On Mon, Oct 07, 2024 at 02:53:13AM GMT, Piotr Zalewski wrote: > > Add check for read node's btree_id against BTREE_ID_NR_MAX in > > try_read_btree_node to prevent triggering EBUG_ON condition in > > bch2_btree_id_root[1]. > > There seems to be some kind of (pro)regression regarding this issue. Now it > triggers a deadlock. I also found related bug detected by syzbot[2] for > which someone supplied the same patch recently and it triggered the same > deadlock. I will look into it (perhaps simple check isn't a proper fix > here). > > > [1] https://syzkaller.appspot.com/bug?extid=cf7b2215b5d70600ec00 > > [2] https://syzkaller.appspot.com/bug?extid=9f41e4b255897d99d4e9
Your patch looks correct, [2] shouldn't be possible with it - and it appears to only be reported on upstream commits. I'll apply your patch.
