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-2,10.128.0.38' (ECDSA) to the list of known hosts. 2017/11/06 02:04:55 parsed 1 programs 2017/11/06 02:04:55 executed programs: 0 syzkaller login: [ 67.548255] IPVS: Creating netns size=2536 id=1 [ 67.617760] ------------[ cut here ]------------ [ 67.622532] WARNING: CPU: 1 PID: 3280 at kernel/signal.c:334 task_participate_group_stop+0x224/0x2d0 [ 67.631765] Kernel panic - not syncing: panic_on_warn set ... [ 67.631765] [ 67.639097] CPU: 1 PID: 3280 Comm: syz-executor0 Not tainted 4.9.60-gdfe0a9b #81 [ 67.646594] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.655912] ffff8801d1df7ae0 ffffffff81d91389 ffffffff83a46ba0 ffff8801d1df7bb8 [ 67.663854] ffffffff83a4d600 ffffffff8115d564 0000000000000009 ffff8801d1df7ba8 [ 67.671792] ffffffff8142e391 0000000041b58ab3 ffffffff84185bc8 ffffffff8142e1d5 [ 67.679732] Call Trace: [ 67.682284] [] dump_stack+0xc1/0x128 [ 67.687609] [] ? task_participate_group_stop+0x224/0x2d0 [ 67.694674] [] panic+0x1bc/0x3a8 [ 67.699653] [] ? percpu_up_read_preempt_enable.constprop.54+0xd7/0xd7 [ 67.707844] [] ? load_image_and_restore+0xf9/0xf9 [ 67.714307] [] ? task_participate_group_stop+0x224/0x2d0 [ 67.721369] [] __warn+0x1c4/0x1e0 [ 67.726434] [] ? recalc_sigpending_tsk+0x102/0x150 [ 67.732974] [] warn_slowpath_null+0x2c/0x40 [ 67.738907] [] task_participate_group_stop+0x224/0x2d0 [ 67.745795] [] ? do_signal_stop+0x38a/0x7b0 [ 67.751727] [] do_signal_stop+0x19b/0x7b0 [ 67.757492] [] get_signal+0x430/0x14e0 [ 67.762994] [] do_signal+0x87/0x1960 [ 67.768321] [] ? memset+0x31/0x40 [ 67.773386] [] ? __hrtimer_init+0x106/0x1d0 [ 67.779317] [] ? setup_sigcontext+0x7d0/0x7d0 [ 67.785422] [] ? hrtimer_run_queues+0x210/0x210 [ 67.791703] [] ? exit_to_usermode_loop+0xac/0x120 [ 67.798155] [] exit_to_usermode_loop+0xe1/0x120 [ 67.804438] [] syscall_return_slowpath+0x1a0/0x1e0 [ 67.810982] [] entry_SYSCALL_64_fastpath+0xc4/0xc6