[PATCH 3.16 150/305] ext4: avoid possible double brelse() in add_new_gdb() on error path

[Ben Hutchings]

3.16.63-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Theodore Ts'o <ty...@mit.edu>

commit 4f32c38b4662312dd3c5f113d8bdd459887fb773 upstream.

Fixes: b40971426a83 ("ext4: add error checking to calls to ...")
Reported-by: Vasily Averin <v...@virtuozzo.com>
Signed-off-by: Theodore Ts'o <ty...@mit.edu>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 fs/ext4/resize.c | 1 +
 1 file changed, 1 insertion(+)

--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -845,6 +845,7 @@ static int add_new_gdb(handle_t *handle,
        err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
        if (unlikely(err)) {
                ext4_std_error(sb, err);
+               iloc.bh = NULL;
                goto exit_inode;
        }
        brelse(dind);