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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/attr.c | |
4 | * | |
5 | * Copyright (C) 1991, 1992 Linus Torvalds | |
6 | * changes by Thomas Schoebel-Theuer | |
7 | */ | |
8 | ||
630d9c47 | 9 | #include <linux/export.h> |
1da177e4 LT |
10 | #include <linux/time.h> |
11 | #include <linux/mm.h> | |
12 | #include <linux/string.h> | |
3f07c014 | 13 | #include <linux/sched/signal.h> |
16f7e0fe | 14 | #include <linux/capability.h> |
0eeca283 | 15 | #include <linux/fsnotify.h> |
1da177e4 | 16 | #include <linux/fcntl.h> |
1da177e4 | 17 | #include <linux/security.h> |
975d2943 | 18 | #include <linux/evm.h> |
9957a504 | 19 | #include <linux/ima.h> |
1da177e4 | 20 | |
11c2a870 CB |
21 | #include "internal.h" |
22 | ||
72ae017c CB |
23 | /** |
24 | * setattr_should_drop_sgid - determine whether the setgid bit needs to be | |
25 | * removed | |
26 | * @mnt_userns: user namespace of the mount @inode was found from | |
27 | * @inode: inode to check | |
28 | * | |
29 | * This function determines whether the setgid bit needs to be removed. | |
30 | * We retain backwards compatibility and require setgid bit to be removed | |
31 | * unconditionally if S_IXGRP is set. Otherwise we have the exact same | |
32 | * requirements as setattr_prepare() and setattr_copy(). | |
33 | * | |
34 | * Return: ATTR_KILL_SGID if setgid bit needs to be removed, 0 otherwise. | |
35 | */ | |
36 | int setattr_should_drop_sgid(struct user_namespace *mnt_userns, | |
37 | const struct inode *inode) | |
38 | { | |
39 | umode_t mode = inode->i_mode; | |
40 | ||
41 | if (!(mode & S_ISGID)) | |
42 | return 0; | |
43 | if (mode & S_IXGRP) | |
44 | return ATTR_KILL_SGID; | |
45 | if (!in_group_or_capable(mnt_userns, inode, | |
46 | i_gid_into_vfsgid(mnt_userns, inode))) | |
47 | return ATTR_KILL_SGID; | |
48 | return 0; | |
49 | } | |
50 | ||
e243e3f9 CB |
51 | /* |
52 | * The logic we want is | |
53 | * | |
54 | * if suid or (sgid and xgrp) | |
55 | * remove privs | |
56 | */ | |
57 | int should_remove_suid(struct dentry *dentry) | |
58 | { | |
59 | umode_t mode = d_inode(dentry)->i_mode; | |
60 | int kill = 0; | |
61 | ||
62 | /* suid always must be killed */ | |
63 | if (unlikely(mode & S_ISUID)) | |
64 | kill = ATTR_KILL_SUID; | |
65 | ||
66 | /* | |
67 | * sgid without any exec bits is just a mandatory locking mark; leave | |
68 | * it alone. If some exec bits are set, it's a real sgid; kill it. | |
69 | */ | |
70 | if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) | |
71 | kill |= ATTR_KILL_SGID; | |
72 | ||
73 | if (unlikely(kill && !capable(CAP_FSETID) && S_ISREG(mode))) | |
74 | return kill; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | EXPORT_SYMBOL(should_remove_suid); | |
79 | ||
2f221d6f CB |
80 | /** |
81 | * chown_ok - verify permissions to chown inode | |
82 | * @mnt_userns: user namespace of the mount @inode was found from | |
83 | * @inode: inode to check permissions on | |
81a1807d | 84 | * @ia_vfsuid: uid to chown @inode to |
2f221d6f CB |
85 | * |
86 | * If the inode has been found through an idmapped mount the user namespace of | |
87 | * the vfsmount must be passed through @mnt_userns. This function will then | |
88 | * take care to map the inode according to @mnt_userns before checking | |
89 | * permissions. On non-idmapped mounts or if permission checking is to be | |
90 | * performed on the raw inode simply passs init_user_ns. | |
91 | */ | |
92 | static bool chown_ok(struct user_namespace *mnt_userns, | |
