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-8,10.128.15.211' (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: [   76.109904] ------------[ cut here ]------------
[   76.110673] WARNING: CPU: 0 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230
[   76.111863] Kernel panic - not syncing: panic_on_warn set ...
[   76.111863] 
[   76.112829] CPU: 0 PID: 1 Comm: init Not tainted 4.14.0-rc7+ #163
[   76.113656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   76.114905] Call Trace:
[   76.115289]  dump_stack+0x194/0x257
[   76.115782]  ? arch_local_irq_restore+0x53/0x53
[   76.116479]  panic+0x1e4/0x417
[   76.116922]  ? __warn+0x1d9/0x1d9
[   76.117389]  ? show_regs_print_info+0x65/0x65
[   76.118027]  ? task_participate_group_stop+0x1ce/0x230
[   76.118744]  __warn+0x1c4/0x1d9
[   76.119187]  ? task_participate_group_stop+0x1ce/0x230
[   76.119891]  report_bug+0x211/0x2d0
[   76.120402]  fixup_bug+0x40/0x90
[   76.120868]  do_trap+0x260/0x390
[   76.121328]  do_error_trap+0x120/0x390
[   76.121850]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   76.122529]  ? do_trap+0x390/0x390
[   76.123030]  ? task_participate_group_stop+0x1ce/0x230
[   76.123758]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   76.124453]  do_invalid_op+0x1b/0x20
[   76.124954]  invalid_op+0x18/0x20
[   76.125420] RIP: 0010:task_participate_group_stop+0x1ce/0x230
[   76.126226] RSP: 0018:ffff8801d9edf8b8 EFLAGS: 00010097
[   76.126936] RAX: ffff8801d9ed4040 RBX: ffff8801d9ed4040 RCX: 0000000000000012
[   76.127908] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ed44d0
[   76.128861] RBP: ffff8801d9edf8d0 R08: ffffffff814392fc R09: 000000000000000c
[   76.129830] R10: ffff8801d9edf7b0 R11: 0000000000000000 R12: ffff8801d9ee1740
[   76.131503] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ed45c8
[   76.138753]  ? ptrace_stop+0x5bc/0xa40
[   76.142616]  ? task_participate_group_stop+0x1ce/0x230
[   76.147859]  ? do_signal_stop+0x486/0x910
[   76.151980]  do_signal_stop+0x217/0x910
[   76.155926]  ? ptrace_do_notify+0x310/0x310
[   76.160216]  ? __lock_is_held+0xb6/0x140
[   76.164255]  get_signal+0x55a/0x16d0
[   76.167942]  ? ptrace_notify+0x130/0x130
[   76.171989]  ? poll_select_copy_remaining+0x160/0x6e0
[   76.177147]  ? lock_downgrade+0x990/0x990
[   76.181265]  ? find_held_lock+0x35/0x1d0
[   76.185309]  do_signal+0x94/0x1ee0
[   76.188824]  ? lock_release+0xa40/0xa40
[   76.192766]  ? check_same_owner+0x320/0x320
[   76.197055]  ? ktime_get_ts64+0x328/0x4d0
[   76.201174]  ? setup_sigcontext+0x7d0/0x7d0
[   76.205468]  ? __might_sleep+0x95/0x190
[   76.209421]  ? kasan_check_read+0x11/0x20
[   76.213536]  ? _copy_to_user+0xa2/0xc0
[   76.217396]  ? poll_select_copy_remaining+0x3ef/0x6e0
[   76.222557]  ? poll_schedule_timeout+0x1f0/0x1f0
[   76.227285]  ? exit_to_usermode_loop+0x8c/0x310
[   76.231927]  exit_to_usermode_loop+0x214/0x310
[   76.236481]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   76.241995]  ? kasan_check_write+0x14/0x20
[   76.246216]  syscall_return_slowpath+0x42f/0x510
[   76.250943]  ? prepare_exit_to_usermode+0x2d0/0x2d0
[   76.255929]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   76.260834]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   76.265819]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   76.270550]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   76.275270] RIP: 0033:0x7f2e64060dd3
[   76.278948] RSP: 002b:00007ffe7cff4ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
[   76.286623] RAX: fffffffffffffdfe RBX: 00007ffe7cff4e50 RCX: 00007f2e64060dd3
[   76.293860] RDX: 0000000000000000 RSI: 00007ffe7cff5000 RDI: 000000000000000b
[   76.301096] RBP: 00007ffe7cff5000 R08: 00007ffe7cff5080 R09: 0000000000000001
[   76.308331] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[   76.315566] R13: 00007ffe7cff53e0 R14: 0000000000000000 R15: 0000000000000000
[   76.322973] Dumping ftrace buffer:
[   76.326548]    (ftrace buffer empty)
[   76.330224] Kernel Offset: disabled
[   76.333819] Rebooting in 86400 seconds..