272e266 | 47 | #include <linux/security.h> |
a1f8e7f7 | 48 | #include <linux/highmem.h> |
6d18c922 | 49 | #include <linux/signal.h> |
bd01f843 | 50 | #include <linux/poll.h> |
4a805e86 | 51 | #include <linux/mm.h> |
f6dfb4fd | 52 | #include <linux/eventpoll.h> |
498052bb | 53 | #include <linux/fs_struct.h> |
1da177e4 | 54 | |
1da177e4 LT |
55 | #include <asm/uaccess.h> |
56 | #include <asm/mmu_context.h> | |
57 | #include <asm/ioctls.h> | |
07f3f05c | 58 | #include "internal.h" |
9f72949f | 59 | |
bebfa101 AK |
60 | int compat_log = 1; |
61 | ||
62 | int compat_printk(const char *fmt, ...) | |
63 | { | |
64 | va_list ap; | |
65 | int ret; | |
66 | if (!compat_log) | |
67 | return 0; | |
68 | va_start(ap, fmt); | |
69 | ret = vprintk(fmt, ap); | |
70 | va_end(ap); | |
71 | return ret; | |
72 | } | |
73 | ||
ee0b3e67 BP |
74 | #include "read_write.h" |
75 | ||
1da177e4 LT |
76 | /* |
77 | * Not all architectures have sys_utime, so implement this in terms | |
78 | * of sys_utimes. | |
79 | */ | |
80 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
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 | ||
94 | asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags) | |
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 | ||
9ad11ab4 | 109 | asmlinkage long compat_sys_futimesat(unsigned int dfd, 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 | ||
128 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
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 | ||
1da177e4 LT |
172 | asmlinkage long compat_sys_newstat(char __user * filename, |
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 | ||
184 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
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 |
9ad11ab4 | 197 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
198 | struct compat_stat __user *statbuf, int flag) |
199 | { | |
200 | struct kstat stat; | |
0112fc22 | 201 | int error; |
5590ff0d | 202 | |
0112fc22 OD |
203 | error = vfs_fstatat(dfd, filename, &stat, flag); |
204 | if (error) | |
205 | return error; | |
206 | return cp_compat_stat(&stat, statbuf); | |
5590ff0d | 207 | } |
82d821dd | 208 | #endif |
5590ff0d | 209 | |
1da177e4 LT |
210 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
211 | struct compat_stat __user * statbuf) | |
212 | { | |
213 | struct kstat stat; | |
214 | int error = vfs_fstat(fd, &stat); | |
215 | ||
216 | if (!error) | |
217 | error = cp_compat_stat(&stat, statbuf); | |
218 | return error; | |
219 | } | |
220 | ||
221 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
222 | { | |
223 | ||
224 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
225 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
226 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
227 | return -EOVERFLOW; |
228 | /* f_files and f_ffree may be -1; it's okay | |
229 | * to stuff that into 32 bits */ | |
230 | if (kbuf->f_files != 0xffffffffffffffffULL | |
231 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
232 | return -EOVERFLOW; | |
233 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
234 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
235 | return -EOVERFLOW; | |
236 | } | |
237 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
238 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
239 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
240 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
241 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
242 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
243 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
244 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
245 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
246 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
247 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
248 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
249 | __put_user(0, &ubuf->f_spare[0]) || | |
250 | __put_user(0, &ubuf->f_spare[1]) || | |
251 | __put_user(0, &ubuf->f_spare[2]) || | |
252 | __put_user(0, &ubuf->f_spare[3]) || | |
253 | __put_user(0, &ubuf->f_spare[4])) | |
254 | return -EFAULT; | |
255 | return 0; | |
256 | } | |
257 | ||
258 | /* | |
259 | * The following statfs calls are copies of code from fs/open.c and | |
260 | * should be checked against those from time to time | |
261 | */ | |
2d8f3038 | 262 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
1da177e4 | 263 | { |
2d8f3038 | 264 | struct path path; |
1da177e4 LT |
265 | int error; |
266 | ||
2d8f3038 | 267 | error = user_path(pathname, &path); |
1da177e4 LT |
268 | if (!error) { |
269 | struct kstatfs tmp; | |
2d8f3038 | 270 | error = vfs_statfs(path.dentry, &tmp); |
86e07ce7 DG |
271 | if (!error) |
272 | error = put_compat_statfs(buf, &tmp); | |
2d8f3038 | 273 | path_put(&path); |
1da177e4 LT |
274 | } |
275 | return error; | |
276 | } | |
277 | ||
278 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
279 | { | |
280 | struct file * file; | |
281 | struct kstatfs tmp; | |
282 | int error; | |
283 | ||
284 | error = -EBADF; | |
285 | file = fget(fd); | |
286 | if (!file) | |
287 | goto out; | |
0f7fc9e4 | 288 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
289 | if (!error) |
290 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
291 | fput(file); |
292 | out: | |
293 | return error; | |
294 | } | |
295 | ||
296 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
297 | { | |
298 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
299 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
300 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
301 | return -EOVERFLOW; |
302 | /* f_files and f_ffree may be -1; it's okay | |
303 | * to stuff that into 32 bits */ | |
304 | if (kbuf->f_files != 0xffffffffffffffffULL | |
305 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
306 | return -EOVERFLOW; | |
307 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
308 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
309 | return -EOVERFLOW; | |
310 | } | |
311 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
312 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
313 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
314 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
315 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
316 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
317 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
318 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
319 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
320 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
321 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
322 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
323 | return -EFAULT; | |
324 | return 0; | |
325 | } | |
326 | ||
2d8f3038 | 327 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
1da177e4 | 328 | { |
2d8f3038 | 329 | struct path path; |
1da177e4 LT |
330 | int error; |
331 | ||
332 | if (sz != sizeof(*buf)) | |
333 | return -EINVAL; | |
334 | ||
2d8f3038 | 335 | error = user_path(pathname, &path); |
1da177e4 LT |
336 | if (!error) { |
337 | struct kstatfs tmp; | |
2d8f3038 | 338 | error = vfs_statfs(path.dentry, &tmp); |
86e07ce7 DG |
339 | if (!error) |
340 | error = put_compat_statfs64(buf, &tmp); | |
2d8f3038 | 341 | path_put(&path); |
1da177e4 LT |
342 | } |
343 | return error; | |
344 | } | |
345 | ||
346 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
347 | { | |
348 | struct file * file; | |
349 | struct kstatfs tmp; | |
350 | int error; | |
351 | ||
352 | if (sz != sizeof(*buf)) | |
353 | return -EINVAL; | |
354 | ||
355 | error = -EBADF; | |
356 | file = fget(fd); | |
357 | if (!file) | |
358 | goto out; | |
0f7fc9e4 | 359 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
360 | if (!error) |
361 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
362 | fput(file); |
363 | out: | |
364 | return error; | |
365 | } | |
366 | ||
2b1c6bd7 CH |
367 | /* |
368 | * This is a copy of sys_ustat, just dealing with a structure layout. | |
369 | * Given how simple this syscall is that apporach is more maintainable | |
370 | * than the various conversion hacks. | |
371 | */ | |
372 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) | |
373 | { | |
374 | struct super_block *sb; | |
375 | struct compat_ustat tmp; | |
376 | struct kstatfs sbuf; | |
377 | int err; | |
378 | ||
379 | sb = user_get_super(new_decode_dev(dev)); | |
380 | if (!sb) | |
381 | return -EINVAL; | |
382 | err = vfs_statfs(sb->s_root, &sbuf); | |
383 | drop_super(sb); | |
384 | if (err) | |
385 | return err; | |
386 | ||
387 | memset(&tmp, 0, sizeof(struct compat_ustat)); | |
388 | tmp.f_tfree = sbuf.f_bfree; | |
389 | tmp.f_tinode = sbuf.f_ffree; | |
390 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) | |
391 | return -EFAULT; | |
392 | return 0; | |
393 | } | |
394 | ||
1da177e4 LT |
395 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
396 | { | |
397 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
398 | __get_user(kfl->l_type, &ufl->l_type) || | |
399 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
400 | __get_user(kfl->l_start, &ufl->l_start) || | |
401 | __get_user(kfl->l_len, &ufl->l_len) || | |
