[....] Starting enhanced syslogd: rsyslogd[ 10.801686] audit: type=1400 audit(1514656672.409:4): avc: denied { syslog } for pid=3167 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.423744] ------------[ cut here ]------------ [ 19.424558] WARNING: CPU: 0 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x224/0x2d0 [ 19.425756] Kernel panic - not syncing: panic_on_warn set ... [ 19.425756] [ 19.426724] CPU: 0 PID: 1 Comm: init Not tainted 4.9.73-gf3f3457 #11 [ 19.427576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.428814] ffff8801da217ae0 ffffffff81d922b9 ffffffff83a46d00 ffff8801da217bb8 [ 19.429956] ffffffff83a4d800 ffffffff8115a9c4 0000000000000009 ffff8801da217ba8 [ 19.431081] ffffffff8142d741 0000000041b58ab3 ffffffff84189000 ffffffff8142d585 [ 19.432206] Call Trace: [ 19.432579] [] dump_stack+0xc1/0x128 [ 19.433304] [] ? task_participate_group_stop+0x224/0x2d0 [ 19.434238] [] panic+0x1bc/0x3a8 [ 19.434941] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 19.436018] [] ? load_image_and_restore+0xf9/0xf9 [ 19.436877] [] ? __warn+0x1a9/0x1e0 [ 19.437574] [] ? task_participate_group_stop+0x224/0x2d0 [ 19.438502] [] __warn+0x1c4/0x1e0 [ 19.439179] [] ? recalc_sigpending_tsk+0x102/0x150 [ 19.440052] [] warn_slowpath_null+0x2c/0x40 [ 19.440837] [] task_participate_group_stop+0x224/0x2d0 [ 19.441760] [] ? do_signal_stop+0x38a/0x7b0 [ 19.442544] [] do_signal_stop+0x19b/0x7b0 [ 19.443307] [] get_signal+0x430/0x14e0 [ 19.445202] [] do_signal+0x87/0x1a00 [ 19.450529] [] ? poll_select_copy_remaining+0x27d/0x3a0 [ 19.457505] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 19.464047] [] ? setup_sigcontext+0x7d0/0x7d0 [ 19.470157] [] ? kvm_clock_get_cycles+0x9/0x10 [ 19.476354] [] ? ktime_get_ts64+0x1ea/0x2c0 [ 19.482292] [] ? poll_select_set_timeout+0xa6/0x110 [ 19.488919] [] ? timespec64_add_safe+0x10c/0x170 [ 19.495285] [] ? SyS_select+0x176/0x1e0 [ 19.500873] [] ? core_sys_select+0x730/0x730 [ 19.506891] [] ? exit_to_usermode_loop+0xac/0x120 [ 19.513344] [] exit_to_usermode_loop+0xe1/0x120 [ 19.519626] [] syscall_return_slowpath+0x1a0/0x1e0 [ 19.526169] [] entry_SYSCALL_64_fastpath+0xc4/0xc6 [ 19.533217] Dumping ftrace buffer: [ 19.536756] (ftrace buffer empty) [ 19.540429] Kernel Offset: disabled [ 19.544030] Rebooting in 86400 seconds..