Btrfs: fix em leak in find_first_block_group

commit 187ee58c62c1d0d238d3dc4835869d33e1869906 upstream.

We need to call free_extent_map() on the em we look up.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2b7cba4fc8f1cd16f18b901056bc19b1275787ab..abfd2320873dcd851b879e44dbdd9e4f629ad827 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -9518,6 +9518,7 @@ static int find_first_block_group(struct btrfs_root *root,
                        } else {
                                ret = 0;
                        }
+                       free_extent_map(em);
                        goto out;
                }
                path->slots[0]++;