402 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
403 | return -EFAULT; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
408 | { | |
409 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
410 | __put_user(kfl->l_type, &ufl->l_type) || | |
411 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
412 | __put_user(kfl->l_start, &ufl->l_start) || | |
413 | __put_user(kfl->l_len, &ufl->l_len) || | |
414 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
415 | return -EFAULT; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
420 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
421 | { | |
422 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
423 | __get_user(kfl->l_type, &ufl->l_type) || | |
424 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
425 | __get_user(kfl->l_start, &ufl->l_start) || | |
426 | __get_user(kfl->l_len, &ufl->l_len) || | |
427 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
428 | return -EFAULT; | |
429 | return 0; | |
430 | } | |
431 | #endif | |
432 | ||
433 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
434 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
435 | { | |
436 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
437 | __put_user(kfl->l_type, &ufl->l_type) || | |
438 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
439 | __put_user(kfl->l_start, &ufl->l_start) || | |
440 | __put_user(kfl->l_len, &ufl->l_len) || | |
441 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
442 | return -EFAULT; | |
443 | return 0; | |
444 | } | |
445 | #endif | |
446 | ||
447 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
448 | unsigned long arg) | |
449 | { | |
450 | mm_segment_t old_fs; | |
451 | struct flock f; | |
452 | long ret; | |
453 | ||
454 | switch (cmd) { | |
455 | case F_GETLK: | |
456 | case F_SETLK: | |
457 | case F_SETLKW: | |
458 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
459 | if (ret != 0) | |
460 | break; | |
461 | old_fs = get_fs(); | |
462 | set_fs(KERNEL_DS); | |
463 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
464 | set_fs(old_fs); | |
465 | if (cmd == F_GETLK && ret == 0) { | |
ff677f8d | 466 | /* GETLK was successful and we need to return the data... |
2520f14c N |
467 | * but it needs to fit in the compat structure. |
468 | * l_start shouldn't be too big, unless the original | |
469 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
470 | * case the app was asking for trouble, so we return | |
471 | * -EOVERFLOW in that case. | |
472 | * l_len could be too big, in which case we just truncate it, | |
473 | * and only allow the app to see that part of the conflicting | |
474 | * lock that might make sense to it anyway | |
475 | */ | |
476 | ||
477 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 478 | ret = -EOVERFLOW; |
2520f14c N |
479 | if (f.l_len > COMPAT_OFF_T_MAX) |
480 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
481 | if (ret == 0) |
482 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
483 | } | |
484 | break; | |
485 | ||
486 | case F_GETLK64: | |
487 | case F_SETLK64: | |
488 | case F_SETLKW64: | |
489 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
490 | if (ret != 0) | |
491 | break; | |
492 | old_fs = get_fs(); | |
493 | set_fs(KERNEL_DS); | |
494 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
495 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
496 | (unsigned long)&f); | |
497 | set_fs(old_fs); | |
498 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
499 | /* need to return lock information - see above for commentary */ |
500 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 501 | ret = -EOVERFLOW; |
2520f14c N |
502 | if (f.l_len > COMPAT_LOFF_T_MAX) |
503 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
504 | if (ret == 0) |
505 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
506 | } | |
507 | break; | |
508 | ||
509 | default: | |
510 | ret = sys_fcntl(fd, cmd, arg); | |
511 | break; | |
512 | } | |
513 | return ret; | |
514 | } | |
515 | ||
516 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
517 | unsigned long arg) | |
518 | { | |
519 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
520 | return -EINVAL; | |
521 | return compat_sys_fcntl64(fd, cmd, arg); | |
522 | } | |
523 | ||
524 | asmlinkage long | |
525 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
526 | { | |
527 | long ret; | |
528 | aio_context_t ctx64; | |
529 | ||
530 | mm_segment_t oldfs = get_fs(); | |
531 | if (unlikely(get_user(ctx64, ctx32p))) | |
532 | return -EFAULT; | |
533 | ||
534 | set_fs(KERNEL_DS); | |
535 | /* The __user pointer cast is valid because of the set_fs() */ | |
536 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
537 | set_fs(oldfs); | |
538 | /* truncating is ok because it's a user address */ | |
539 | if (!ret) | |
540 | ret = put_user((u32) ctx64, ctx32p); | |
541 | return ret; | |
542 | } | |
543 | ||
544 | asmlinkage long | |
545 | compat_sys_io_getevents(aio_context_t ctx_id, | |
546 | unsigned long min_nr, | |
547 | unsigned long nr, | |
548 | struct io_event __user *events, | |
549 | struct compat_timespec __user *timeout) | |
550 | { | |
551 | long ret; | |
552 | struct timespec t; | |
553 | struct timespec __user *ut = NULL; | |
554 | ||
555 | ret = -EFAULT; | |
556 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
557 | nr * sizeof(struct io_event)))) | |
558 | goto out; | |
559 | if (timeout) { | |
560 | if (get_compat_timespec(&t, timeout)) | |
561 | goto out; | |
562 | ||
563 | ut = compat_alloc_user_space(sizeof(*ut)); | |
564 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
565 | goto out; | |
566 | } | |
567 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
568 | out: | |
569 | return ret; | |
570 | } | |
571 | ||
572 | static inline long | |
573 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
574 | { | |
575 | compat_uptr_t uptr; | |
576 | int i; | |
577 | ||
578 | for (i = 0; i < nr; ++i) { | |
579 | if (get_user(uptr, ptr32 + i)) | |
580 | return -EFAULT; | |
581 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
582 | return -EFAULT; | |
583 | } | |
584 | return 0; | |
585 | } | |
586 | ||
587 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
588 | ||
589 | asmlinkage long | |
590 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
591 | { | |
592 | struct iocb __user * __user *iocb64; | |
593 | long ret; | |
594 | ||
595 | if (unlikely(nr < 0)) | |
596 | return -EINVAL; | |
597 | ||
598 | if (nr > MAX_AIO_SUBMITS) | |
599 | nr = MAX_AIO_SUBMITS; | |
600 | ||
601 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
602 | ret = copy_iocb(nr, iocb, iocb64); | |
603 | if (!ret) | |
604 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
605 | return ret; | |
606 | } | |
607 | ||
608 | struct compat_ncp_mount_data { | |
609 | compat_int_t version; | |
610 | compat_uint_t ncp_fd; | |
202e5979 | 611 | __compat_uid_t mounted_uid; |
1da177e4 LT |
612 | compat_pid_t wdog_pid; |
613 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
614 | compat_uint_t time_out; | |
615 | compat_uint_t retry_count; | |
616 | compat_uint_t flags; | |
202e5979 SR |
617 | __compat_uid_t uid; |
618 | __compat_gid_t gid; | |
1da177e4 LT |
619 | compat_mode_t file_mode; |
620 | compat_mode_t dir_mode; | |
621 | }; | |
622 | ||
623 | struct compat_ncp_mount_data_v4 { | |
624 | compat_int_t version; | |
625 | compat_ulong_t flags; | |
626 | compat_ulong_t mounted_uid; | |
627 | compat_long_t wdog_pid; | |
628 | compat_uint_t ncp_fd; | |
629 | compat_uint_t time_out; | |
630 | compat_uint_t retry_count; | |
631 | compat_ulong_t uid; | |
632 | compat_ulong_t gid; | |
633 | compat_ulong_t file_mode; | |
634 | compat_ulong_t dir_mode; | |
635 | }; | |
636 | ||
637 | static void *do_ncp_super_data_conv(void *raw_data) | |
638 | { | |
639 | int version = *(unsigned int *)raw_data; | |
640 | ||
641 | if (version == 3) { | |
642 | struct compat_ncp_mount_data *c_n = raw_data; | |
643 | struct ncp_mount_data *n = raw_data; | |
644 | ||
645 | n->dir_mode = c_n->dir_mode; | |
646 | n->file_mode = c_n->file_mode; | |
647 | n->gid = c_n->gid; | |
648 | n->uid = c_n->uid; | |
649 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
650 | n->wdog_pid = c_n->wdog_pid; | |
651 | n->mounted_uid = c_n->mounted_uid; | |
652 | } else if (version == 4) { | |
653 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
654 | struct ncp_mount_data_v4 *n = raw_data; | |
655 | ||
656 | n->dir_mode = c_n->dir_mode; | |
657 | n->file_mode = c_n->file_mode; | |
658 | n->gid = c_n->gid; | |
659 | n->uid = c_n->uid; | |
660 | n->retry_count = c_n->retry_count; | |
661 | n->time_out = c_n->time_out; | |
662 | n->ncp_fd = c_n->ncp_fd; | |
663 | n->wdog_pid = c_n->wdog_pid; | |
664 | n->mounted_uid = c_n->mounted_uid; | |
665 | n->flags = c_n->flags; | |
666 | } else if (version != 5) { | |
667 | return NULL; | |
668 | } | |
669 | ||
670 | return raw_data; | |
671 | } | |
672 | ||
673 | struct compat_smb_mount_data { | |
674 | compat_int_t version; | |
202e5979 SR |
675 | __compat_uid_t mounted_uid; |
676 | __compat_uid_t uid; | |
677 | __compat_gid_t gid; | |
1da177e4 LT |
678 | compat_mode_t file_mode; |
679 | compat_mode_t dir_mode; | |
680 | }; | |
681 | ||
