[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.498024][ T26] audit: type=1800 audit(1555106942.283:25): pid=7723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.525968][ T26] audit: type=1800 audit(1555106942.283:26): pid=7723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.559716][ T26] audit: type=1800 audit(1555106942.283:27): pid=7723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.845780][ T7874] WARNING: CPU: 1 PID: 7874 at kernel/kthread.c:398 __kthread_bind_mask+0x3b/0xc0 [ 47.854996][ T7874] Kernel panic - not syncing: panic_on_warn set ... [ 47.861565][ T7874] CPU: 1 PID: 7874 Comm: syz-executor323 Not tainted 5.1.0-rc4+ #64 [ 47.869515][ T7874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.879552][ T7874] Call Trace: [ 47.882825][ T7874] dump_stack+0x172/0x1f0 [ 47.887138][ T7874] ? __kthread_cancel_work+0x280/0x2e0 [ 47.892578][ T7874] panic+0x2cb/0x65c [ 47.896456][ T7874] ? __warn_printk+0xf3/0xf3 [ 47.901039][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 47.906138][ T7874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.912359][ T7874] ? __warn.cold+0x5/0x45 [ 47.916677][ T7874] ? __warn+0xe8/0x1d0 [ 47.920752][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 47.925843][ T7874] __warn.cold+0x20/0x45 [ 47.930082][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 47.935186][ T7874] report_bug+0x263/0x2b0 [ 47.939499][ T7874] do_error_trap+0x11b/0x200 [ 47.944073][ T7874] do_invalid_op+0x37/0x50 [ 47.948470][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 47.953583][ T7874] invalid_op+0x14/0x20 [ 47.957755][ T7874] RIP: 0010:__kthread_bind_mask+0x3b/0xc0 [ 47.963456][ T7874] Code: 48 89 fb e8 27 88 24 00 4c 89 e6 48 89 df e8 dc e7 02 00 31 ff 49 89 c4 48 89 c6 e8 af 89 24 00 4d 85 e4 75 15 e8 05 88 24 00 <0f> 0b e8 fe 87 24 00 5b 41 5c 41 5d 41 5e 5d c3 e8 f0 87 24 00 4c [ 47.983558][ T7874] RSP: 0018:ffff8880898a7bb8 EFLAGS: 00010293 [ 47.989610][ T7874] RAX: ffff8880a922c500 RBX: ffff888093e56200 RCX: ffffffff814c06f1 [ 47.997562][ T7874] RDX: 0000000000000000 RSI: ffffffff814c06fb RDI: 0000000000000007 [ 48.005509][ T7874] RBP: ffff8880898a7bd8 R08: ffff8880a922c500 R09: 0000000000000000 [ 48.013456][ T7874] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 48.021407][ T7874] R13: ffffffff87691088 R14: ffff888093e56220 R15: ffffffff81c801d0 [ 48.029371][ T7874] ? io_ring_ctx_wait_and_kill+0x510/0x510 [ 48.035162][ T7874] ? __kthread_bind_mask+0x31/0xc0 [ 48.040273][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 48.045387][ T7874] ? __kthread_bind_mask+0x3b/0xc0 [ 48.050486][ T7874] kthread_unpark+0x123/0x160 [ 48.055142][ T7874] kthread_stop+0xfa/0x6c0 [ 48.059539][ T7874] io_finish_async+0xab/0x180 [ 48.064194][ T7874] io_ring_ctx_wait_and_kill+0x133/0x510 [ 48.069802][ T7874] io_uring_release+0x42/0x50 [ 48.074466][ T7874] __fput+0x2e5/0x8d0 [ 48.078431][ T7874] ____fput+0x16/0x20 [ 48.082408][ T7874] task_work_run+0x14a/0x1c0 [ 48.087003][ T7874] do_exit+0x90a/0x2fa0 [ 48.091166][ T7874] ? mm_update_next_owner+0x640/0x640 [ 48.097159][ T7874] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.102616][ T7874] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.108058][ T7874] do_group_exit+0x135/0x370 [ 48.112629][ T7874] __x64_sys_exit_group+0x44/0x50 [ 48.117636][ T7874] do_syscall_64+0x103/0x610 [ 48.122211][ T7874] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.128080][ T7874] RIP: 0033:0x43ee98 [ 48.131982][ T7874] Code: Bad RIP value. [ 48.136030][ T7874] RSP: 002b:00007ffc6c8cfb28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 48.144418][ T7874] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee98 [ 48.152391][ T7874] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 48.160355][ T7874] RBP: 00000000004be6a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 48.168325][ T7874] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 48.176282][ T7874] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 48.185534][ T7874] Kernel Offset: disabled [ 48.196377][ T7874] Rebooting in 86400 seconds..