b27c82e1 | 93 | const struct inode *inode, vfsuid_t ia_vfsuid) |
0031181c | 94 | { |
b27c82e1 CB |
95 | vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode); |
96 | if (vfsuid_eq_kuid(vfsuid, current_fsuid()) && | |
97 | vfsuid_eq(ia_vfsuid, vfsuid)) | |
0031181c | 98 | return true; |
2f221d6f | 99 | if (capable_wrt_inode_uidgid(mnt_userns, inode, CAP_CHOWN)) |
0031181c | 100 | return true; |
b27c82e1 | 101 | if (!vfsuid_valid(vfsuid) && |
0031181c EB |
102 | ns_capable(inode->i_sb->s_user_ns, CAP_CHOWN)) |
103 | return true; | |
104 | return false; | |
105 | } | |
106 | ||
2f221d6f CB |
107 | /** |
108 | * chgrp_ok - verify permissions to chgrp inode | |
109 | * @mnt_userns: user namespace of the mount @inode was found from | |
110 | * @inode: inode to check permissions on | |
81a1807d | 111 | * @ia_vfsgid: gid to chown @inode to |
2f221d6f CB |
112 | * |
113 | * If the inode has been found through an idmapped mount the user namespace of | |
114 | * the vfsmount must be passed through @mnt_userns. This function will then | |
115 | * take care to map the inode according to @mnt_userns before checking | |
116 | * permissions. On non-idmapped mounts or if permission checking is to be | |
117 | * performed on the raw inode simply passs init_user_ns. | |
118 | */ | |
119 | static bool chgrp_ok(struct user_namespace *mnt_userns, | |
b27c82e1 | 120 | const struct inode *inode, vfsgid_t ia_vfsgid) |
0031181c | 121 | { |
b27c82e1 CB |
122 | vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode); |
123 | vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode); | |
124 | if (vfsuid_eq_kuid(vfsuid, current_fsuid())) { | |
125 | if (vfsgid_eq(ia_vfsgid, vfsgid)) | |
168f9128 | 126 | return true; |
b27c82e1 | 127 | if (vfsgid_in_group_p(ia_vfsgid)) |
168f9128 CB |
128 | return true; |
129 | } | |
2f221d6f | 130 | if (capable_wrt_inode_uidgid(mnt_userns, inode, CAP_CHOWN)) |
0031181c | 131 | return true; |
b27c82e1 | 132 | if (!vfsgid_valid(vfsgid) && |
0031181c EB |
133 | ns_capable(inode->i_sb->s_user_ns, CAP_CHOWN)) |
134 | return true; | |
135 | return false; | |
136 | } | |
137 | ||
2c27c65e | 138 | /** |
31051c85 | 139 | * setattr_prepare - check if attribute changes to a dentry are allowed |
2f221d6f | 140 | * @mnt_userns: user namespace of the mount the inode was found from |
31051c85 | 141 | * @dentry: dentry to check |
2c27c65e CH |
142 | * @attr: attributes to change |
143 | * | |
144 | * Check if we are allowed to change the attributes contained in @attr | |
31051c85 JK |
145 | * in the given dentry. This includes the normal unix access permission |
146 | * checks, as well as checks for rlimits and others. The function also clears | |
147 | * SGID bit from mode if user is not allowed to set it. Also file capabilities | |
148 | * and IMA extended attributes are cleared if ATTR_KILL_PRIV is set. | |
2c27c65e | 149 | * |
2f221d6f CB |
150 | * If the inode has been found through an idmapped mount the user namespace of |
151 | * the vfsmount must be passed through @mnt_userns. This function will then | |
152 | * take care to map the inode according to @mnt_userns before checking | |
153 | * permissions. On non-idmapped mounts or if permission checking is to be | |
154 | * performed on the raw inode simply passs init_user_ns. | |
155 | * | |
2c27c65e CH |
156 | * Should be called as the first thing in ->setattr implementations, |
157 | * possibly after taking additional locks. | |
158 | */ | |
2f221d6f CB |