682 | static void *do_smb_super_data_conv(void *raw_data) | |
683 | { | |
684 | struct smb_mount_data *s = raw_data; | |
685 | struct compat_smb_mount_data *c_s = raw_data; | |
686 | ||
687 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
688 | goto out; | |
689 | s->dir_mode = c_s->dir_mode; | |
690 | s->file_mode = c_s->file_mode; | |
691 | s->gid = c_s->gid; | |
692 | s->uid = c_s->uid; | |
693 | s->mounted_uid = c_s->mounted_uid; | |
694 | out: | |
695 | return raw_data; | |
696 | } | |
697 | ||
9a9947bf DH |
698 | struct compat_nfs_string { |
699 | compat_uint_t len; | |
5fc3e624 | 700 | compat_uptr_t data; |
9a9947bf DH |
701 | }; |
702 | ||
703 | static inline void compat_nfs_string(struct nfs_string *dst, | |
704 | struct compat_nfs_string *src) | |
705 | { | |
706 | dst->data = compat_ptr(src->data); | |
707 | dst->len = src->len; | |
708 | } | |
709 | ||
710 | struct compat_nfs4_mount_data_v1 { | |
711 | compat_int_t version; | |
712 | compat_int_t flags; | |
713 | compat_int_t rsize; | |
714 | compat_int_t wsize; | |
715 | compat_int_t timeo; | |
716 | compat_int_t retrans; | |
717 | compat_int_t acregmin; | |
718 | compat_int_t acregmax; | |
719 | compat_int_t acdirmin; | |
720 | compat_int_t acdirmax; | |
721 | struct compat_nfs_string client_addr; | |
722 | struct compat_nfs_string mnt_path; | |
723 | struct compat_nfs_string hostname; | |
724 | compat_uint_t host_addrlen; | |
5fc3e624 | 725 | compat_uptr_t host_addr; |
9a9947bf DH |
726 | compat_int_t proto; |
727 | compat_int_t auth_flavourlen; | |
5fc3e624 | 728 | compat_uptr_t auth_flavours; |
9a9947bf DH |
729 | }; |
730 | ||
731 | static int do_nfs4_super_data_conv(void *raw_data) | |
732 | { | |
733 | int version = *(compat_uint_t *) raw_data; | |
734 | ||
735 | if (version == 1) { | |
736 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
737 | struct nfs4_mount_data *real = raw_data; | |
738 | ||
739 | /* copy the fields backwards */ | |
740 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
741 | real->auth_flavourlen = raw->auth_flavourlen; | |
742 | real->proto = raw->proto; | |
743 | real->host_addr = compat_ptr(raw->host_addr); | |
744 | real->host_addrlen = raw->host_addrlen; | |
745 | compat_nfs_string(&real->hostname, &raw->hostname); | |
746 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
747 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
748 | real->acdirmax = raw->acdirmax; | |
749 | real->acdirmin = raw->acdirmin; | |
750 | real->acregmax = raw->acregmax; | |
751 | real->acregmin = raw->acregmin; | |
752 | real->retrans = raw->retrans; | |
753 | real->timeo = raw->timeo; | |
754 | real->wsize = raw->wsize; | |
755 | real->rsize = raw->rsize; | |
756 | real->flags = raw->flags; | |
757 | real->version = raw->version; | |
758 | } | |
9a9947bf DH |
759 | |
760 | return 0; | |
761 | } | |
762 | ||
1da177e4 LT |
763 | #define SMBFS_NAME "smbfs" |
764 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 765 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
766 | |
767 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
768 | char __user * type, unsigned long flags, | |
769 | void __user * data) | |
770 | { | |
eca6f534 | 771 | char *kernel_type; |
1da177e4 | 772 | unsigned long data_page; |
eca6f534 | 773 | char *kernel_dev; |
1da177e4 LT |
774 | char *dir_page; |
775 | int retval; | |
776 | ||
eca6f534 | 777 | retval = copy_mount_string(type, &kernel_type); |
1da177e4 LT |
778 | if (retval < 0) |
779 | goto out; | |
780 | ||
781 | dir_page = getname(dir_name); | |
782 | retval = PTR_ERR(dir_page); | |
783 | if (IS_ERR(dir_page)) | |
784 | goto out1; | |
785 | ||
eca6f534 | 786 | retval = copy_mount_string(dev_name, &kernel_dev); |
1da177e4 LT |
787 | if (retval < 0) |
788 | goto out2; | |
789 | ||
eca6f534 | 790 | retval = copy_mount_options(data, &data_page); |
1da177e4 LT |
791 | if (retval < 0) |
792 | goto out3; | |
793 | ||
794 | retval = -EINVAL; | |
795 | ||
eca6f534 VN |
796 | if (kernel_type && data_page) { |
797 | if (!strcmp(kernel_type, SMBFS_NAME)) { | |
1da177e4 | 798 | do_smb_super_data_conv((void *)data_page); |
eca6f534 | 799 | } else if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4 | 800 | do_ncp_super_data_conv((void *)data_page); |
eca6f534 | 801 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf DH |
802 | if (do_nfs4_super_data_conv((void *) data_page)) |
803 | goto out4; | |
1da177e4 LT |
804 | } |
805 | } | |
806 | ||
eca6f534 | 807 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
1da177e4 | 808 | flags, (void*)data_page); |
1da177e4 | 809 | |
9a9947bf | 810 | out4: |
1da177e4 LT |
811 | free_page(data_page); |
812 | out3: | |
eca6f534 | 813 | kfree(kernel_dev); |
1da177e4 LT |
814 | out2: |
815 | putname(dir_page); | |
816 | out1: | |
eca6f534 | 817 | kfree(kernel_type); |
1da177e4 LT |
818 | out: |
819 | return retval; | |
820 | } | |
821 | ||
822 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
1da177e4 LT |
823 | |
824 | struct compat_old_linux_dirent { | |
825 | compat_ulong_t d_ino; | |
826 | compat_ulong_t d_offset; | |
827 | unsigned short d_namlen; | |
828 | char d_name[1]; | |
829 | }; | |
830 | ||
831 | struct compat_readdir_callback { | |
832 | struct compat_old_linux_dirent __user *dirent; | |
833 | int result; | |
834 | }; | |
835 | ||
836 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 837 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
838 | { |
839 | struct compat_readdir_callback *buf = __buf; | |
840 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 841 | compat_ulong_t d_ino; |
1da177e4 LT |
842 | |
843 | if (buf->result) | |
844 | return -EINVAL; | |
afefdbb2 | 845 | d_ino = ino; |
8f3f655d AV |
846 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
847 | buf->result = -EOVERFLOW; | |
afefdbb2 | 848 | return -EOVERFLOW; |
8f3f655d | 849 | } |
1da177e4 LT |
850 | buf->result++; |
851 | dirent = buf->dirent; | |
852 | if (!access_ok(VERIFY_WRITE, dirent, | |
853 | (unsigned long)(dirent->d_name + namlen + 1) - | |
854 | (unsigned long)dirent)) | |
855 | goto efault; | |
afefdbb2 | 856 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
857 | __put_user(offset, &dirent->d_offset) || |
858 | __put_user(namlen, &dirent->d_namlen) || | |
859 | __copy_to_user(dirent->d_name, name, namlen) || | |
860 | __put_user(0, dirent->d_name + namlen)) | |
861 | goto efault; | |
862 | return 0; | |
863 | efault: | |
864 | buf->result = -EFAULT; | |
865 | return -EFAULT; | |
866 | } | |
867 | ||
868 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
869 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
870 | { | |
871 | int error; | |
872 | struct file *file; | |
873 | struct compat_readdir_callback buf; | |
874 | ||
875 | error = -EBADF; | |
876 | file = fget(fd); | |
877 | if (!file) | |
878 | goto out; | |
879 | ||
880 | buf.result = 0; | |
881 | buf.dirent = dirent; | |
882 | ||
883 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
53c9c5c0 | 884 | if (buf.result) |
1da177e4 LT |
885 | error = buf.result; |
886 | ||
887 | fput(file); | |
888 | out: | |
889 | return error; | |
890 | } | |
891 | ||
892 | struct compat_linux_dirent { | |
893 | compat_ulong_t d_ino; | |
894 | compat_ulong_t d_off; | |
895 | unsigned short d_reclen; | |
896 | char d_name[1]; | |
897 | }; | |
898 | ||
899 | struct compat_getdents_callback { | |
900 | struct compat_linux_dirent __user *current_dir; | |
901 | struct compat_linux_dirent __user *previous; | |
902 | int count; | |
903 | int error; | |
904 | }; | |
905 | ||
906 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 907 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
908 | { |
909 | struct compat_linux_dirent __user * dirent; | |
910 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 911 | compat_ulong_t d_ino; |
022a1692 | 912 | int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t)); |
1da177e4 LT |
913 | |
914 | buf->error = -EINVAL; /* only used if we fail.. */ | |
915 | if (reclen > buf->count) | |
916 | return -EINVAL; | |
afefdbb2 | 917 | d_ino = ino; |
8f3f655d AV |
918 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
919 | buf->error = -EOVERFLOW; | |
afefdbb2 | 920 | return -EOVERFLOW; |
8f3f655d | 921 | } |
1da177e4 LT |
922 | dirent = buf->previous; |
923 | if (dirent) { | |
924 | if (__put_user(offset, &dirent->d_off)) | |
925 | goto efault; | |
926 | } | |
927 | dirent = buf->current_dir; | |
afefdbb2 | 928 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
929 | goto efault; |
930 | if (__put_user(reclen, &dirent->d_reclen)) | |
931 | goto efault; | |
932 | if (copy_to_user(dirent->d_name, name, namlen)) | |
933 | goto efault; | |
934 | if (__put_user(0, dirent->d_name + namlen)) | |
935 | goto efault; | |
936 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
937 | goto efault; | |
938 | buf->previous = dirent; | |
939 | dirent = (void __user *)dirent + reclen; | |
940 | buf->current_dir = dirent; | |
941 | buf->count -= reclen; | |
942 | return 0; | |
943 | efault: | |
944 | buf->error = -EFAULT; | |
945 | return -EFAULT; | |
946 | } | |
947 | ||
948 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
949 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
950 | { | |
951 | struct file * file; | |
