INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] 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 'ci-upstream-mmots-kasan-gce-3,10.128.0.56' (ECDSA) to the list of known hosts.
2017/11/14 03:44:24 parsed 1 programs
2017/11/14 03:44:24 executed programs: 0
syzkaller login: [   30.708445] WARNING: CPU: 1 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230
[   30.709778] Kernel panic - not syncing: panic_on_warn set ...
[   30.709778] 
[   30.710749] CPU: 1 PID: 1 Comm: init Not tainted 4.14.0-rc8-mm1+ #21
[   30.711620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.712852] Call Trace:
[   30.713211]  dump_stack+0x194/0x257
[   30.713704]  ? arch_local_irq_restore+0x53/0x53
[   30.714332]  ? vsnprintf+0x1ed/0x1900
[   30.714849]  panic+0x1e4/0x41c
[   30.715284]  ? refcount_error_report+0x214/0x214
[   30.715916]  ? show_regs_print_info+0x65/0x65
[   30.716520]  ? __warn+0x1c1/0x200
[   30.716990]  ? task_participate_group_stop+0x1ce/0x230
[   30.717688]  __warn+0x1dc/0x200
[   30.718133]  ? task_participate_group_stop+0x1ce/0x230
[   30.718836]  report_bug+0x211/0x2d0
[   30.719366]  fixup_bug+0x40/0x90
[   30.719822]  do_trap+0x260/0x390
[   30.720294]  ? map_id_up+0x23b/0x420
[   30.720810]  do_error_trap+0x120/0x390
[   30.721334]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   30.722025]  ? do_trap+0x390/0x390
[   30.722500]  ? find_held_lock+0x39/0x1d0
[   30.723043]  ? task_participate_group_stop+0x1ce/0x230
[   30.723751]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   30.724403]  do_invalid_op+0x1b/0x20
[   30.724903]  invalid_op+0x18/0x20
[   30.725366] RIP: 0010:task_participate_group_stop+0x1ce/0x230
[   30.726140] RSP: 0018:ffff8801da2e78c8 EFLAGS: 00010093
[   30.726868] RAX: ffff8801da2d8040 RBX: ffff8801da2d8040 RCX: ffffffff814436ee
[   30.727869] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801da2d84c0
[   30.730782] RBP: ffff8801da2e78e0 R08: 1ffffffff0d2717b R09: 000000000000000c
[   30.738016] R10: 0000000000000000 R11: ffffffff8746ada0 R12: ffff8801da2e9840
[   30.745251] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801da2d85b8
[   30.752498]  ? task_participate_group_stop+0x1ce/0x230
[   30.757744]  ? task_participate_group_stop+0x1ce/0x230
[   30.762985]  ? do_signal_stop+0x486/0x910
[   30.767097]  do_signal_stop+0x217/0x910
[   30.771046]  ? ptrace_do_notify+0x310/0x310
[   30.775335]  ? __lock_is_held+0xbc/0x140
[   30.779376]  get_signal+0x55a/0x16c0
[   30.783068]  ? ptrace_notify+0x130/0x130
[   30.787104]  ? lock_downgrade+0x980/0x980
[   30.791220]  ? find_held_lock+0x39/0x1d0
[   30.795279]  do_signal+0x94/0x1ee0
[   30.798799]  ? lock_release+0xda0/0xda0
[   30.802740]  ? trace_event_raw_event_sched_switch+0x8a0/0x8a0
[   30.808592]  ? setup_sigcontext+0x7d0/0x7d0
[   30.812887]  ? __might_sleep+0x95/0x190
[   30.816843]  ? poll_select_copy_remaining+0x38f/0x620
[   30.822006]  ? poll_schedule_timeout+0x1f0/0x1f0
[   30.826735]  ? exit_to_usermode_loop+0x8c/0x310
[   30.831379]  exit_to_usermode_loop+0x214/0x310
[   30.835928]  ? do_restart_poll+0x2a0/0x2a0
[   30.840136]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   30.845640]  ? kasan_check_write+0x14/0x20
[   30.849849]  syscall_return_slowpath+0x490/0x550
[   30.854571]  ? prepare_exit_to_usermode+0x340/0x340
[   30.859555]  ? entry_SYSCALL_64_fastpath+0x69/0x96
[   30.864452]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   30.869442]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   30.874170]  entry_SYSCALL_64_fastpath+0x94/0x96
[   30.878890] RIP: 0033:0x7f830e6f9dd3
[   30.882569] RSP: 002b:00007ffe70be5dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
[   30.890244] RAX: fffffffffffffdfe RBX: 00007ffe70be5f70 RCX: 00007f830e6f9dd3
[   30.897481] RDX: 0000000000000000 RSI: 00007ffe70be6120 RDI: 000000000000000b
[   30.904719] RBP: 00007ffe70be6120 R08: 00007ffe70be61a0 R09: 0000000000000001
[   30.911955] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[   30.919191] R13: 00007ffe70be6500 R14: 0000000000000000 R15: 0000000000000000
[   30.926626] Dumping ftrace buffer:
[   30.930190]    (ftrace buffer empty)
[   30.933866] Kernel Offset: disabled
[   30.937463] Rebooting in 86400 seconds..