[PATCH 4.14 032/156] btrfs: Fix transaction abort during failure in btrfs_rm_dev_item

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nikolay Borisov <nbori...@suse.com>


[ Upstream commit 5e9f2ad5b2904a7e81df6d9a3dbef29478952eac ]

btrfs_rm_dev_item calls several function under an active transaction,
however it fails to abort it if an error happens. Fix this by adding
explicit btrfs_abort_transaction/btrfs_end_transaction calls.

Signed-off-by: Nikolay Borisov <nbori...@suse.com>
Reviewed-by: David Sterba <dste...@suse.com>
Signed-off-by: David Sterba <dste...@suse.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/btrfs/volumes.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1765,20 +1765,24 @@ static int btrfs_rm_dev_item(struct btrf
        key.offset = device->devid;
 
        ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
-       if (ret < 0)
-               goto out;
-
-       if (ret > 0) {
-               ret = -ENOENT;
+       if (ret) {
+               if (ret > 0)
+                       ret = -ENOENT;
+               btrfs_abort_transaction(trans, ret);
+               btrfs_end_transaction(trans);
                goto out;
        }
 
        ret = btrfs_del_item(trans, root, path);
-       if (ret)
-               goto out;
+       if (ret) {
+               btrfs_abort_transaction(trans, ret);
+               btrfs_end_transaction(trans);
+       }
+
 out:
        btrfs_free_path(path);
-       btrfs_commit_transaction(trans);
+       if (!ret)
+               ret = btrfs_commit_transaction(trans);
        return ret;
 }