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>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0eb1f09512514a229182ed6e96cc608e6f31168a..40a62b98008700a7429c93b2b8ca116eb7a3cb8d 100644 (file)
--- 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 */