From 5dbc0d798074ac19ee04ad42d4b9f09d54d85b68 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Fri, 1 Oct 2021 13:48:18 +0100
Subject: [PATCH] btrfs: check for error when looking up inode during dir entry replay
Git-commit: cfd312695b71df04c3a2597859ff12c470d1e2e4
Patch-mainline: v5.15-rc6
References: stable-5.14.14

commit cfd312695b71df04c3a2597859ff12c470d1e2e4 upstream.

At replay_one_name(), we are treating any error from btrfs_lookup_inode()
as if the inode does not exists. Fix this by checking for an error and
returning it to the caller.

Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 fs/btrfs/tree-log.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 5477de95f0fa..17f0de5bb873 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1941,8 +1941,8 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
 	struct btrfs_key log_key;
 	struct inode *dir;
 	u8 log_type;
-	int exists;
-	int ret = 0;
+	bool exists;
+	int ret;
 	bool update_size = (key->type == BTRFS_DIR_INDEX_KEY);
 	bool name_added = false;
 
@@ -1962,12 +1962,12 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
 		   name_len);
 
 	btrfs_dir_item_key_to_cpu(eb, di, &log_key);
-	exists = btrfs_lookup_inode(trans, root, path, &log_key, 0);
-	if (exists == 0)
-		exists = 1;
-	else
-		exists = 0;
+	ret = btrfs_lookup_inode(trans, root, path, &log_key, 0);
 	btrfs_release_path(path);
+	if (ret < 0)
+		goto out;
+	exists = (ret == 0);
+	ret = 0;
 
 	if (key->type == BTRFS_DIR_ITEM_KEY) {
 		dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid,
-- 
2.26.2