From: Qu Wenruo <wqu@xxxxxxxx>
commit 4b654acdae850f48b8250b9a578a4eaa518c7a6f upstream.
In btrfs_read_block_groups(), if we have an invalid block group which
has mixed type (DATA|METADATA) while the fs doesn't have MIXED_GROUPS
feature, we error out without freeing the block group cache.
This patch will add the missing btrfs_put_block_group() to prevent
memory leak.
Note for stable backports: the file to patch in versions <= 5.3 is
fs/btrfs/extent-tree.c
Fixes: 49303381f19a ("Btrfs: bail out if block group has different mixed flag")
CC: stable@xxxxxxxxxxxxxxx # 4.9+
Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent-tree.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8117,6 +8117,7 @@ int btrfs_read_block_groups(struct btrfs
btrfs_err(info,
"bg %llu is a mixed block group but filesystem hasn't enabled mixed block groups",
cache->key.objectid);
+ btrfs_put_block_group(cache);
ret = -EINVAL;
goto error;
}