952 | struct compat_linux_dirent __user * lastdirent; | |
953 | struct compat_getdents_callback buf; | |
954 | int error; | |
955 | ||
956 | error = -EFAULT; | |
957 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
958 | goto out; | |
959 | ||
960 | error = -EBADF; | |
961 | file = fget(fd); | |
962 | if (!file) | |
963 | goto out; | |
964 | ||
965 | buf.current_dir = dirent; | |
966 | buf.previous = NULL; | |
967 | buf.count = count; | |
968 | buf.error = 0; | |
969 | ||
970 | error = vfs_readdir(file, compat_filldir, &buf); | |
53c9c5c0 AV |
971 | if (error >= 0) |
972 | error = buf.error; | |
1da177e4 LT |
973 | lastdirent = buf.previous; |
974 | if (lastdirent) { | |
975 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
976 | error = -EFAULT; | |
977 | else | |
978 | error = count - buf.count; | |
979 | } | |
1da177e4 LT |
980 | fput(file); |
981 | out: | |
982 | return error; | |
983 | } | |
984 | ||
985 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
986 | |
987 | struct compat_getdents_callback64 { | |
988 | struct linux_dirent64 __user *current_dir; | |
989 | struct linux_dirent64 __user *previous; | |
990 | int count; | |
991 | int error; | |
992 | }; | |
993 | ||
994 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 995 | u64 ino, unsigned int d_type) |
1da177e4 LT |
996 | { |
997 | struct linux_dirent64 __user *dirent; | |
998 | struct compat_getdents_callback64 *buf = __buf; | |
999 | int jj = NAME_OFFSET(dirent); | |
022a1692 | 1000 | int reclen = ALIGN(jj + namlen + 1, sizeof(u64)); |
1da177e4 LT |
1001 | u64 off; |
1002 | ||
1003 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1004 | if (reclen > buf->count) | |
1005 | return -EINVAL; | |
1006 | dirent = buf->previous; | |
1007 | ||
1008 | if (dirent) { | |
1009 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1010 | goto efault; | |
1011 | } | |
1012 | dirent = buf->current_dir; | |
1013 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1014 | goto efault; | |
1015 | off = 0; | |
1016 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1017 | goto efault; | |
1018 | if (__put_user(reclen, &dirent->d_reclen)) | |
1019 | goto efault; | |
1020 | if (__put_user(d_type, &dirent->d_type)) | |
1021 | goto efault; | |
1022 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1023 | goto efault; | |
1024 | if (__put_user(0, dirent->d_name + namlen)) | |
1025 | goto efault; | |
1026 | buf->previous = dirent; | |
1027 | dirent = (void __user *)dirent + reclen; | |
1028 | buf->current_dir = dirent; | |
1029 | buf->count -= reclen; | |
1030 | return 0; | |
1031 | efault: | |
1032 | buf->error = -EFAULT; | |
1033 | return -EFAULT; | |
1034 | } | |
1035 | ||
1036 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1037 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1038 | { | |
1039 | struct file * file; | |
1040 | struct linux_dirent64 __user * lastdirent; | |
1041 | struct compat_getdents_callback64 buf; | |
1042 | int error; | |
1043 | ||
1044 | error = -EFAULT; | |
1045 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1046 | goto out; | |
1047 | ||
1048 | error = -EBADF; | |
1049 | file = fget(fd); | |
1050 | if (!file) | |
1051 | goto out; | |
1052 | ||
1053 | buf.current_dir = dirent; | |
1054 | buf.previous = NULL; | |
1055 | buf.count = count; | |
1056 | buf.error = 0; | |
1057 | ||
1058 | error = vfs_readdir(file, compat_filldir64, &buf); | |
53c9c5c0 AV |
1059 | if (error >= 0) |
1060 | error = buf.error; | |
1da177e4 LT |
1061 | lastdirent = buf.previous; |
1062 | if (lastdirent) { | |
1063 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 | 1064 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0 AV |
1065 | error = -EFAULT; |
1066 | else | |
1067 | error = count - buf.count; | |
1da177e4 | 1068 | } |
1da177e4 LT |
1069 | fput(file); |
1070 | out: | |
1071 | return error; | |
1072 | } | |
1073 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1074 | ||
1075 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1076 | const struct compat_iovec __user *uvector, | |
1077 | unsigned long nr_segs, loff_t *pos) | |
1078 | { | |
1da177e4 LT |
1079 | compat_ssize_t tot_len; |
1080 | struct iovec iovstack[UIO_FASTIOV]; | |
1081 | struct iovec *iov=iovstack, *vector; | |
1082 | ssize_t ret; | |
1083 | int seg; | |
1084 | io_fn_t fn; | |
1085 | iov_fn_t fnv; | |
1086 | ||
1087 | /* | |
1088 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1089 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1090 | * traditionally returned zero for zero segments, so... | |
1091 | */ | |
1092 | ret = 0; | |
1093 | if (nr_segs == 0) | |
1094 | goto out; | |
1095 | ||
1096 | /* | |
1097 | * First get the "struct iovec" from user memory and | |
1098 | * verify all the pointers | |
1099 | */ | |
1100 | ret = -EINVAL; | |
1101 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1102 | goto out; | |
1103 | if (!file->f_op) | |
1104 | goto out; | |
1105 | if (nr_segs > UIO_FASTIOV) { | |
1106 | ret = -ENOMEM; | |
1107 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1108 | if (!iov) | |
1109 | goto out; | |
1110 | } | |
1111 | ret = -EFAULT; | |
1112 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1113 | goto out; | |
1114 | ||
1115 | /* | |
1116 | * Single unix specification: | |
1117 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1118 | * ssize_t. The total length is fitting an ssize_t | |
1119 | * | |
1120 | * Be careful here because iov_len is a size_t not an ssize_t | |
1121 | */ | |
1122 | tot_len = 0; | |
1123 | vector = iov; | |
1124 | ret = -EINVAL; | |
1125 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1126 | compat_ssize_t tmp = tot_len; | |
1127 | compat_ssize_t len; | |
1128 | compat_uptr_t buf; | |
1129 | ||
1130 | if (__get_user(len, &uvector->iov_len) || | |
1131 | __get_user(buf, &uvector->iov_base)) { | |
1132 | ret = -EFAULT; | |
1133 | goto out; | |
1134 | } | |
1135 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1136 | goto out; | |
1137 | tot_len += len; | |
1138 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1139 | goto out; | |
1140 | vector->iov_base = compat_ptr(buf); | |
1141 | vector->iov_len = (compat_size_t) len; | |
1142 | uvector++; | |
1143 | vector++; | |
1144 | } | |
1145 | if (tot_len == 0) { | |
1146 | ret = 0; | |
1147 | goto out; | |
1148 | } | |
1149 | ||
1150 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1151 | if (ret < 0) |
1da177e4 LT |
1152 | goto out; |
1153 | ||
1154 | fnv = NULL; | |
1155 | if (type == READ) { | |
1156 | fn = file->f_op->read; | |
ee0b3e67 | 1157 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1158 | } else { |
1159 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1160 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1161 | } |
1162 | ||
ee0b3e67 BP |
1163 | if (fnv) |
1164 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1165 | pos, fnv); | |
1166 | else | |
1167 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1168 | |
1da177e4 LT |
1169 | out: |
1170 | if (iov != iovstack) | |
1171 | kfree(iov); | |
0eeca283 | 1172 | if ((ret + (type == READ)) > 0) { |
0f7fc9e4 | 1173 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
1174 | if (type == READ) |
1175 | fsnotify_access(dentry); | |
1176 | else | |
1177 | fsnotify_modify(dentry); | |
1178 | } | |
1da177e4 LT |
1179 | return ret; |
1180 | } | |
1181 | ||
dac12138 GH |
1182 | static size_t compat_readv(struct file *file, |
1183 | const struct compat_iovec __user *vec, | |
1184 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1185 | { |
1da177e4 LT |
1186 | ssize_t ret = -EBADF; |
1187 | ||
1da177e4 LT |
1188 | if (!(file->f_mode & FMODE_READ)) |
1189 | goto out; | |
1190 | ||
1191 | ret = -EINVAL; | |
ee0b3e67 | 1192 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1193 | goto out; |
1194 | ||
dac12138 | 1195 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1da177e4 LT |
1196 | |
1197 | out: | |
ca8a5bd2 GH |
1198 | if (ret > 0) |
1199 | add_rchar(current, ret); | |
1200 | inc_syscr(current); | |
dac12138 GH |
1201 | return ret; |
1202 | } | |
1203 | ||
1204 | asmlinkage ssize_t | |
1205 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, | |
1206 | unsigned long vlen) | |
1207 | { | |
1208 | struct file *file; | |
10c7db27 | 1209 | int fput_needed; |
dac12138 GH |
1210 | ssize_t ret; |
1211 | ||
10c7db27 | 1212 | file = fget_light(fd, &fput_needed); |
dac12138 GH |
1213 | if (!file) |
1214 | return -EBADF; | |
1215 | ret = compat_readv(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1216 | fput_light(file, fput_needed); |
1da177e4 LT |
1217 | return ret; |
1218 | } | |
1219 | ||
f3554f4b GH |
1220 | asmlinkage ssize_t |
1221 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1222 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1223 | { |
1224 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1225 | struct file *file; | |
10c7db27 | 1226 | int fput_needed; |
f3554f4b GH |
1227 | ssize_t ret; |
1228 | ||
1229 | if (pos < 0) | |
1230 | return -EINVAL; | |
10c7db27 | 1231 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1232 | if (!file) |
1233 | return -EBADF; | |
1234 | ret = compat_readv(file, vec, vlen, &pos); | |
10c7db27 | 1235 | fput_light(file, fput_needed); |