159 | int setattr_prepare(struct user_namespace *mnt_userns, struct dentry *dentry, |
160 | struct iattr *attr) | |
1da177e4 | 161 | { |
31051c85 | 162 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
163 | unsigned int ia_valid = attr->ia_valid; |
164 | ||
2c27c65e CH |
165 | /* |
166 | * First check size constraints. These can't be overriden using | |
167 | * ATTR_FORCE. | |
168 | */ | |
169 | if (ia_valid & ATTR_SIZE) { | |
170 | int error = inode_newsize_ok(inode, attr->ia_size); | |
171 | if (error) | |
172 | return error; | |
173 | } | |
174 | ||
1da177e4 LT |
175 | /* If force is set do it anyway. */ |
176 | if (ia_valid & ATTR_FORCE) | |
030b533c | 177 | goto kill_priv; |
1da177e4 LT |
178 | |
179 | /* Make sure a caller can chown. */ | |
b27c82e1 CB |
180 | if ((ia_valid & ATTR_UID) && |
181 | !chown_ok(mnt_userns, inode, attr->ia_vfsuid)) | |
2c27c65e | 182 | return -EPERM; |
1da177e4 LT |
183 | |
184 | /* Make sure caller can chgrp. */ | |
b27c82e1 CB |
185 | if ((ia_valid & ATTR_GID) && |
186 | !chgrp_ok(mnt_userns, inode, attr->ia_vfsgid)) | |
2c27c65e | 187 | return -EPERM; |
1da177e4 LT |
188 | |
189 | /* Make sure a caller can chmod. */ | |
190 | if (ia_valid & ATTR_MODE) { | |
b27c82e1 | 191 | vfsgid_t vfsgid; |
168f9128 | 192 | |
2f221d6f | 193 | if (!inode_owner_or_capable(mnt_userns, inode)) |
2c27c65e | 194 | return -EPERM; |
168f9128 CB |
195 | |
196 | if (ia_valid & ATTR_GID) | |
b27c82e1 | 197 | vfsgid = attr->ia_vfsgid; |
168f9128 | 198 | else |
b27c82e1 | 199 | vfsgid = i_gid_into_vfsgid(mnt_userns, inode); |
168f9128 | 200 | |
1da177e4 | 201 | /* Also check the setgid bit! */ |
11c2a870 | 202 | if (!in_group_or_capable(mnt_userns, inode, vfsgid)) |
1da177e4 LT |
203 | attr->ia_mode &= ~S_ISGID; |
204 | } | |
205 | ||
206 | /* Check for setting the inode time. */ | |
9767d749 | 207 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) { |
2f221d6f | 208 | if (!inode_owner_or_capable(mnt_userns, inode)) |
2c27c65e | 209 | return -EPERM; |
1da177e4 | 210 | } |
2c27c65e | 211 | |
030b533c JK |
212 | kill_priv: |
213 | /* User has permission for the change */ | |
214 | if (ia_valid & ATTR_KILL_PRIV) { | |
215 | int error; | |
216 | ||
71bc356f | 217 | error = security_inode_killpriv(mnt_userns, dentry); |
030b533c JK |
218 | if (error) |
219 | return error; | |
220 | } | |
221 | ||
2c27c65e | 222 | return 0; |
1da177e4 | 223 | } |
31051c85 | 224 | EXPORT_SYMBOL(setattr_prepare); |
1da177e4 | 225 | |
25d9e2d1 | 226 | /** |
227 | * inode_newsize_ok - may this inode be truncated to a given size | |
228 | * @inode: the inode to be truncated | |
229 | * @offset: the new size to assign to the inode | |
25d9e2d1 | 230 | * |
7bb46a67 | 231 | * inode_newsize_ok must be called with i_mutex held. |
232 | * | |
25d9e2d1 | 233 | * inode_newsize_ok will check filesystem limits and ulimits to check that the |
234 | * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ | |
235 | * when necessary. Caller must not proceed with inode size change if failure is | |
236 | * returned. @inode must be a file (not directory), with appropriate | |
237 | * permissions to allow truncate (inode_newsize_ok does NOT check these | |
238 | * conditions). | |
3fae1746 MW |
239 | * |
240 | * Return: 0 on success, -ve errno on failure | |
25d9e2d1 | 241 | */ |
242 | int inode_newsize_ok(const struct inode *inode, loff_t offset) | |
243 | { | |
e2ebff9c DH |
244 | if (offset < 0) |
245 | return -EINVAL; | |
25d9e2d1 | 246 | if (inode->i_size < offset) { |
