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-next-kasan-gce-7,10.128.0.4' (ECDSA) to the list of known hosts.
2017/11/06 02:06:30 parsed 1 programs
2017/11/06 02:06:30 executed programs: 0
syzkaller login: [   63.621494] ------------[ cut here ]------------
[   63.622245] WARNING: CPU: 0 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230
[   63.623451] Kernel panic - not syncing: panic_on_warn set ...
[   63.623451] 
[   63.624419] CPU: 0 PID: 1 Comm: init Not tainted 4.14.0-rc7-next-20171103+ #38
[   63.625383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.626613] Call Trace:
[   63.626972]  dump_stack+0x194/0x257
[   63.627465]  ? arch_local_irq_restore+0x53/0x53
[   63.628092]  ? vsnprintf+0x1ed/0x1900
[   63.628608]  panic+0x1e4/0x41c
[   63.629041]  ? refcount_error_report+0x214/0x214
[   63.629686]  ? show_regs_print_info+0x65/0x65
[   63.630297]  ? __warn+0x1a9/0x1e0
[   63.630768]  ? task_participate_group_stop+0x1ce/0x230
[   63.631467]  __warn+0x1c4/0x1e0
[   63.631911]  ? task_participate_group_stop+0x1ce/0x230
[   63.632615]  report_bug+0x211/0x2d0
[   63.633122]  fixup_bug+0x40/0x90
[   63.633590]  do_trap+0x260/0x390
[   63.634044]  ? map_id_up+0x23b/0x420
[   63.634575]  do_error_trap+0x120/0x390
[   63.635095]  ? find_held_lock+0x39/0x1d0
[   63.635648]  ? do_trap+0x390/0x390
[   63.636125]  ? task_participate_group_stop+0x1ce/0x230
[   63.636837]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   63.637489]  do_invalid_op+0x1b/0x20
[   63.637987]  invalid_op+0x18/0x20
[   63.638454] RIP: 0010:task_participate_group_stop+0x1ce/0x230
[   63.639245] RSP: 0018:ffff8801d9ee78b8 EFLAGS: 00010093
[   63.639972] RAX: ffff8801d9ed8040 RBX: ffff8801d9ed8040 RCX: ffffffff81441a7e
[   63.640925] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ed84c0
[   63.641918] RBP: ffff8801d9ee78d0 R08: e085ce875e243443 R09: 0000000000000000
[   63.649153] R10: 0000000000000001 R11: ffffffff8744cca0 R12: ffff8801d9ee9840
[   63.656388] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ed85b8
[   63.663724]  ? task_participate_group_stop+0x1ce/0x230
[   63.668972]  ? task_participate_group_stop+0x1ce/0x230
[   63.674213]  ? do_signal_stop+0x486/0x910
[   63.678325]  do_signal_stop+0x217/0x910
[   63.682270]  ? ptrace_do_notify+0x310/0x310
[   63.686559]  ? __lock_is_held+0xbc/0x140
[   63.690600]  get_signal+0x55a/0x16d0
[   63.694288]  ? ptrace_notify+0x130/0x130
[   63.698319]  ? lock_downgrade+0x990/0x990
[   63.702434]  ? find_held_lock+0x39/0x1d0
[   63.706470]  ? lock_downgrade+0x990/0x990
[   63.710590]  do_signal+0x94/0x1ee0
[   63.714095]  ? __might_fault+0xe0/0x1d0
[   63.718043]  ? lock_release+0xd70/0xd70
[   63.721984]  ? setup_sigcontext+0x7d0/0x7d0
[   63.726282]  ? __might_sleep+0x95/0x190
[   63.730230]  ? _copy_to_user+0xa2/0xc0
[   63.734087]  ? poll_select_copy_remaining+0x38f/0x620
[   63.739246]  ? exit_to_usermode_loop+0x8c/0x310
[   63.743887]  exit_to_usermode_loop+0x214/0x310
[   63.748437]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   63.753940]  ? kasan_check_write+0x14/0x20
[   63.758148]  syscall_return_slowpath+0x42f/0x510
[   63.762870]  ? prepare_exit_to_usermode+0x2d0/0x2d0
[   63.767858]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   63.772757]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   63.777740]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   63.782468]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   63.787186] RIP: 0033:0x7f1d2d879dd3
[   63.790861] RSP: 002b:00007ffc0aeae7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
[   63.798531] RAX: fffffffffffffdfe RBX: 00007ffc0aeae990 RCX: 00007f1d2d879dd3
[   63.805764] RDX: 0000000000000000 RSI: 00007ffc0aeaeb40 RDI: 000000000000000b
[   63.812997] RBP: 00007ffc0aeaeb40 R08: 00007ffc0aeaebc0 R09: 0000000000000001
[   63.820234] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[   63.827468] R13: 00007ffc0aeaef20 R14: 0000000000000000 R15: 0000000000000000
[   63.835154] Dumping ftrace buffer:
[   63.838694]    (ftrace buffer empty)
[   63.842372] Kernel Offset: disabled
[   63.845966] Rebooting in 86400 seconds..