[ 38.533238][ T26] audit: type=1800 audit(1555105812.594:25): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.561255][ T26] audit: type=1800 audit(1555105812.594:26): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.593217][ T26] audit: type=1800 audit(1555105812.594:27): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 38.624480][ T26] audit: type=1800 audit(1555105812.594:28): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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 '10.128.0.86' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.745634][ T7864] WARNING: CPU: 1 PID: 7864 at kernel/kthread.c:398 __kthread_bind_mask+0x3b/0xc0 [ 59.754919][ T7864] Kernel panic - not syncing: panic_on_warn set ... [ 59.761519][ T7864] CPU: 1 PID: 7864 Comm: syz-executor215 Not tainted 5.1.0-rc4+ #65 [ 59.769667][ T7864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.779721][ T7864] Call Trace: [ 59.783095][ T7864] dump_stack+0x172/0x1f0 [ 59.787465][ T7864] ? __kthread_cancel_work+0x280/0x2e0 [ 59.792917][ T7864] panic+0x2cb/0x65c [ 59.796974][ T7864] ? __warn_printk+0xf3/0xf3 [ 59.801548][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.806680][ T7864] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.812974][ T7864] ? __warn.cold+0x5/0x45 [ 59.817316][ T7864] ? __warn+0xe8/0x1d0 [ 59.821440][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.826725][ T7864] __warn.cold+0x20/0x45 [ 59.830967][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.836076][ T7864] report_bug+0x263/0x2b0 [ 59.840452][ T7864] do_error_trap+0x11b/0x200 [ 59.845033][ T7864] do_invalid_op+0x37/0x50 [ 59.849432][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.854535][ T7864] invalid_op+0x14/0x20 [ 59.858681][ T7864] RIP: 0010:__kthread_bind_mask+0x3b/0xc0 [ 59.864395][ T7864] 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 [ 59.883996][ T7864] RSP: 0018:ffff8880a4007bb8 EFLAGS: 00010293 [ 59.890050][ T7864] RAX: ffff88808db8a080 RBX: ffff8880a872a180 RCX: ffffffff814c06f1 [ 59.898018][ T7864] RDX: 0000000000000000 RSI: ffffffff814c06fb RDI: 0000000000000007 [ 59.906075][ T7864] RBP: ffff8880a4007bd8 R08: ffff88808db8a080 R09: 0000000000000000 [ 59.914044][ T7864] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 59.922008][ T7864] R13: ffffffff87691088 R14: ffff8880a872a1a0 R15: ffffffff81c801d0 [ 59.930144][ T7864] ? io_ring_ctx_wait_and_kill+0x510/0x510 [ 59.936157][ T7864] ? __kthread_bind_mask+0x31/0xc0 [ 59.941248][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.946358][ T7864] ? __kthread_bind_mask+0x3b/0xc0 [ 59.951566][ T7864] kthread_unpark+0x123/0x160 [ 59.956235][ T7864] kthread_stop+0xfa/0x6c0 [ 59.960643][ T7864] io_finish_async+0xab/0x180 [ 59.965312][ T7864] io_ring_ctx_wait_and_kill+0x133/0x510 [ 59.971018][ T7864] io_uring_release+0x42/0x50 [ 59.975694][ T7864] __fput+0x2e5/0x8d0 [ 59.979671][ T7864] ____fput+0x16/0x20 [ 59.983659][ T7864] task_work_run+0x14a/0x1c0 [ 59.988246][ T7864] do_exit+0x90a/0x2fa0 [ 59.992472][ T7864] ? mm_update_next_owner+0x640/0x640 [ 59.997849][ T7864] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.003291][ T7864] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.008741][ T7864] do_group_exit+0x135/0x370 [ 60.013520][ T7864] __x64_sys_exit_group+0x44/0x50 [ 60.018540][ T7864] do_syscall_64+0x103/0x610 [ 60.023172][ T7864] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.029061][ T7864] RIP: 0033:0x43ee98 [ 60.033066][ T7864] Code: Bad RIP value. [ 60.037120][ T7864] RSP: 002b:00007fff21ca3c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 60.045518][ T7864] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee98 [ 60.053494][ T7864] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 60.061459][ T7864] RBP: 00000000004be6a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 60.069429][ T7864] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 60.077388][ T7864] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 60.086325][ T7864] Kernel Offset: disabled [ 60.090722][ T7864] Rebooting in 86400 seconds..