247 | unsigned long limit; | |
248 | ||
d554ed89 | 249 | limit = rlimit(RLIMIT_FSIZE); |
25d9e2d1 | 250 | if (limit != RLIM_INFINITY && offset > limit) |
251 | goto out_sig; | |
252 | if (offset > inode->i_sb->s_maxbytes) | |
253 | goto out_big; | |
254 | } else { | |
255 | /* | |
256 | * truncation of in-use swapfiles is disallowed - it would | |
257 | * cause subsequent swapout to scribble on the now-freed | |
258 | * blocks. | |
259 | */ | |
260 | if (IS_SWAPFILE(inode)) | |
261 | return -ETXTBSY; | |
262 | } | |
263 | ||
264 | return 0; | |
265 | out_sig: | |
266 | send_sig(SIGXFSZ, current, 0); | |
267 | out_big: | |
268 | return -EFBIG; | |
269 | } | |
270 | EXPORT_SYMBOL(inode_newsize_ok); | |
271 | ||
7bb46a67 | 272 | /** |
6a1a90ad | 273 | * setattr_copy - copy simple metadata updates into the generic inode |
2f221d6f | 274 | * @mnt_userns: user namespace of the mount the inode was found from |
7bb46a67 | 275 | * @inode: the inode to be updated |
276 | * @attr: the new attributes | |
277 | * | |
6a1a90ad | 278 | * setattr_copy must be called with i_mutex held. |
7bb46a67 | 279 | * |
6a1a90ad | 280 | * setattr_copy updates the inode's metadata with that specified |
b27c82e1 | 281 | * in attr on idmapped mounts. Necessary permission checks to determine |
2f221d6f CB |
282 | * whether or not the S_ISGID property needs to be removed are performed with |
283 | * the correct idmapped mount permission helpers. | |
284 | * Noticeably missing is inode size update, which is more complex | |
2c27c65e | 285 | * as it requires pagecache updates. |
7bb46a67 | 286 | * |
2f221d6f CB |
287 | * If the inode has been found through an idmapped mount the user namespace of |
288 | * the vfsmount must be passed through @mnt_userns. This function will then | |
289 | * take care to map the inode according to @mnt_userns before checking | |
290 | * permissions. On non-idmapped mounts or if permission checking is to be | |
291 | * performed on the raw inode simply passs init_user_ns. | |
292 | * | |
7bb46a67 | 293 | * The inode is not marked as dirty after this operation. The rationale is |
294 | * that for "simple" filesystems, the struct inode is the inode storage. | |
295 | * The caller is free to mark the inode dirty afterwards if needed. | |
296 | */ | |
2f221d6f CB |
297 | void setattr_copy(struct user_namespace *mnt_userns, struct inode *inode, |
298 | const struct iattr *attr) | |
1da177e4 LT |
299 | { |
300 | unsigned int ia_valid = attr->ia_valid; | |
4a30131e | 301 | |
b27c82e1 CB |
302 | i_uid_update(mnt_userns, attr, inode); |
303 | i_gid_update(mnt_userns, attr, inode); | |
eb31e2f6 AG |
304 | if (ia_valid & ATTR_ATIME) |
305 | inode->i_atime = attr->ia_atime; | |
306 | if (ia_valid & ATTR_MTIME) | |
307 | inode->i_mtime = attr->ia_mtime; | |
308 | if (ia_valid & ATTR_CTIME) | |
309 | inode->i_ctime = attr->ia_ctime; | |
1da177e4 LT |
310 | if (ia_valid & ATTR_MODE) { |
311 | umode_t mode = attr->ia_mode; | |
11c2a870 CB |
312 | if (!in_group_or_capable(mnt_userns, inode, |
313 | i_gid_into_vfsgid(mnt_userns, inode))) | |
1da177e4 LT |
314 | mode &= ~S_ISGID; |
315 | inode->i_mode = mode; | |
316 | } | |
7bb46a67 | 317 | } |
6a1a90ad | 318 | EXPORT_SYMBOL(setattr_copy); |
7bb46a67 | 319 | |
7bb698f0 AG |
320 | int may_setattr(struct user_namespace *mnt_userns, struct inode *inode, |
321 | unsigned int ia_valid) | |
322 | { | |
323 | int error; | |
324 | ||
325 | if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) { | |