f3554f4b GH |
1236 | return ret; |
1237 | } | |
1238 | ||
6949a631 GH |
1239 | static size_t compat_writev(struct file *file, |
1240 | const struct compat_iovec __user *vec, | |
1241 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1242 | { |
1da177e4 LT |
1243 | ssize_t ret = -EBADF; |
1244 | ||
1da177e4 LT |
1245 | if (!(file->f_mode & FMODE_WRITE)) |
1246 | goto out; | |
1247 | ||
1248 | ret = -EINVAL; | |
ee0b3e67 | 1249 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1250 | goto out; |
1251 | ||
6949a631 | 1252 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1da177e4 LT |
1253 | |
1254 | out: | |
ca8a5bd2 GH |
1255 | if (ret > 0) |
1256 | add_wchar(current, ret); | |
1257 | inc_syscw(current); | |
6949a631 GH |
1258 | return ret; |
1259 | } | |
1260 | ||
1261 | asmlinkage ssize_t | |
1262 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, | |
1263 | unsigned long vlen) | |
1264 | { | |
1265 | struct file *file; | |
10c7db27 | 1266 | int fput_needed; |
6949a631 GH |
1267 | ssize_t ret; |
1268 | ||
10c7db27 | 1269 | file = fget_light(fd, &fput_needed); |
6949a631 GH |
1270 | if (!file) |
1271 | return -EBADF; | |
1272 | ret = compat_writev(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1273 | fput_light(file, fput_needed); |
1da177e4 LT |
1274 | return ret; |
1275 | } | |
1276 | ||
f3554f4b GH |
1277 | asmlinkage ssize_t |
1278 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1279 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1280 | { |
1281 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1282 | struct file *file; | |
10c7db27 | 1283 | int fput_needed; |
f3554f4b GH |
1284 | ssize_t ret; |
1285 | ||
1286 | if (pos < 0) | |
1287 | return -EINVAL; | |
10c7db27 | 1288 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1289 | if (!file) |
1290 | return -EBADF; | |
1291 | ret = compat_writev(file, vec, vlen, &pos); | |
10c7db27 | 1292 | fput_light(file, fput_needed); |
f3554f4b GH |
1293 | return ret; |
1294 | } | |
1295 | ||
d2610202 AK |
1296 | asmlinkage long |
1297 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1298 | unsigned int nr_segs, unsigned int flags) | |
1299 | { | |
1300 | unsigned i; | |
90cbad65 | 1301 | struct iovec __user *iov; |
98232d50 | 1302 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1303 | return -EINVAL; |
1304 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1305 | for (i = 0; i < nr_segs; i++) { | |
1306 | struct compat_iovec v; | |
1307 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1308 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1309 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1310 | put_user(v.iov_len, &iov[i].iov_len)) | |
1311 | return -EFAULT; | |
1312 | } | |
1313 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1314 | } | |
1315 | ||
e922efc3 MS |
1316 | /* |
1317 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1318 | * O_LARGEFILE flag. | |
1319 | */ | |
1320 | asmlinkage long | |
1321 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1322 | { | |
5590ff0d UD |
1323 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1328 | * O_LARGEFILE flag. | |
1329 | */ | |
1330 | asmlinkage long | |
9ad11ab4 | 1331 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1332 | { |
1333 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1334 | } |
1335 | ||
1da177e4 LT |
1336 | /* |
1337 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1338 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1339 | * and envp pointers. | |
1340 | */ | |
1341 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1342 | { | |
1343 | int i = 0; | |
1344 | ||
1345 | if (argv != NULL) { | |
1346 | for (;;) { | |
1347 | compat_uptr_t p; | |
1348 | ||
1349 | if (get_user(p, argv)) | |
1350 | return -EFAULT; | |
1351 | if (!p) | |
1352 | break; | |
1353 | argv++; | |
362e6663 | 1354 | if (i++ >= max) |
1da177e4 LT |
1355 | return -E2BIG; |
1356 | } | |
1357 | } | |
1358 | return i; | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1363 | * except that it works with 32 bit argv and envp pointers. | |
1364 | */ | |
1365 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1366 | struct linux_binprm *bprm) | |
1367 | { | |
1368 | struct page *kmapped_page = NULL; | |
1369 | char *kaddr = NULL; | |
b6a2fea3 | 1370 | unsigned long kpos = 0; |
1da177e4 LT |
1371 | int ret; |
1372 | ||
1373 | while (argc-- > 0) { | |
1374 | compat_uptr_t str; | |
1375 | int len; | |
1376 | unsigned long pos; | |
1377 | ||
1378 | if (get_user(str, argv+argc) || | |
b6a2fea3 | 1379 | !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) { |
1da177e4 LT |
1380 | ret = -EFAULT; |
1381 | goto out; | |
1382 | } | |
1383 | ||
b6a2fea3 | 1384 | if (len > MAX_ARG_STRLEN) { |
1da177e4 LT |
1385 | ret = -E2BIG; |
1386 | goto out; | |
1387 | } | |
1388 | ||
b6a2fea3 | 1389 | /* We're going to work our way backwords. */ |
1da177e4 | 1390 | pos = bprm->p; |
b6a2fea3 OW |
1391 | str += len; |
1392 | bprm->p -= len; | |
1da177e4 LT |
1393 | |
1394 | while (len > 0) { | |
1da177e4 | 1395 | int offset, bytes_to_copy; |
1da177e4 LT |
1396 | |
1397 | offset = pos % PAGE_SIZE; | |
b6a2fea3 OW |
1398 | if (offset == 0) |
1399 | offset = PAGE_SIZE; | |
1400 | ||
1401 | bytes_to_copy = offset; | |
1402 | if (bytes_to_copy > len) | |
1403 | bytes_to_copy = len; | |
1404 | ||
1405 | offset -= bytes_to_copy; | |
1406 | pos -= bytes_to_copy; | |
1407 | str -= bytes_to_copy; | |
1408 | len -= bytes_to_copy; | |
1409 | ||
1410 | if (!kmapped_page || kpos != (pos & PAGE_MASK)) { | |
1411 | struct page *page; | |
1412 | ||
1413 | #ifdef CONFIG_STACK_GROWSUP | |
1414 | ret = expand_stack_downwards(bprm->vma, pos); | |
1415 | if (ret < 0) { | |
1416 | /* We've exceed the stack rlimit. */ | |
1417 | ret = -E2BIG; | |
1418 | goto out; | |
1419 | } | |
1420 | #endif | |
1421 | ret = get_user_pages(current, bprm->mm, pos, | |
1422 | 1, 1, 1, &page, NULL); | |
1423 | if (ret <= 0) { | |
1424 | /* We've exceed the stack rlimit. */ | |
1425 | ret = -E2BIG; | |
1da177e4 LT |
1426 | goto out; |
1427 | } | |
1da177e4 | 1428 | |
b6a2fea3 OW |
1429 | if (kmapped_page) { |
1430 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1431 | kunmap(kmapped_page); |
b6a2fea3 OW |
1432 | put_page(kmapped_page); |
1433 | } | |
1da177e4 LT |
1434 | kmapped_page = page; |
1435 | kaddr = kmap(kmapped_page); | |
b6a2fea3 OW |
1436 | kpos = pos & PAGE_MASK; |
1437 | flush_cache_page(bprm->vma, kpos, | |
1438 | page_to_pfn(kmapped_page)); | |
1da177e4 | 1439 | } |
b6a2fea3 OW |
1440 | if (copy_from_user(kaddr+offset, compat_ptr(str), |
1441 | bytes_to_copy)) { | |
1da177e4 LT |
1442 | ret = -EFAULT; |
1443 | goto out; | |
1444 | } | |
1da177e4 LT |
1445 | } |
1446 | } | |
1447 | ret = 0; | |
1448 | out: | |
b6a2fea3 OW |
1449 | if (kmapped_page) { |
1450 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1451 | kunmap(kmapped_page); |
b6a2fea3 | 1452 | put_page(kmapped_page); |
1da177e4 | 1453 | } |
b6a2fea3 | 1454 | return ret; |
1da177e4 LT |
1455 | } |
1456 | ||
1da177e4 LT |
1457 | /* |
1458 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1459 | * that it processes 32 bit argv and envp pointers. | |
1460 | */ | |
1461 | int compat_do_execve(char * filename, | |
1462 | compat_uptr_t __user *argv, | |
1463 | compat_uptr_t __user *envp, | |
1464 | struct pt_regs * regs) | |
1465 | { | |
1466 | struct linux_binprm *bprm; | |
1467 | struct file *file; | |
53e9309e | 1468 | struct files_struct *displaced; |
8c652f96 | 1469 | bool clear_in_exec; |
1da177e4 | 1470 | int retval; |
1da177e4 | 1471 | |
53e9309e HD |
1472 | retval = unshare_files(&displaced); |
1473 | if (retval) | |
1474 | goto out_ret; | |
1475 | ||
1da177e4 | 1476 | retval = -ENOMEM; |
11b0b5ab | 1477 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 | 1478 | if (!bprm) |
53e9309e | 1479 | goto out_files; |
1da177e4 | 1480 | |
a2a8474c ON |
1481 | retval = prepare_bprm_creds(bprm); |
1482 | if (retval) | |
a6f76f23 | 1483 | goto out_free; |
498052bb AV |
1484 | |
1485 | retval = check_unsafe_exec(bprm); | |
8c652f96 | 1486 | if (retval < 0) |
a2a8474c | 1487 | goto out_free; |
8c652f96 | 1488 | clear_in_exec = retval; |
a2a8474c | 1489 | current->in_execve = 1; |
a6f76f23 | 1490 | |
1da177e4 LT |
1491 | file = open_exec(filename); |
1492 | retval = PTR_ERR(file); | |
1493 | if (IS_ERR(file)) | |
498052bb | 1494 | goto out_unmark; |
1da177e4 LT |
1495 | |
1496 | sched_exec(); | |
1497 | ||
1da177e4 LT |
1498 | bprm->file = file; |
1499 | bprm->filename = filename; | |
1500 | bprm->interp = filename; | |
1da177e4 | 1501 | |
b6a2fea3 OW |
1502 | retval = bprm_mm_init(bprm); |
1503 | if (retval) | |
1504 | goto out_file; | |
1da177e4 | 1505 | |
b6a2fea3 | 1506 | bprm->argc = compat_count(argv, MAX_ARG_STRINGS); |
1da177e4 | 1507 | if ((retval = bprm->argc) < 0) |
a6f76f23 | 1508 | goto out; |
1da177e4 | 1509 | |
b6a2fea3 | 1510 | bprm->envc = compat_count(envp, MAX_ARG_STRINGS); |
1da177e4 | 1511 | if ((retval = bprm->envc) < 0) |
1da177e4 LT |
1512 | goto out; |
1513 | ||
1514 | retval = prepare_binprm(bprm); | |
1515 | if (retval < 0) | |
1516 | goto out; | |
1517 | ||
1518 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1519 | if (retval < 0) | |
