[PATCH 5.6 001/106] ubifs: Fix ubifs_tnc_lookup() usage in do_kill_orphans()

[Greg Kroah-Hartman]

From: Richard Weinberger <richard@xxxxxx>

commit 4ab25ac8b2b5514151d5f91cf9514df08dd26938 upstream.

Orphans are allowed to point to deleted inodes.
So -ENOENT is not a fatal error.

Reported-by: ÐÐÑÐÑÐÐÐ ÐÐÐÑÐÐ <fido_max@xxxxxxxx>
Reported-and-tested-by: "Christian Berger" <Christian.Berger@xxxxxxxxxxxx>
Tested-by: Karl Olsen <karl@xxxxxxxxxxxxxxxxx>
Tested-by: Jef Driesen <jef.driesen@xxxxxxx>
Fixes: ee1438ce5dc4 ("ubifs: Check link count of inodes when killing orphans.")
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Cc: Christian Eggers <ceggers@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/ubifs/orphan.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -688,14 +688,14 @@ static int do_kill_orphans(struct ubifs_
 
 			ino_key_init(c, &key1, inum);
 			err = ubifs_tnc_lookup(c, &key1, ino);
-			if (err)
+			if (err && err != -ENOENT)
 				goto out_free;
 
 			/*
 			 * Check whether an inode can really get deleted.
 			 * linkat() with O_TMPFILE allows rebirth of an inode.
 			 */
-			if (ino->nlink == 0) {
+			if (err == 0 && ino->nlink == 0) {
 				dbg_rcvry("deleting orphaned inode %lu",
 					  (unsigned long)inum);