[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.667917][ T24] audit: type=1800 audit(1555120144.413:25): pid=7573 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.706758][ T24] audit: type=1800 audit(1555120144.413:26): pid=7573 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.745435][ T24] audit: type=1800 audit(1555120144.413:27): pid=7573 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 '10.128.10.4' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.940185][ T7728] WARNING: CPU: 1 PID: 7728 at kernel/kthread.c:399 __kthread_bind_mask+0x3b/0xc0 [ 72.949479][ T7728] Kernel panic - not syncing: panic_on_warn set ... [ 72.956060][ T7728] CPU: 1 PID: 7728 Comm: syz-executor869 Not tainted 5.1.0-rc4-next-20190412 #24 [ 72.965139][ T7728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.975179][ T7728] Call Trace: [ 72.978447][ T7728] dump_stack+0x172/0x1f0 [ 72.982755][ T7728] ? __kthread_bind_mask+0x20/0xc0 [ 72.987874][ T7728] panic+0x2cb/0x72b [ 72.991751][ T7728] ? __warn_printk+0xf3/0xf3 [ 72.996320][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.001402][ T7728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.007613][ T7728] ? __warn.cold+0x5/0x46 [ 73.011917][ T7728] ? __warn+0xe8/0x1d0 [ 73.016112][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.021214][ T7728] __warn.cold+0x20/0x46 [ 73.025441][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.030535][ T7728] report_bug+0x263/0x2b0 [ 73.034851][ T7728] do_error_trap+0x11b/0x200 [ 73.039415][ T7728] do_invalid_op+0x37/0x50 [ 73.043801][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.049064][ T7728] invalid_op+0x14/0x20 [ 73.053197][ T7728] RIP: 0010:__kthread_bind_mask+0x3b/0xc0 [ 73.058913][ T7728] Code: 48 89 fb e8 f7 ab 24 00 4c 89 e6 48 89 df e8 ac e1 02 00 31 ff 49 89 c4 48 89 c6 e8 7f ad 24 00 4d 85 e4 75 15 e8 d5 ab 24 00 <0f> 0b e8 ce ab 24 00 5b 41 5c 41 5d 41 5e 5d c3 e8 c0 ab 24 00 4c [ 73.078650][ T7728] RSP: 0018:ffff8880a563fbb8 EFLAGS: 00010293 [ 73.084703][ T7728] RAX: ffff888091a1e180 RBX: ffff88808dddc680 RCX: ffffffff814bdd11 [ 73.092648][ T7728] RDX: 0000000000000000 RSI: ffffffff814bdd1b RDI: 0000000000000007 [ 73.100594][ T7728] RBP: ffff8880a563fbd8 R08: ffff888091a1e180 R09: 0000000000000000 [ 73.108537][ T7728] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 73.116486][ T7728] R13: ffffffff87691150 R14: ffff88808dddc6a0 R15: ffffffff81c91e10 [ 73.124453][ T7728] ? io_ring_ctx_wait_and_kill+0x510/0x510 [ 73.130259][ T7728] ? __kthread_bind_mask+0x31/0xc0 [ 73.135341][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.140428][ T7728] ? __kthread_bind_mask+0x3b/0xc0 [ 73.145525][ T7728] kthread_unpark+0x123/0x160 [ 73.150177][ T7728] kthread_stop+0xfa/0x6c0 [ 73.154569][ T7728] io_finish_async+0xab/0x180 [ 73.159455][ T7728] io_ring_ctx_wait_and_kill+0x133/0x510 [ 73.165077][ T7728] io_uring_release+0x42/0x50 [ 73.169728][ T7728] __fput+0x2e5/0x8d0 [ 73.173692][ T7728] ____fput+0x16/0x20 [ 73.177651][ T7728] task_work_run+0x14a/0x1c0 [ 73.182218][ T7728] do_exit+0x90a/0x2fa0 [ 73.186346][ T7728] ? mm_update_next_owner+0x640/0x640 [ 73.191697][ T7728] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.197127][ T7728] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.202557][ T7728] do_group_exit+0x135/0x370 [ 73.207118][ T7728] __x64_sys_exit_group+0x44/0x50 [ 73.212117][ T7728] do_syscall_64+0x103/0x610 [ 73.216714][ T7728] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.222602][ T7728] RIP: 0033:0x43ee98 [ 73.226491][ T7728] Code: Bad RIP value. [ 73.230530][ T7728] RSP: 002b:00007ffd01b8a1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 73.238911][ T7728] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee98 [ 73.246870][ T7728] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 73.254820][ T7728] RBP: 00000000004be6a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 73.262766][ T7728] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 73.270710][ T7728] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 73.279403][ T7728] Kernel Offset: disabled [ 73.283769][ T7728] Rebooting in 86400 seconds..