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-5,10.128.0.63' (ECDSA) to the list of known hosts. 2017/11/14 03:28:35 parsed 1 programs 2017/11/14 03:28:35 executed programs: 0 syzkaller login: [ 40.794590] IPVS: Creating netns size=2536 id=1 [ 40.867301] ------------[ cut here ]------------ [ 40.872071] WARNING: CPU: 0 PID: 3247 at kernel/signal.c:334 task_participate_group_stop+0x224/0x2d0 [ 40.881301] Kernel panic - not syncing: panic_on_warn set ... [ 40.881301] [ 40.888624] CPU: 0 PID: 3247 Comm: syz-executor0 Not tainted 4.9.61-gd55e630 #87 [ 40.896117] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.905435] ffff8801cbfd7ae0 ffffffff81d91589 ffffffff83a46ba0 ffff8801cbfd7bb8 [ 40.913379] ffffffff83a4d600 ffffffff8115d564 0000000000000009 ffff8801cbfd7ba8 [ 40.921335] ffffffff8142e391 0000000041b58ab3 ffffffff84185e28 ffffffff8142e1d5 [ 40.929283] Call Trace: [ 40.931836] [] dump_stack+0xc1/0x128 [ 40.937175] [] ? task_participate_group_stop+0x224/0x2d0 [ 40.944240] [] panic+0x1bc/0x3a8 [ 40.949220] [] ? percpu_up_read_preempt_enable.constprop.54+0xd7/0xd7 [ 40.957410] [] ? load_image_and_restore+0xf9/0xf9 [ 40.963880] [] ? task_participate_group_stop+0x224/0x2d0 [ 40.970943] [] __warn+0x1c4/0x1e0 [ 40.976006] [] ? recalc_sigpending_tsk+0x102/0x150 [ 40.982548] [] warn_slowpath_null+0x2c/0x40 [ 40.988484] [] task_participate_group_stop+0x224/0x2d0 [ 40.995373] [] ? do_signal_stop+0x38a/0x7b0 [ 41.001305] [] do_signal_stop+0x19b/0x7b0 [ 41.007063] [] get_signal+0x430/0x14e0 [ 41.012562] [] do_signal+0x87/0x1960 [ 41.017888] [] ? memset+0x31/0x40 [ 41.022954] [] ? __hrtimer_init+0x106/0x1d0 [ 41.028889] [] ? setup_sigcontext+0x7d0/0x7d0 [ 41.034994] [] ? hrtimer_run_queues+0x210/0x210 [ 41.041276] [] ? exit_to_usermode_loop+0xac/0x120 [ 41.047731] [] exit_to_usermode_loop+0xe1/0x120 [ 41.054020] [] syscall_return_slowpath+0x1a0/0x1e0 [ 41.060563] [] entry_SYSCALL_64_fastpath+0xc4/0xc6