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-4,10.128.0.27' (ECDSA) to the list of known hosts.
2017/10/19 04:11:33 parsed 1 programs
2017/10/19 04:11:33 executed programs: 0
syzkaller login: [   45.595538] ------------[ cut here ]------------
[   45.596315] WARNING: CPU: 0 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230
[   45.597490] Kernel panic - not syncing: panic_on_warn set ...
[   45.597490] 
[   45.598468] CPU: 0 PID: 1 Comm: init Not tainted 4.14.0-rc5-next-20171017+ #35
[   45.599432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.600660] Call Trace:
[   45.601016]  dump_stack+0x194/0x257
[   45.601507]  ? arch_local_irq_restore+0x53/0x53
[   45.602135]  ? vsnprintf+0x1ed/0x1900
[   45.602726]  panic+0x1e4/0x41c
[   45.603160]  ? refcount_error_report+0x214/0x214
[   45.603793]  ? show_regs_print_info+0x65/0x65
[   45.604400]  ? __warn+0x1a9/0x1e0
[   45.604872]  ? task_participate_group_stop+0x1ce/0x230
[   45.605571]  __warn+0x1c4/0x1e0
[   45.606110]  ? task_participate_group_stop+0x1ce/0x230
[   45.606814]  report_bug+0x211/0x2d0
[   45.607321]  fixup_bug+0x40/0x90
[   45.607776]  do_trap+0x260/0x390
[   45.608240]  do_error_trap+0x120/0x390
[   45.608762]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   45.609442]  ? do_trap+0x390/0x390
[   45.609920]  ? task_participate_group_stop+0x1ce/0x230
[   45.610641]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   45.611291]  do_invalid_op+0x1b/0x20
[   45.611801]  invalid_op+0x18/0x20
[   45.612270] RIP: 0010:task_participate_group_stop+0x1ce/0x230
[   45.613067] RSP: 0018:ffff8801d9edf8b8 EFLAGS: 00010093
[   45.613794] RAX: ffff8801d9ece040 RBX: ffff8801d9ece040 RCX: ffffffff8143baee
[   45.614745] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ece4c0
[   45.616032] RBP: ffff8801d9edf8d0 R08: ffffffff814416fc R09: 000000000000000c
[   45.623268] R10: ffff8801d9edf7b0 R11: 0000000000000000 R12: ffff8801d9ed7740
[   45.630506] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ece5b8
[   45.637755]  ? ptrace_stop+0x5bc/0xa40
[   45.641611]  ? task_participate_group_stop+0x1ce/0x230
[   45.646863]  ? task_participate_group_stop+0x1ce/0x230
[   45.652109]  ? do_signal_stop+0x486/0x910
[   45.656227]  do_signal_stop+0x217/0x910
[   45.660174]  ? ptrace_do_notify+0x310/0x310
[   45.664465]  ? __lock_is_held+0xb6/0x140
[   45.668503]  get_signal+0x55a/0x16d0
[   45.672194]  ? ptrace_notify+0x130/0x130
[   45.676227]  ? find_held_lock+0x35/0x1d0
[   45.680262]  ? poll_select_copy_remaining+0x152/0x620
[   45.685419]  ? lock_downgrade+0x990/0x990
[   45.689535]  ? find_held_lock+0x35/0x1d0
[   45.693567]  do_signal+0x94/0x1ee0
[   45.697077]  ? __might_fault+0x110/0x1d0
[   45.701104]  ? lock_downgrade+0x990/0x990
[   45.705222]  ? lock_release+0xa40/0xa40
[   45.709164]  ? setup_sigcontext+0x7d0/0x7d0
[   45.713460]  ? __might_sleep+0x95/0x190
[   45.717411]  ? _copy_to_user+0xa2/0xc0
[   45.721269]  ? poll_select_copy_remaining+0x38f/0x620
[   45.726428]  ? exit_to_usermode_loop+0x8c/0x310
[   45.731070]  exit_to_usermode_loop+0x214/0x310
[   45.735623]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   45.741128]  ? kasan_check_write+0x14/0x20
[   45.745337]  syscall_return_slowpath+0x42f/0x510
[   45.750060]  ? prepare_exit_to_usermode+0x2d0/0x2d0
[   45.755045]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   45.759941]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   45.764924]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   45.769653]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   45.774376] RIP: 0033:0x7f6eef173dd3
[   45.778054] RSP: 002b:00007ffe826babe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
[   45.785730] RAX: fffffffffffffdfe RBX: 00007ffe826bad90 RCX: 00007f6eef173dd3
[   45.792973] RDX: 0000000000000000 RSI: 00007ffe826baf40 RDI: 000000000000000b
[   45.800212] RBP: 00007ffe826baf40 R08: 00007ffe826bafc0 R09: 0000000000000001
[   45.807449] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[   45.814683] R13: 00007ffe826bb320 R14: 0000000000000000 R15: 0000000000000000
[   45.822085] Dumping ftrace buffer:
[   45.825685]    (ftrace buffer empty)
[   45.829371] Kernel Offset: disabled
[   45.832970] Rebooting in 86400 seconds..