ext4: Fix null bh pointer dereference in mballoc
Repoted by Adrian Bunk <bunk@kernel.org>:
The Coverity checker spotted the following NULL dereference:
static int ext4_mb_mark_diskspace_used
{
...
if (!bitmap_bh)
goto out_err;
...
out_err:
sb->s_dirt = 1;
put_bh(bitmap_bh);
...
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 76e5fed..06d1f52 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3069,7 +3069,7 @@
out_err:
sb->s_dirt = 1;
- put_bh(bitmap_bh);
+ brelse(bitmap_bh);
return err;
}