From: Jeff Mahoney Date: Tue, 20 Dec 2016 18:28:27 +0000 (-0500) Subject: btrfs: fix error handling when run_delayed_extent_op fails X-Git-Tag: C0P2-H0.0--20200415~10610 X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=7a1dcd92fd396cd66f60b51fb102171d8dee460d;p=linux.git btrfs: fix error handling when run_delayed_extent_op fails commit aa7c8da35d1905d80e840d075f07d26ec90144b5 upstream. In __btrfs_run_delayed_refs, the error path when run_delayed_extent_op fails sets locked_ref->processing = 0 but doesn't re-increment delayed_refs->num_heads_ready. As a result, we end up triggering the WARN_ON in btrfs_select_ref_head. Fixes: d7df2c796d7 (Btrfs: attach delayed ref updates to delayed ref heads) Reported-by: Jon Nelson Signed-off-by: Jeff Mahoney Reviewed-by: Liu Bo Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 265d44127b1e..5909ae8c6731 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2587,7 +2587,10 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, */ if (must_insert_reserved) locked_ref->must_insert_reserved = 1; + spin_lock(&delayed_refs->lock); locked_ref->processing = 0; + delayed_refs->num_heads_ready++; + spin_unlock(&delayed_refs->lock); btrfs_debug(fs_info, "run_delayed_extent_op returned %d", ret);