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-android-49-kasan-gce-4,10.128.15.215' (ECDSA) to the list of known hosts. 2017/10/19 04:09:27 parsed 1 programs 2017/10/19 04:09:27 executed programs: 0 syzkaller login: [ 83.443310] IPVS: Creating netns size=2536 id=1 [ 83.503174] ------------[ cut here ]------------ [ 83.507948] WARNING: CPU: 1 PID: 3280 at kernel/signal.c:334 task_participate_group_stop+0x224/0x2d0 [ 83.517182] Kernel panic - not syncing: panic_on_warn set ... [ 83.517182] [ 83.524510] CPU: 1 PID: 3280 Comm: syz-executor0 Not tainted 4.9.57-gf8de76a #68 [ 83.532006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.541327] ffff8801cd207a20 ffffffff81d93cf9 ffffffff83a46b40 ffff8801cd207af8 [ 83.549274] ffffffff83a4d600 ffffffff8115d5a4 0000000000000009 ffff8801cd207ae8 [ 83.557220] ffffffff8142ecd1 0000000041b58ab3 ffffffff841859b8 ffffffff8142eb15 [ 83.565167] Call Trace: [ 83.567722] [] dump_stack+0xc1/0x128 [ 83.573051] [] ? task_participate_group_stop+0x224/0x2d0 [ 83.580114] [] panic+0x1bc/0x3a8 [ 83.585094] [] ? percpu_up_read_preempt_enable.constprop.54+0xd7/0xd7 [ 83.593284] [] ? load_image_and_restore+0xf9/0xf9 [ 83.599743] [] ? task_participate_group_stop+0x224/0x2d0 [ 83.606806] [] __warn+0x1c4/0x1e0 [ 83.611877] [] warn_slowpath_null+0x2c/0x40 [ 83.617811] [] task_participate_group_stop+0x224/0x2d0 [ 83.624701] [] ? do_signal_stop+0x38a/0x7b0 [ 83.630636] [] do_signal_stop+0x19b/0x7b0 [ 83.636397] [] get_signal+0x4bc/0x1600 [ 83.641900] [] do_signal+0x87/0x1960 [ 83.647227] [] ? memset+0x31/0x40 [ 83.652295] [] ? __hrtimer_init+0x102/0x190 [ 83.658230] [] ? setup_sigcontext+0x7d0/0x7d0 [ 83.664341] [] ? hrtimer_nanosleep+0x2e8/0x780 [ 83.670537] [] ? hrtimer_run_queues+0x210/0x210 [ 83.676821] [] ? __hrtimer_init+0x190/0x190 [ 83.682759] [] exit_to_usermode_loop+0xe5/0x130 [ 83.689039] [] syscall_return_slowpath+0x1a0/0x1e0 [ 83.695587] [] entry_SYSCALL_64_fastpath+0xc4/0xc6