On Mon 29-01-24 17:15:05, syzbot wrote: > syzbot suspects this issue was fixed by commit: > > commit 6f861765464f43a71462d52026fbddfc858239a5 > Author: Jan Kara <jack@xxxxxxx> > Date: Wed Nov 1 17:43:10 2023 +0000 > > fs: Block writes to mounted block devices > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=116642dfe80000 > start commit: d88520ad73b7 Merge tag 'pull-nfsd-fix' of git://git.kernel.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=174a257c5ae6b4fd > dashboard link: https://syzkaller.appspot.com/bug?extid=69b40dc5fd40f32c199f > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a77593680000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1104a593680000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: fs: Block writes to mounted block devices This doesn't look correct. The problem here really is that sysv is calling sb_bread() under a RWLOCK - pointers_lock - in get_block(). Which more or less shows nobody has run sysv in ages because otherwise the chances of sleeping in atomic context are really high? Perhaps another candidate for removal? Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