1520 | goto out; | |
1521 | ||
1522 | bprm->exec = bprm->p; | |
1523 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1524 | if (retval < 0) | |
1525 | goto out; | |
1526 | ||
1527 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1528 | if (retval < 0) | |
1529 | goto out; | |
1530 | ||
1531 | retval = search_binary_handler(bprm, regs); | |
a6f76f23 DH |
1532 | if (retval < 0) |
1533 | goto out; | |
1da177e4 | 1534 | |
89240ba0 SS |
1535 | current->stack_start = current->mm->start_stack; |
1536 | ||
a6f76f23 | 1537 | /* execve succeeded */ |
498052bb | 1538 | current->fs->in_exec = 0; |
f9ce1f1c | 1539 | current->in_execve = 0; |
a6f76f23 DH |
1540 | acct_update_integrals(current); |
1541 | free_bprm(bprm); | |
53e9309e HD |
1542 | if (displaced) |
1543 | put_files_struct(displaced); | |
a6f76f23 | 1544 | return retval; |
1da177e4 | 1545 | |
a6f76f23 | 1546 | out: |
1da177e4 | 1547 | if (bprm->mm) |
b6a2fea3 | 1548 | mmput(bprm->mm); |
1da177e4 LT |
1549 | |
1550 | out_file: | |
1551 | if (bprm->file) { | |
1552 | allow_write_access(bprm->file); | |
1553 | fput(bprm->file); | |
1554 | } | |
1555 | ||
498052bb | 1556 | out_unmark: |
8c652f96 ON |
1557 | if (clear_in_exec) |
1558 | current->fs->in_exec = 0; | |
f9ce1f1c | 1559 | current->in_execve = 0; |
a6f76f23 DH |
1560 | |
1561 | out_free: | |
08a6fac1 | 1562 | free_bprm(bprm); |
1da177e4 | 1563 | |
53e9309e HD |
1564 | out_files: |
1565 | if (displaced) | |
1566 | reset_files_struct(displaced); | |
1da177e4 LT |
1567 | out_ret: |
1568 | return retval; | |
1569 | } | |
1570 | ||
1571 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1572 | ||
b773ad40 TG |
1573 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1574 | int timeval, int ret) | |
1575 | { | |
1576 | struct timespec ts; | |
1577 | ||
1578 | if (!p) | |
1579 | return ret; | |
1580 | ||
1581 | if (current->personality & STICKY_TIMEOUTS) | |
1582 | goto sticky; | |
1583 | ||
1584 | /* No update for zero timeout */ | |
1585 | if (!end_time->tv_sec && !end_time->tv_nsec) | |
1586 | return ret; | |
1587 | ||
1588 | ktime_get_ts(&ts); | |
1589 | ts = timespec_sub(*end_time, ts); | |
1590 | if (ts.tv_sec < 0) | |
1591 | ts.tv_sec = ts.tv_nsec = 0; | |
1592 | ||
1593 | if (timeval) { | |
1594 | struct compat_timeval rtv; | |
1595 | ||
1596 | rtv.tv_sec = ts.tv_sec; | |
1597 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
1598 | ||
1599 | if (!copy_to_user(p, &rtv, sizeof(rtv))) | |
1600 | return ret; | |
1601 | } else { | |
1602 | struct compat_timespec rts; | |
1603 | ||
1604 | rts.tv_sec = ts.tv_sec; | |
1605 | rts.tv_nsec = ts.tv_nsec; | |
1606 | ||
1607 | if (!copy_to_user(p, &rts, sizeof(rts))) | |
1608 | return ret; | |
1609 | } | |
1610 | /* | |
1611 | * If an application puts its timeval in read-only memory, we | |
1612 | * don't want the Linux-specific update to the timeval to | |
1613 | * cause a fault after the select has completed | |
1614 | * successfully. However, because we're not updating the | |
1615 | * timeval, we can't restart the system call. | |
1616 | */ | |
1617 | ||
1618 | sticky: | |
1619 | if (ret == -ERESTARTNOHAND) | |
1620 | ret = -EINTR; | |
1621 | return ret; | |
1622 | } | |
1623 | ||
1da177e4 LT |
1624 | /* |
1625 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1626 | * 64-bit unsigned longs. | |
1627 | */ | |
858119e1 | 1628 | static |
1da177e4 LT |
1629 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1630 | unsigned long *fdset) | |
1631 | { | |
022a1692 | 1632 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1633 | if (ufdset) { |
1634 | unsigned long odd; | |
1635 | ||
1636 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1637 | return -EFAULT; | |
1638 | ||
1639 | odd = nr & 1UL; | |
1640 | nr &= ~1UL; | |
1641 | while (nr) { | |
1642 | unsigned long h, l; | |
7116e994 HC |
1643 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1644 | return -EFAULT; | |
1da177e4 LT |
1645 | ufdset += 2; |
1646 | *fdset++ = h << 32 | l; | |
1647 | nr -= 2; | |
1648 | } | |
7116e994 HC |
1649 | if (odd && __get_user(*fdset, ufdset)) |
1650 | return -EFAULT; | |
1da177e4 LT |
1651 | } else { |
1652 | /* Tricky, must clear full unsigned long in the | |
1653 | * kernel fdset at the end, this makes sure that | |
1654 | * actually happens. | |
1655 | */ | |
1656 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1657 | } | |
1658 | return 0; | |
1659 | } | |
1660 | ||
858119e1 | 1661 | static |
7116e994 HC |
1662 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1663 | unsigned long *fdset) | |
1da177e4 LT |
1664 | { |
1665 | unsigned long odd; | |
022a1692 | 1666 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1667 | |
1668 | if (!ufdset) | |
7116e994 | 1669 | return 0; |
1da177e4 LT |
1670 | |
1671 | odd = nr & 1UL; | |
1672 | nr &= ~1UL; | |
1673 | while (nr) { | |
1674 | unsigned long h, l; | |
1675 | l = *fdset++; | |
1676 | h = l >> 32; | |
7116e994 HC |
1677 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1678 | return -EFAULT; | |
1da177e4 LT |
1679 | ufdset += 2; |
1680 | nr -= 2; | |
1681 | } | |
7116e994 HC |
1682 | if (odd && __put_user(*fdset, ufdset)) |
1683 | return -EFAULT; | |
1684 | return 0; | |
1da177e4 LT |
1685 | } |
1686 | ||
1687 | ||
1688 | /* | |
1689 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1690 | * should be compared to it from time to time | |
1691 | */ | |
1da177e4 LT |
1692 | |
1693 | /* | |
1694 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1695 | * like to be certain this leads to no problems. So I return | |
1696 | * EINTR just for safety. | |
1697 | * | |
1698 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1699 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1700 | */ | |
1701 | #define MAX_SELECT_SECONDS \ | |
1702 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1703 | ||
9f72949f | 1704 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e8 AV |
1705 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1706 | struct timespec *end_time) | |
1da177e4 LT |
1707 | { |
1708 | fd_set_bits fds; | |
6087b2da | 1709 | void *bits; |
bbea9f69 | 1710 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1711 | struct fdtable *fdt; |
6087b2da | 1712 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4 | 1713 | |
1da177e4 LT |
1714 | if (n < 0) |
1715 | goto out_nofds; | |
1716 | ||
bbea9f69 | 1717 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1718 | rcu_read_lock(); |
a4531edd | 1719 | fdt = files_fdtable(current->files); |
bbea9f69 | 1720 | max_fds = fdt->max_fds; |
ac5b8b6f | 1721 | rcu_read_unlock(); |
bbea9f69 VL |
1722 | if (n > max_fds) |
1723 | n = max_fds; | |
1da177e4 LT |
1724 | |
1725 | /* | |
1726 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1727 | * since we used fdset we need to allocate memory in units of | |
1728 | * long-words. | |
1729 | */ | |
1da177e4 | 1730 | size = FDS_BYTES(n); |
6087b2da BP |
1731 | bits = stack_fds; |
1732 | if (size > sizeof(stack_fds) / 6) { | |
1733 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1734 | ret = -ENOMEM; | |
1735 | if (!bits) | |
1736 | goto out_nofds; | |
1737 | } | |
1da177e4 LT |
1738 | fds.in = (unsigned long *) bits; |
1739 | fds.out = (unsigned long *) (bits + size); | |
1740 | fds.ex = (unsigned long *) (bits + 2*size); | |
1741 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1742 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1743 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1744 | ||
1745 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1746 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1747 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1748 | goto out; | |
1749 | zero_fd_set(n, fds.res_in); | |
1750 | zero_fd_set(n, fds.res_out); | |
1751 | zero_fd_set(n, fds.res_ex); | |
1752 | ||
8ff3e8e8 | 1753 | ret = do_select(n, &fds, end_time); |
1da177e4 LT |
1754 | |
1755 | if (ret < 0) | |
1756 | goto out; | |
1757 | if (!ret) { | |
1758 | ret = -ERESTARTNOHAND; | |
1759 | if (signal_pending(current)) | |
1760 | goto out; | |
1761 | ret = 0; | |
1762 | } | |
1763 | ||
7116e994 HC |
1764 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1765 | compat_set_fd_set(n, outp, fds.res_out) || | |
1766 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1767 | ret = -EFAULT; | |
1da177e4 | 1768 | out: |
6087b2da BP |
1769 | if (bits != stack_fds) |
1770 | kfree(bits); | |
1da177e4 LT |
1771 | out_nofds: |
1772 | return ret; | |
1773 | } | |
1774 | ||
9f72949f DW |
1775 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1776 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1777 | struct compat_timeval __user *tvp) | |
1778 | { | |
8ff3e8e8 | 1779 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1780 | struct compat_timeval tv; |
1781 | int ret; | |
1782 | ||
1783 | if (tvp) { | |
1784 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1785 | return -EFAULT; | |
1786 | ||
8ff3e8e8 | 1787 | to = &end_time; |
4d36a9e6 AV |
1788 | if (poll_select_set_timeout(to, |
1789 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), | |
1790 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) | |
9f72949f | 1791 | return -EINVAL; |
9f72949f DW |
1792 | } |
1793 | ||
8ff3e8e8 AV |
