Btrfs: fix extent_buffer leak in the metadata IO error handling

The scrub readahead branch brought in a new error handling hook,
but it was leaking extent_buffer references.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0eb1f0951251..40a62b980087 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -644,6 +644,7 @@ static int btree_io_failed_hook(struct bio *failed_bio,
                 clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags);
                 btree_readahead_hook(root, eb, eb->start, -EIO);
         }
+        free_extent_buffer(eb);
 
 out:
         return -EIO;    /* we fixed nothing */