[....] Starting enhanced syslogd: rsyslogd[ 12.568706] audit: type=1400 audit(1521711096.142:4): avc: denied { syslog } for pid=3633 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.10.4' (ECDSA) to the list of known hosts. 2018/03/22 09:31:49 parsed 1 programs 2018/03/22 09:31:49 executed programs: 0 syzkaller login: [ 26.298033] IPVS: Creating netns size=2536 id=1 [ 26.367096] ------------[ cut here ]------------ [ 26.371874] WARNING: CPU: 1 PID: 3790 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.380620] Kernel panic - not syncing: panic_on_warn set ... [ 26.380620] [ 26.387953] CPU: 1 PID: 3790 Comm: syz-execprog Not tainted 4.9.88-g71df7bb #8 [ 26.395282] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.404610] ffff8801db307cb8 ffffffff81d95f19 ffffffff83a482a0 ffff8801db307d90 [ 26.412572] ffffffff83f2fd00 ffffffff832f0056 0000000000000009 ffff8801db307d80 [ 26.420542] ffffffff8142fa71 0000000041b58ab3 ffffffff8418bc48 ffffffff8142f8b5 [ 26.428498] Call Trace: [ 26.431049] [ 26.433082] [] dump_stack+0xc1/0x128 [ 26.438437] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.444728] [] panic+0x1bc/0x3a8 [ 26.449712] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.457906] [] ? load_image_and_restore+0xf9/0xf9 [ 26.464366] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 26.471089] [] ? __warn+0x1a9/0x1e0 [ 26.476332] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.482616] [] __warn+0x1c4/0x1e0 [ 26.487689] [] warn_slowpath_null+0x2c/0x40 [ 26.493627] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.500348] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.506550] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.512838] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.519295] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.525778] [] __sk_destruct+0x53/0x570 [ 26.531369] [] rcu_process_callbacks+0x898/0x1300 [ 26.537827] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.544462] [] ? __sk_dst_check+0x240/0x240 [ 26.550401] [] __do_softirq+0x206/0x951 [ 26.556002] [] irq_exit+0x165/0x190 [ 26.561247] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.567706] [] apic_timer_interrupt+0xa0/0xb0 [ 26.573820] [ 26.575853] [] ? wake_up_q+0x34/0xe0 [ 26.581199] [] futex_wake+0x3a0/0x440 [ 26.586614] [] ? get_futex_key+0x1050/0x1050 [ 26.592649] [] ? __mutex_unlock_slowpath+0x25a/0x3d0 [ 26.599370] [] ? __ww_mutex_lock_interruptible+0x14a0/0x14a0 [ 26.606783] [] do_futex+0x780/0x15c0 [ 26.612116] [] ? ep_poll+0x9c0/0x9c0 [ 26.617446] [] ? mutex_unlock+0x9/0x10 [ 26.622949] [] ? ep_scan_ready_list+0x554/0x820 [ 26.629233] [] ? exit_robust_list+0x230/0x230 [ 26.635343] [] ? ep_eventpoll_release+0x60/0x60 [ 26.641630] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 26.648531] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 26.655336] [] ? ep_poll+0x1a8/0x9c0 [ 26.660668] [] ? ep_poll_readyevents_proc+0xa0/0xa0 [ 26.667300] [] ? check_preemption_disabled+0x3b/0x200 [ 26.674105] [] SyS_futex+0x226/0x2d0 [ 26.679433] [] ? __fget+0x231/0x3b0 [ 26.684675] [] ? do_futex+0x15c0/0x15c0 [ 26.690265] [] ? __fget_light+0x169/0x1f0 [ 26.696031] [] ? fput+0xd2/0x140 [ 26.701014] [] ? do_syscall_64+0x48/0x490 [ 26.706778] [] ? do_futex+0x15c0/0x15c0 [ 26.712368] [] do_syscall_64+0x1a4/0x490 [ 26.718045] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 26.725412] Dumping ftrace buffer: [ 26.728948] (ftrace buffer empty) [ 26.732626] Kernel Offset: disabled [ 26.736230] Rebooting in 86400 seconds..