bcachefs: Fix "btree node in stripe" error

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index f131a70f282fc63db6a0f4e6713e10c13f6fb810..e9470c06b1fa84c1abbdec67c01d449ac335a250 100644 (file)
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -915,6 +915,9 @@ static int ec_stripe_update_extent(struct btree_trans *trans,
                b = bch2_backpointer_get_node(trans, &node_iter, bucket, *bp_offset, bp);
                bch2_trans_iter_exit(trans, &node_iter);
 
+               if (!b)
+                       return 0;
+
                prt_printf(&buf, "found btree node in erasure coded bucket: b=%px\n", b);
                bch2_backpointer_to_text(&buf, &bp);