Hello, syzbot found the following issue on: HEAD commit: 1e1b28b936ae Add linux-next specific files for 20220513 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=10872211f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e4eb3c0c4b289571 dashboard link: https://syzkaller.appspot.com/bug?extid=987d7bb19195ae45208c compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1141bd21f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167ebdbef00000 The issue was bisected to: commit 6da69b1da130e7d96766042750cd9f902e890eba Author: Xiaomeng Tong <xiam0nd.tong@xxxxxxxxx> Date: Mon Mar 28 03:24:31 2022 +0000 net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1652eb11f00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1552eb11f00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1152eb11f00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+987d7bb19195ae45208c@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 6da69b1da130 ("net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator") ==================================== WARNING: iou-wrk-3613/3623 still has locks held! 5.18.0-rc6-next-20220513-syzkaller #0 Not tainted ------------------------------------ 1 lock held by iou-wrk-3613/3623: #0: ffff888140bfe0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock+0x75/0xc0 fs/io_uring.c:1494 stack backtrace: CPU: 0 PID: 3623 Comm: iou-wrk-3613 Not tainted 5.18.0-rc6-next-20220513-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 try_to_freeze include/linux/freezer.h:66 [inline] get_signal+0x1424/0x2600 kernel/signal.c:2647 io_wqe_worker+0x64b/0xdb0 fs/io-wq.c:663 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:297 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
