[....] Starting enhanced syslogd: rsyslogd[ 10.731677] audit: type=1400 audit(1514488441.617:4): avc: denied { syslog } for pid=3177 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.233321] ------------[ cut here ]------------ [ 22.234078] WARNING: CPU: 0 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x224/0x2d0 [ 22.235252] Kernel panic - not syncing: panic_on_warn set ... [ 22.235252] [ 22.236352] CPU: 0 PID: 1 Comm: init Not tainted 4.9.72-gcb7518e #10 [ 22.237214] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.238452] ffff8801da217ae0 ffffffff81d922b9 ffffffff83a46d00 ffff8801da217bb8 [ 22.239579] ffffffff83a4d800 ffffffff8115a9c4 0000000000000009 ffff8801da217ba8 [ 22.240701] ffffffff8142d741 0000000041b58ab3 ffffffff84189000 ffffffff8142d585 [ 22.241856] Call Trace: [ 22.242228] [] dump_stack+0xc1/0x128 [ 22.242937] [] ? task_participate_group_stop+0x224/0x2d0 [ 22.243901] [] panic+0x1bc/0x3a8 [ 22.244564] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 22.245651] [] ? load_image_and_restore+0xf9/0xf9 [ 22.246556] [] ? __warn+0x1a9/0x1e0 [ 22.247253] [] ? task_participate_group_stop+0x224/0x2d0 [ 22.248221] [] __warn+0x1c4/0x1e0 [ 22.248924] [] ? recalc_sigpending_tsk+0x102/0x150 [ 22.249812] [] warn_slowpath_null+0x2c/0x40 [ 22.250598] [] task_participate_group_stop+0x224/0x2d0 [ 22.251507] [] ? do_signal_stop+0x38a/0x7b0 [ 22.252318] [] do_signal_stop+0x19b/0x7b0 [ 22.253082] [] get_signal+0x430/0x14e0 [ 22.256440] [] do_signal+0x87/0x1a00 [ 22.261771] [] ? poll_select_copy_remaining+0x27d/0x3a0 [ 22.268758] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 22.275310] [] ? setup_sigcontext+0x7d0/0x7d0 [ 22.281420] [] ? kvm_clock_get_cycles+0x9/0x10 [ 22.287618] [] ? ktime_get_ts64+0x1ea/0x2c0 [ 22.293552] [] ? poll_select_set_timeout+0xa6/0x110 [ 22.300184] [] ? timespec64_add_safe+0x10c/0x170 [ 22.306555] [] ? SyS_select+0x176/0x1e0 [ 22.312154] [] ? core_sys_select+0x730/0x730 [ 22.318177] [] ? exit_to_usermode_loop+0xac/0x120 [ 22.324636] [] exit_to_usermode_loop+0xe1/0x120 [ 22.330932] [] syscall_return_slowpath+0x1a0/0x1e0 [ 22.337477] [] entry_SYSCALL_64_fastpath+0xc4/0xc6 [ 22.344461] Dumping ftrace buffer: [ 22.347994] (ftrace buffer empty) [ 22.351684] Kernel Offset: disabled [ 22.355290] Rebooting in 86400 seconds..