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Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode 

Use d_is_positive(dentry) or d_is_negative(dentry) rather than testing
dentry->d_inode as the dentry may cover another layer that has an inode when
the top layer doesn't or may hold a 0,0 chardev that's actually a whiteout.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2015-01-29 12:02:31 +00:00 committed by Al Viro
parent 7ac2856d99
commit 729b8a3dee
1 changed files with 1 additions and 1 deletions
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2
security/apparmor/path.c
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@ -114,7 +114,7 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
* security_path hooks as a deleted dentry except without an inode * security_path hooks as a deleted dentry except without an inode
* allocated. * allocated.
*/ */
if (d_unlinked(path->dentry) && path->dentry->d_inode && if (d_unlinked(path->dentry) && d_is_positive(path->dentry) &&
!(flags & PATH_MEDIATE_DELETED)) { !(flags & PATH_MEDIATE_DELETED)) {
error = -ENOENT; error = -ENOENT;
goto out; goto out;