1794 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1795 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); | |
9f72949f DW |
1796 | |
1797 | return ret; | |
1798 | } | |
1799 | ||
f3de272b | 1800 | #ifdef HAVE_SET_RESTORE_SIGMASK |
c9da9f21 | 1801 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f DW |
1802 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1803 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1804 | compat_size_t sigsetsize) | |
1805 | { | |
1806 | compat_sigset_t ss32; | |
1807 | sigset_t ksigmask, sigsaved; | |
9f72949f | 1808 | struct compat_timespec ts; |
8ff3e8e8 | 1809 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1810 | int ret; |
1811 | ||
1812 | if (tsp) { | |
1813 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1814 | return -EFAULT; | |
1815 | ||
8ff3e8e8 AV |
1816 | to = &end_time; |
1817 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
9f72949f DW |
1818 | return -EINVAL; |
1819 | } | |
1820 | ||
1821 | if (sigmask) { | |
1822 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1823 | return -EINVAL; | |
1824 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1825 | return -EFAULT; | |
1826 | sigset_from_compat(&ksigmask, &ss32); | |
1827 | ||
1828 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1829 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1830 | } | |
1831 | ||
8ff3e8e8 AV |
1832 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1833 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); | |
9f72949f DW |
1834 | |
1835 | if (ret == -ERESTARTNOHAND) { | |
1836 | /* | |
1837 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1838 | * the signal on the way back to userspace, before the signal | |
1839 | * mask is restored. | |
1840 | */ | |
1841 | if (sigmask) { | |
1842 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1843 | sizeof(sigsaved)); | |
4e4c22c7 | 1844 | set_restore_sigmask(); |
9f72949f DW |
1845 | } |
1846 | } else if (sigmask) | |
1847 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1848 | ||
1849 | return ret; | |
1850 | } | |
1851 | ||
1852 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1853 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1854 | struct compat_timespec __user *tsp, void __user *sig) | |
1855 | { | |
1856 | compat_size_t sigsetsize = 0; | |
1857 | compat_uptr_t up = 0; | |
1858 | ||
1859 | if (sig) { | |
1860 | if (!access_ok(VERIFY_READ, sig, | |
1861 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1862 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1863 | __get_user(sigsetsize, | |
1864 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1865 | return -EFAULT; | |
1866 | } | |
c9da9f21 HC |
1867 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1868 | sigsetsize); | |
9f72949f DW |
1869 | } |
1870 | ||
1871 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1872 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1873 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1874 | { | |
1875 | compat_sigset_t ss32; | |
1876 | sigset_t ksigmask, sigsaved; | |
1877 | struct compat_timespec ts; | |
8ff3e8e8 | 1878 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1879 | int ret; |
1880 | ||
1881 | if (tsp) { | |
1882 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1883 | return -EFAULT; | |
1884 | ||
8ff3e8e8 AV |
1885 | to = &end_time; |
1886 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
1887 | return -EINVAL; | |
9f72949f DW |
1888 | } |
1889 | ||
1890 | if (sigmask) { | |
3835a9bd | 1891 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1892 | return -EINVAL; |
1893 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1894 | return -EFAULT; | |
1895 | sigset_from_compat(&ksigmask, &ss32); | |
1896 | ||
1897 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1898 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1899 | } | |
1900 | ||
8ff3e8e8 | 1901 | ret = do_sys_poll(ufds, nfds, to); |
9f72949f DW |
1902 | |
1903 | /* We can restart this syscall, usually */ | |
1904 | if (ret == -EINTR) { | |
1905 | /* | |
1906 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1907 | * the signal on the way back to userspace, before the signal | |
1908 | * mask is restored. | |
1909 | */ | |
1910 | if (sigmask) { | |
1911 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1912 | sizeof(sigsaved)); | |
4e4c22c7 | 1913 | set_restore_sigmask(); |
9f72949f DW |
1914 | } |
1915 | ret = -ERESTARTNOHAND; | |
1916 | } else if (sigmask) | |
1917 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1918 | ||
8ff3e8e8 | 1919 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f DW |
1920 | |
1921 | return ret; | |
1922 | } | |
f3de272b | 1923 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
9f72949f | 1924 | |
1da177e4 LT |
1925 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1926 | /* Stuff for NFS server syscalls... */ | |
1927 | struct compat_nfsctl_svc { | |
1928 | u16 svc32_port; | |
1929 | s32 svc32_nthreads; | |
1930 | }; | |
1931 | ||
1932 | struct compat_nfsctl_client { | |
1933 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1934 | s32 cl32_naddr; | |
1935 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1936 | s32 cl32_fhkeytype; | |
1937 | s32 cl32_fhkeylen; | |
1938 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1939 | }; | |
1940 | ||
1941 | struct compat_nfsctl_export { | |
1942 | char ex32_client[NFSCLNT_IDMAX+1]; | |
1943 | char ex32_path[NFS_MAXPATHLEN+1]; | |
1944 | compat_dev_t ex32_dev; | |
1945 | compat_ino_t ex32_ino; | |
1946 | compat_int_t ex32_flags; | |
202e5979 SR |
1947 | __compat_uid_t ex32_anon_uid; |
1948 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
1949 | }; |
1950 | ||
1951 | struct compat_nfsctl_fdparm { | |
1952 | struct sockaddr gd32_addr; | |
1953 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1954 | compat_int_t gd32_version; | |
1955 | }; | |
1956 | ||
1957 | struct compat_nfsctl_fsparm { | |
1958 | struct sockaddr gd32_addr; | |
1959 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1960 | compat_int_t gd32_maxlen; | |
1961 | }; | |
1962 | ||
1963 | struct compat_nfsctl_arg { | |
1964 | compat_int_t ca32_version; /* safeguard */ | |
1965 | union { | |
1966 | struct compat_nfsctl_svc u32_svc; | |
1967 | struct compat_nfsctl_client u32_client; | |
1968 | struct compat_nfsctl_export u32_export; | |
1969 | struct compat_nfsctl_fdparm u32_getfd; | |
1970 | struct compat_nfsctl_fsparm u32_getfs; | |
1971 | } u; | |
1972 | #define ca32_svc u.u32_svc | |
1973 | #define ca32_client u.u32_client | |
1974 | #define ca32_export u.u32_export | |
1975 | #define ca32_getfd u.u32_getfd | |
1976 | #define ca32_getfs u.u32_getfs | |
1977 | }; | |
1978 | ||
1979 | union compat_nfsctl_res { | |
1980 | __u8 cr32_getfh[NFS_FHSIZE]; | |
1981 | struct knfsd_fh cr32_getfs; | |
1982 | }; | |
1983 | ||
d64b1c87 LFS |
1984 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
1985 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 1986 | { |
d64b1c87 LFS |
1987 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
1988 | get_user(karg->ca_version, &arg->ca32_version) || | |
1989 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
1990 | __get_user(karg->ca_svc.svc_nthreads, | |
1991 | &arg->ca32_svc.svc32_nthreads)) | |
1992 | return -EFAULT; | |
1993 | return 0; | |
1da177e4 LT |
1994 | } |
1995 | ||
d64b1c87 LFS |
1996 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
1997 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 1998 | { |
d64b1c87 LFS |
1999 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2000 | sizeof(arg->ca32_client)) || | |
2001 | get_user(karg->ca_version, &arg->ca32_version) || | |
2002 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2003 | &arg->ca32_client.cl32_ident[0], | |
2004 | NFSCLNT_IDMAX) || | |
2005 | __get_user(karg->ca_client.cl_naddr, | |
2006 | &arg->ca32_client.cl32_naddr) || | |
2007 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2008 | &arg->ca32_client.cl32_addrlist[0], | |
2009 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2010 | __get_user(karg->ca_client.cl_fhkeytype, | |
2011 | &arg->ca32_client.cl32_fhkeytype) || | |
2012 | __get_user(karg->ca_client.cl_fhkeylen, | |
2013 | &arg->ca32_client.cl32_fhkeylen) || | |
2014 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2015 | &arg->ca32_client.cl32_fhkey[0], | |
2016 | NFSCLNT_KEYMAX)) | |
2017 | return -EFAULT; | |
1da177e4 | 2018 | |
d64b1c87 | 2019 | return 0; |
1da177e4 LT |
2020 | } |
2021 | ||
d64b1c87 LFS |
2022 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2023 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2024 | { |
d64b1c87 LFS |
2025 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2026 | sizeof(arg->ca32_export)) || | |
2027 | get_user(karg->ca_version, &arg->ca32_version) || | |
2028 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2029 | &arg->ca32_export.ex32_client[0], | |
2030 | NFSCLNT_IDMAX) || | |
2031 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2032 | &arg->ca32_export.ex32_path[0], | |
2033 | NFS_MAXPATHLEN) || | |
2034 | __get_user(karg->ca_export.ex_dev, | |
2035 | &arg->ca32_export.ex32_dev) || | |
2036 | __get_user(karg->ca_export.ex_ino, | |
2037 | &arg->ca32_export.ex32_ino) || | |
