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may_follow_link() should use nd->inode 

Now that we can get there in RCU mode, we shouldn't play with
nd->path.dentry->d_inode - it's not guaranteed to be stable.
Use nd->inode instead.

Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-08-04 23:23:50 -04:00
parent 97242f99a0
commit aa65fa35ba
1 changed files with 1 additions and 1 deletions
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2
fs/namei.c
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@ -879,7 +879,7 @@ static inline int may_follow_link(struct nameidata *nd)
return 0;
/* Allowed if parent directory not sticky and world-writable. */
parent = nd->path.dentry->d_inode;
parent = nd->inode;
if ((parent->i_mode & (S_ISVTX|S_IWOTH)) != (S_ISVTX|S_IWOTH))
return 0;