326 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
327 | return -EPERM; | |
328 | } | |
329 | ||
330 | /* | |
331 | * If utimes(2) and friends are called with times == NULL (or both | |
332 | * times are UTIME_NOW), then we need to check for write permission | |
333 | */ | |
334 | if (ia_valid & ATTR_TOUCH) { | |
335 | if (IS_IMMUTABLE(inode)) | |
336 | return -EPERM; | |
337 | ||
338 | if (!inode_owner_or_capable(mnt_userns, inode)) { | |
339 | error = inode_permission(mnt_userns, inode, MAY_WRITE); | |
340 | if (error) | |
341 | return error; | |
342 | } | |
343 | } | |
344 | return 0; | |
345 | } | |
346 | EXPORT_SYMBOL(may_setattr); | |
347 | ||
27ac0ffe BF |
348 | /** |
349 | * notify_change - modify attributes of a filesytem object | |
2f221d6f | 350 | * @mnt_userns: user namespace of the mount the inode was found from |
27ac0ffe | 351 | * @dentry: object affected |
3fae1746 | 352 | * @attr: new attributes |
27ac0ffe BF |
353 | * @delegated_inode: returns inode, if the inode is delegated |
354 | * | |
355 | * The caller must hold the i_mutex on the affected object. | |
356 | * | |
357 | * If notify_change discovers a delegation in need of breaking, | |
358 | * it will return -EWOULDBLOCK and return a reference to the inode in | |
359 | * delegated_inode. The caller should then break the delegation and | |
360 | * retry. Because breaking a delegation may take a long time, the | |
361 | * caller should drop the i_mutex before doing so. | |
362 | * | |
363 | * Alternatively, a caller may pass NULL for delegated_inode. This may | |
364 | * be appropriate for callers that expect the underlying filesystem not | |
365 | * to be NFS exported. Also, passing NULL is fine for callers holding | |
366 | * the file open for write, as there can be no conflicting delegation in | |
367 | * that case. | |
2f221d6f CB |
368 | * |
369 | * If the inode has been found through an idmapped mount the user namespace of | |
370 | * the vfsmount must be passed through @mnt_userns. This function will then | |
371 | * take care to map the inode according to @mnt_userns before checking | |
372 | * permissions. On non-idmapped mounts or if permission checking is to be | |
373 | * performed on the raw inode simply passs init_user_ns. | |
27ac0ffe | 374 | */ |
2f221d6f CB |
375 | int notify_change(struct user_namespace *mnt_userns, struct dentry *dentry, |
376 | struct iattr *attr, struct inode **delegated_inode) | |
1da177e4 LT |
377 | { |
378 | struct inode *inode = dentry->d_inode; | |
8d334acd | 379 | umode_t mode = inode->i_mode; |
1da177e4 | 380 | int error; |
95582b00 | 381 | struct timespec64 now; |
1da177e4 LT |
382 | unsigned int ia_valid = attr->ia_valid; |
383 | ||
5955102c | 384 | WARN_ON_ONCE(!inode_is_locked(inode)); |
c4107b30 | 385 | |
7bb698f0 AG |
386 | error = may_setattr(mnt_userns, inode, ia_valid); |
387 | if (error) | |
388 | return error; | |
f2b20f6e | 389 | |
69b45732 | 390 | if ((ia_valid & ATTR_MODE)) { |
8d334acd | 391 | umode_t amode = attr->ia_mode; |
69b45732 AK |
392 | /* Flag setting protected by i_mutex */ |
393 | if (is_sxid(amode)) | |
394 | inode->i_flags &= ~S_NOSEC; | |
395 | } | |
396 | ||
c2050a45 | 397 | now = current_time(inode); |
1da177e4 LT |
398 | |
399 | attr->ia_ctime = now; | |
400 | if (!(ia_valid & ATTR_ATIME_SET)) | |
401 | attr->ia_atime = now; | |
eb31e2f6 AG |
402 | else |
403 | attr->ia_atime = timestamp_truncate(attr->ia_atime, inode); | |
1da177e4 LT |
404 | if (!(ia_valid & ATTR_MTIME_SET)) |
