[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.267895] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.396322] random: sshd: uninitialized urandom read (32 bytes read) [ 18.911881] random: sshd: uninitialized urandom read (32 bytes read) [ 19.899523] random: sshd: uninitialized urandom read (32 bytes read) [ 20.039849] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts. [ 25.424565] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/02 00:08:41 parsed 1 programs [ 27.271435] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/02 00:08:43 executed programs: 0 [ 28.685774] IPVS: Creating netns size=2536 id=1 [ 28.804389] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 28.816458] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 28.858499] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 28.870046] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 28.911728] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 28.922953] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 28.935233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 28.956938] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 29.432097] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 29.456524] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 29.462650] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 29.470205] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.763164] ------------[ cut here ]------------ [ 29.767956] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 29.776453] Kernel panic - not syncing: panic_on_warn set ... [ 29.776453] [ 29.783806] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.116-g0137ea2 #22 [ 29.790800] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.800131] ffff8801db207cc0 ffffffff81eb46a9 ffffffff83c48980 00000000ffffffff [ 29.808190] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 29.816191] ffffffff81421a75 0000000041b58ab3 ffffffff843bbff8 ffffffff814218b6 [ 29.824189] Call Trace: [ 29.826743] [ 29.828785] [] dump_stack+0xc1/0x128 [ 29.834154] [] panic+0x1bf/0x3bc [ 29.839158] [] ? add_taint.cold.6+0x16/0x16 [ 29.845107] [] ? __warn.cold.9+0xa6/0x17f [ 29.850890] [] ? inet_sock_destruct+0x598/0x760 [ 29.857187] [] __warn.cold.9+0xc1/0x17f [ 29.862788] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 29.869254] [] warn_slowpath_null+0x2c/0x40 [ 29.875198] [] inet_sock_destruct+0x598/0x760 [ 29.881326] [] ? ipv4_mib_init_net+0x570/0x570 [ 29.887535] [] l2tp_tunnel_destruct+0x339/0x590 [ 29.893839] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 29.900318] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 29.906795] [] __sk_destruct+0x55/0x590 [ 29.912407] [] rcu_process_callbacks+0x8ae/0x12b0 [ 29.918884] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 29.925531] [] ? sock_set_timeout+0x210/0x210 [ 29.931660] [] __do_softirq+0x20b/0x937 [ 29.937271] [] irq_exit+0x147/0x190 [ 29.942528] [] smp_apic_timer_interrupt+0x81/0xa0 [ 29.948992] [] apic_timer_interrupt+0xa0/0xb0 [ 29.955109] [ 29.957149] [] ? native_safe_halt+0x6/0x10 [ 29.963041] [] default_idle+0x55/0x360 [ 29.968554] [] arch_cpu_idle+0x10/0x20 [ 29.974063] [] default_idle_call+0x45/0x60 [ 29.979924] [] cpu_startup_entry+0x2b5/0x380 [ 29.985957] [] ? cpu_in_idle+0x20/0x20 [ 29.991471] [] rest_init+0x183/0x189 [ 29.996812] [] start_kernel+0x67e/0x6b2 [ 30.002416] [] ? thread_stack_cache_init+0xb/0xb [ 30.008815] [] ? x86_family+0x32/0x40 [ 30.014260] [] ? early_idt_handler_array+0x120/0x120 [ 30.020990] [] x86_64_start_reservations+0x29/0x2b [ 30.027548] [] x86_64_start_kernel+0x13f/0x162 [ 30.034290] Dumping ftrace buffer: [ 30.037877] (ftrace buffer empty) [ 30.041588] Kernel Offset: disabled [ 30.045272] Rebooting in 86400 seconds..