diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index f6395e8288d69b5dc95ca6d24dbc994bac9bed45..892005f756cfc1597e0febc4146e937867499d90 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -2742,8 +2742,10 @@ raid56_alloc_missing_rbio(struct bio *bio, struct btrfs_io_context *bioc)
 
 	rbio->faila = find_logical_bio_stripe(rbio, bio);
 	if (rbio->faila == -1) {
-		BUG();
-		kfree(rbio);
+		btrfs_warn_rl(fs_info,
+	"can not determine the failed stripe number for full stripe %llu",
+			      bioc->raid_map[0]);
+		__free_raid_bio(rbio);
 		return NULL;
 	}