405 | attr->ia_mtime = now; | |
eb31e2f6 AG |
406 | else |
407 | attr->ia_mtime = timestamp_truncate(attr->ia_mtime, inode); | |
408 | ||
b5376771 | 409 | if (ia_valid & ATTR_KILL_PRIV) { |
b5376771 | 410 | error = security_inode_need_killpriv(dentry); |
030b533c | 411 | if (error < 0) |
b5376771 | 412 | return error; |
030b533c JK |
413 | if (error == 0) |
414 | ia_valid = attr->ia_valid &= ~ATTR_KILL_PRIV; | |
b5376771 | 415 | } |
6de0ec00 JL |
416 | |
417 | /* | |
418 | * We now pass ATTR_KILL_S*ID to the lower level setattr function so | |
419 | * that the function has the ability to reinterpret a mode change | |
420 | * that's due to these bits. This adds an implicit restriction that | |
421 | * no function will ever call notify_change with both ATTR_MODE and | |
422 | * ATTR_KILL_S*ID set. | |
423 | */ | |
424 | if ((ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) && | |
425 | (ia_valid & ATTR_MODE)) | |
426 | BUG(); | |
427 | ||
1da177e4 | 428 | if (ia_valid & ATTR_KILL_SUID) { |
1da177e4 | 429 | if (mode & S_ISUID) { |
6de0ec00 JL |
430 | ia_valid = attr->ia_valid |= ATTR_MODE; |
431 | attr->ia_mode = (inode->i_mode & ~S_ISUID); | |
1da177e4 LT |
432 | } |
433 | } | |
434 | if (ia_valid & ATTR_KILL_SGID) { | |
1da177e4 LT |
435 | if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { |
436 | if (!(ia_valid & ATTR_MODE)) { | |
437 | ia_valid = attr->ia_valid |= ATTR_MODE; | |
438 | attr->ia_mode = inode->i_mode; | |
439 | } | |
440 | attr->ia_mode &= ~S_ISGID; | |
441 | } | |
442 | } | |
6de0ec00 | 443 | if (!(attr->ia_valid & ~(ATTR_KILL_SUID | ATTR_KILL_SGID))) |
1da177e4 LT |
444 | return 0; |
445 | ||
a475acf0 SF |
446 | /* |
447 | * Verify that uid/gid changes are valid in the target | |
448 | * namespace of the superblock. | |
449 | */ | |
450 | if (ia_valid & ATTR_UID && | |
b27c82e1 CB |
451 | !vfsuid_has_fsmapping(mnt_userns, inode->i_sb->s_user_ns, |
452 | attr->ia_vfsuid)) | |
a475acf0 SF |
453 | return -EOVERFLOW; |
454 | if (ia_valid & ATTR_GID && | |
b27c82e1 CB |
455 | !vfsgid_has_fsmapping(mnt_userns, inode->i_sb->s_user_ns, |
456 | attr->ia_vfsgid)) | |
a475acf0 SF |
457 | return -EOVERFLOW; |
458 | ||
0bd23d09 EB |
459 | /* Don't allow modifications of files with invalid uids or |
460 | * gids unless those uids & gids are being made valid. | |
461 | */ | |
2f221d6f | 462 | if (!(ia_valid & ATTR_UID) && |
b27c82e1 | 463 | !vfsuid_valid(i_uid_into_vfsuid(mnt_userns, inode))) |
0bd23d09 | 464 | return -EOVERFLOW; |
2f221d6f | 465 | if (!(ia_valid & ATTR_GID) && |
b27c82e1 | 466 | !vfsgid_valid(i_gid_into_vfsgid(mnt_userns, inode))) |
0bd23d09 EB |
467 | return -EOVERFLOW; |
468 | ||
b27c82e1 | 469 | error = security_inode_setattr(mnt_userns, dentry, attr); |
27ac0ffe BF |
470 | if (error) |
471 | return error; | |
472 | error = try_break_deleg(inode, delegated_inode); | |
a77b72da MS |
473 | if (error) |
474 | return error; | |
475 | ||
eef2380c | 476 | if (inode->i_op->setattr) |
549c7297 | 477 | error = inode->i_op->setattr(mnt_userns, dentry, attr); |
eef2380c | 478 | else |
549c7297 | 479 | error = simple_setattr(mnt_userns, dentry, attr); |
1da177e4 | 480 | |
975d2943 | 481 | if (!error) { |
0eeca283 | 482 | fsnotify_change(dentry, ia_valid); |
a2d2329e | 483 | ima_inode_post_setattr(mnt_userns, dentry); |
975d2943 MZ |
484 | evm_inode_post_setattr(dentry, ia_valid); |
485 | } | |
0eeca283 | 486 | |
1da177e4 LT |
487 | return error; |
488 | } | |
1da177e4 | 489 | EXPORT_SYMBOL(notify_change); |