Commit aa65fa35 authored Aug 04, 2015 by Al Viro

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>

parent 97242f99

fs/namei.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;