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-kasan-gce-386-1,10.128.15.204' (ECDSA) to the list of known hosts.
2017/11/06 02:07:03 parsed 1 programs
2017/11/06 02:07:03 executed programs: 0
syzkaller login: [   63.283939] ------------[ cut here ]------------
[   63.284700] WARNING: CPU: 0 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230
[   63.285878] Kernel panic - not syncing: panic_on_warn set ...
[   63.285878] 
[   63.286844] CPU: 0 PID: 1 Comm: init Not tainted 4.14.0-rc7+ #73
[   63.287697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.288914] Call Trace:
[   63.289271]  dump_stack+0x194/0x257
[   63.289762]  ? arch_local_irq_restore+0x53/0x53
[   63.290394]  panic+0x1e4/0x417
[   63.290827]  ? __warn+0x1d9/0x1d9
[   63.291291]  ? show_regs_print_info+0x65/0x65
[   63.291903]  ? task_participate_group_stop+0x1ce/0x230
[   63.292600]  __warn+0x1c4/0x1d9
[   63.293065]  ? task_participate_group_stop+0x1ce/0x230
[   63.293766]  report_bug+0x211/0x2d0
[   63.294262]  fixup_bug+0x40/0x90
[   63.294720]  do_trap+0x260/0x390
[   63.295182]  do_error_trap+0x120/0x390
[   63.295704]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   63.296383]  ? do_trap+0x390/0x390
[   63.296890]  ? task_participate_group_stop+0x1ce/0x230
[   63.297597]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   63.298247]  do_invalid_op+0x1b/0x20
[   63.298746]  invalid_op+0x18/0x20
[   63.299215] RIP: 0010:task_participate_group_stop+0x1ce/0x230
[   63.299990] RSP: 0018:ffff8801d9edf8b8 EFLAGS: 00010097
[   63.300714] RAX: ffff8801d9ed4040 RBX: ffff8801d9ed4040 RCX: 0000000000000012
[   63.301668] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ed44d0
[   63.302641] RBP: ffff8801d9edf8d0 R08: ffffffff814392fc R09: 000000000000000c
[   63.303630] R10: ffff8801d9edf7b0 R11: 0000000000000000 R12: ffff8801d9ee1740
[   63.308086] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ed45c8
[   63.315335]  ? ptrace_stop+0x5bc/0xa40
[   63.319194]  ? task_participate_group_stop+0x1ce/0x230
[   63.324436]  ? do_signal_stop+0x486/0x910
[   63.328550]  do_signal_stop+0x217/0x910
[   63.332496]  ? ptrace_do_notify+0x310/0x310
[   63.336786]  ? __lock_is_held+0xb6/0x140
[   63.340824]  get_signal+0x55a/0x16d0
[   63.344513]  ? ptrace_notify+0x130/0x130
[   63.348549]  ? poll_select_copy_remaining+0x160/0x6e0
[   63.353709]  ? lock_downgrade+0x990/0x990
[   63.357825]  ? find_held_lock+0x35/0x1d0
[   63.361867]  do_signal+0x94/0x1ee0
[   63.365376]  ? lock_release+0xa40/0xa40
[   63.369319]  ? check_same_owner+0x320/0x320
[   63.373608]  ? ktime_get_ts64+0x328/0x4d0
[   63.377729]  ? setup_sigcontext+0x7d0/0x7d0
[   63.382016]  ? __might_sleep+0x95/0x190
[   63.385965]  ? kasan_check_read+0x11/0x20
[   63.390077]  ? _copy_to_user+0xa2/0xc0
[   63.393933]  ? poll_select_copy_remaining+0x3ef/0x6e0
[   63.399091]  ? poll_schedule_timeout+0x1f0/0x1f0
[   63.403815]  ? exit_to_usermode_loop+0x8c/0x310
[   63.408455]  exit_to_usermode_loop+0x214/0x310
[   63.413003]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   63.418505]  ? kasan_check_write+0x14/0x20
[   63.422711]  syscall_return_slowpath+0x42f/0x510
[   63.427434]  ? prepare_exit_to_usermode+0x2d0/0x2d0
[   63.432420]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   63.437316]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   63.442298]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   63.447024]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   63.451747] RIP: 0033:0x7f8521ce2dd3
[   63.455424] RSP: 002b:00007ffcd92023c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
[   63.463095] RAX: fffffffffffffdfe RBX: 00007ffcd9202570 RCX: 00007f8521ce2dd3
[   63.470331] RDX: 0000000000000000 RSI: 00007ffcd9202720 RDI: 000000000000000b
[   63.477566] RBP: 00007ffcd9202720 R08: 00007ffcd92027a0 R09: 0000000000000001
[   63.484819] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[   63.492055] R13: 00007ffcd9202b00 R14: 0000000000000000 R15: 0000000000000000
[   63.499442] Dumping ftrace buffer:
[   63.502997]    (ftrace buffer empty)
[   63.506676] Kernel Offset: disabled
[   63.510274] Rebooting in 86400 seconds..