2038 | __get_user(karg->ca_export.ex_flags, | |
2039 | &arg->ca32_export.ex32_flags) || | |
2040 | __get_user(karg->ca_export.ex_anon_uid, | |
2041 | &arg->ca32_export.ex32_anon_uid) || | |
2042 | __get_user(karg->ca_export.ex_anon_gid, | |
2043 | &arg->ca32_export.ex32_anon_gid)) | |
2044 | return -EFAULT; | |
1da177e4 LT |
2045 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2046 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2047 | ||
d64b1c87 | 2048 | return 0; |
1da177e4 LT |
2049 | } |
2050 | ||
d64b1c87 LFS |
2051 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2052 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2053 | { |
d64b1c87 LFS |
2054 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2055 | sizeof(arg->ca32_getfd)) || | |
2056 | get_user(karg->ca_version, &arg->ca32_version) || | |
2057 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2058 | &arg->ca32_getfd.gd32_addr, | |
2059 | (sizeof(struct sockaddr))) || | |
2060 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2061 | &arg->ca32_getfd.gd32_path, | |
2062 | (NFS_MAXPATHLEN+1)) || | |
2063 | __get_user(karg->ca_getfd.gd_version, | |
2064 | &arg->ca32_getfd.gd32_version)) | |
2065 | return -EFAULT; | |
1da177e4 | 2066 | |
d64b1c87 | 2067 | return 0; |
1da177e4 LT |
2068 | } |
2069 | ||
d64b1c87 LFS |
2070 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2071 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2072 | { |
d64b1c87 LFS |
2073 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2074 | get_user(karg->ca_version, &arg->ca32_version) || | |
2075 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2076 | &arg->ca32_getfs.gd32_addr, | |
2077 | (sizeof(struct sockaddr))) || | |
2078 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2079 | &arg->ca32_getfs.gd32_path, | |
2080 | (NFS_MAXPATHLEN+1)) || | |
2081 | __get_user(karg->ca_getfs.gd_maxlen, | |
2082 | &arg->ca32_getfs.gd32_maxlen)) | |
2083 | return -EFAULT; | |
1da177e4 | 2084 | |
d64b1c87 | 2085 | return 0; |
1da177e4 LT |
2086 | } |
2087 | ||
2088 | /* This really doesn't need translations, we are only passing | |
2089 | * back a union which contains opaque nfs file handle data. | |
2090 | */ | |
d64b1c87 LFS |
2091 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2092 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2093 | { |
2094 | int err; | |
2095 | ||
2096 | err = copy_to_user(res, kres, sizeof(*res)); | |
2097 | ||
2098 | return (err) ? -EFAULT : 0; | |
2099 | } | |
2100 | ||
d64b1c87 LFS |
2101 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2102 | struct compat_nfsctl_arg __user *arg, | |
2103 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2104 | { |
2105 | struct nfsctl_arg *karg; | |
2106 | union nfsctl_res *kres; | |
2107 | mm_segment_t oldfs; | |
2108 | int err; | |
2109 | ||
2110 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2111 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2112 | if(!karg || !kres) { | |
2113 | err = -ENOMEM; | |
2114 | goto done; | |
2115 | } | |
2116 | ||
2117 | switch(cmd) { | |
2118 | case NFSCTL_SVC: | |
2119 | err = compat_nfs_svc_trans(karg, arg); | |
2120 | break; | |
2121 | ||
2122 | case NFSCTL_ADDCLIENT: | |
2123 | err = compat_nfs_clnt_trans(karg, arg); | |
2124 | break; | |
2125 | ||
2126 | case NFSCTL_DELCLIENT: | |
2127 | err = compat_nfs_clnt_trans(karg, arg); | |
2128 | break; | |
2129 | ||
2130 | case NFSCTL_EXPORT: | |
2131 | case NFSCTL_UNEXPORT: | |
2132 | err = compat_nfs_exp_trans(karg, arg); | |
2133 | break; | |
2134 | ||
2135 | case NFSCTL_GETFD: | |
2136 | err = compat_nfs_getfd_trans(karg, arg); | |
2137 | break; | |
2138 | ||
2139 | case NFSCTL_GETFS: | |
2140 | err = compat_nfs_getfs_trans(karg, arg); | |
2141 | break; | |
2142 | ||
2143 | default: | |
2144 | err = -EINVAL; | |
57070d01 | 2145 | break; |
1da177e4 LT |
2146 | } |
2147 | ||
57070d01 PS |
2148 | if (err) |
2149 | goto done; | |
2150 | ||
1da177e4 LT |
2151 | oldfs = get_fs(); |
2152 | set_fs(KERNEL_DS); | |
2153 | /* The __user pointer casts are valid because of the set_fs() */ | |
2154 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2155 | set_fs(oldfs); | |
2156 | ||
2157 | if (err) | |
2158 | goto done; | |
2159 | ||
2160 | if((cmd == NFSCTL_GETFD) || | |
2161 | (cmd == NFSCTL_GETFS)) | |
2162 | err = compat_nfs_getfh_res_trans(kres, res); | |
2163 | ||
2164 | done: | |
2165 | kfree(karg); | |
2166 | kfree(kres); | |
2167 | return err; | |
2168 | } | |
2169 | #else /* !NFSD */ | |
2170 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2171 | { | |
2172 | return sys_ni_syscall(); | |
2173 | } | |
2174 | #endif | |
f6dfb4fd DL |
2175 | |
2176 | #ifdef CONFIG_EPOLL | |
2177 | ||
f3de272b | 2178 | #ifdef HAVE_SET_RESTORE_SIGMASK |
f6dfb4fd DL |
2179 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
2180 | struct compat_epoll_event __user *events, | |
2181 | int maxevents, int timeout, | |
2182 | const compat_sigset_t __user *sigmask, | |
2183 | compat_size_t sigsetsize) | |
2184 | { | |
2185 | long err; | |
2186 | compat_sigset_t csigmask; | |
2187 | sigset_t ksigmask, sigsaved; | |
2188 | ||
2189 | /* | |
2190 | * If the caller wants a certain signal mask to be set during the wait, | |
2191 | * we apply it here. | |
2192 | */ | |
2193 | if (sigmask) { | |
2194 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2195 | return -EINVAL; | |
2196 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2197 | return -EFAULT; | |
2198 | sigset_from_compat(&ksigmask, &csigmask); | |
2199 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2200 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2201 | } | |
2202 | ||
f6dfb4fd | 2203 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
f6dfb4fd DL |
2204 | |
2205 | /* | |
2206 | * If we changed the signal mask, we need to restore the original one. | |
2207 | * In case we've got a signal while waiting, we do not restore the | |
2208 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2209 | * the way back to userspace, before the signal mask is restored. | |
2210 | */ | |
2211 | if (sigmask) { | |
2212 | if (err == -EINTR) { | |
2213 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2214 | sizeof(sigsaved)); | |
4e4c22c7 | 2215 | set_restore_sigmask(); |
f6dfb4fd DL |
2216 | } else |
2217 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2218 | } | |
2219 | ||
2220 | return err; | |
2221 | } | |
f3de272b | 2222 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
f6dfb4fd DL |
2223 | |
2224 | #endif /* CONFIG_EPOLL */ | |
6d18c922 DL |
2225 | |
2226 | #ifdef CONFIG_SIGNALFD | |
2227 | ||
9deb27ba UD |
2228 | asmlinkage long compat_sys_signalfd4(int ufd, |
2229 | const compat_sigset_t __user *sigmask, | |
2230 | compat_size_t sigsetsize, int flags) | |
6d18c922 DL |
2231 | { |
2232 | compat_sigset_t ss32; | |
2233 | sigset_t tmp; | |
2234 | sigset_t __user *ksigmask; | |
2235 | ||
2236 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2237 | return -EINVAL; | |
2238 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
2239 | return -EFAULT; | |
2240 | sigset_from_compat(&tmp, &ss32); | |
2241 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); | |
2242 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) | |
2243 | return -EFAULT; | |
2244 | ||
9deb27ba | 2245 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
6d18c922 DL |
2246 | } |
2247 | ||
9deb27ba UD |
2248 | asmlinkage long compat_sys_signalfd(int ufd, |
2249 | const compat_sigset_t __user *sigmask, | |
2250 | compat_size_t sigsetsize) | |
2251 | { | |
2252 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); | |
2253 | } | |
6d18c922 DL |
2254 | #endif /* CONFIG_SIGNALFD */ |
2255 | ||
83f5d126 DL |
2256 | #ifdef CONFIG_TIMERFD |
2257 | ||
4d672e7a DL |
2258 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
2259 | const struct compat_itimerspec __user *utmr, | |
2260 | struct compat_itimerspec __user *otmr) | |
83f5d126 | 2261 | { |
4d672e7a | 2262 | int error; |
83f5d126 DL |
2263 | struct itimerspec t; |
2264 | struct itimerspec __user *ut; | |
2265 | ||
83f5d126 | 2266 | if (get_compat_itimerspec(&t, utmr)) |
8317f14b | 2267 | return -EFAULT; |
4d672e7a DL |
2268 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
2269 | if (copy_to_user(&ut[0], &t, sizeof(t))) | |
8317f14b | 2270 | return -EFAULT; |
4d672e7a DL |
2271 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
2272 | if (!error && otmr) | |
2273 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || | |
2274 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2275 | ||
2276 | return error; | |
2277 | } | |
2278 | ||
2279 | asmlinkage long compat_sys_timerfd_gettime(int ufd, | |
2280 | struct compat_itimerspec __user *otmr) | |
2281 | { | |
2282 | int error; | |
2283 | struct itimerspec t; | |
2284 | struct itimerspec __user *ut; | |
83f5d126 | 2285 | |
4d672e7a DL |
2286 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
2287 | error = sys_timerfd_gettime(ufd, ut); | |
2288 | if (!error) | |
2289 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || | |
2290 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2291 | ||
2292 | return error; | |
83f5d126 DL |
2293 | } |
2294 | ||
2295 | #endif /* CONFIG_TIMERFD */ |