bcachefs: Fix transaction path overflow in fiemap

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index 2aaeee58515731d15860f6a07db06cb84723c620..310e317738b9c8b25c12b604e44606a40596f7a0 100644 (file)
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -935,7 +935,8 @@ retry:
        bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
                             SPOS(ei->v.i_ino, start, snapshot), 0);
 
-       while ((k = bch2_btree_iter_peek(&iter)).k &&
+       while (!(ret = btree_trans_too_many_iters(&trans)) &&
+              (k = bch2_btree_iter_peek(&iter)).k &&
               !(ret = bkey_err(k)) &&
               bkey_cmp(iter.pos, end) < 0) {
                enum btree_id data_btree = BTREE_ID_extents;