[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.219903] 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: [ 22.133853] random: sshd: uninitialized urandom read (32 bytes read) [ 22.543983] random: sshd: uninitialized urandom read (32 bytes read) [ 23.228257] random: sshd: uninitialized urandom read (32 bytes read) [ 24.317461] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.20' (ECDSA) to the list of known hosts. [ 29.672205] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/04 22:57:55 parsed 1 programs [ 31.662631] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/04 22:57:57 executed programs: 0 [ 32.883565] IPVS: Creating netns size=2536 id=1 [ 33.018619] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.030898] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.078464] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 33.090414] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 33.136842] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 33.149645] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 33.162436] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 33.176566] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 33.720799] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 33.746639] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 33.753291] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 33.761341] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.057700] ------------[ cut here ]------------ [ 34.062540] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 34.071195] Kernel panic - not syncing: panic_on_warn set ... [ 34.071195] [ 34.078552] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.111-g03c70fe #9 [ 34.085546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.094902] ffff8801db207cc0 ffffffff81eb2729 ffffffff83c48980 00000000ffffffff [ 34.103006] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 34.111040] ffffffff814219f5 0000000041b58ab3 ffffffff843ba8c0 ffffffff81421836 [ 34.119053] Call Trace: [ 34.121617] [ 34.123661] [] dump_stack+0xc1/0x128 [ 34.129017] [] panic+0x1bf/0x3bc [ 34.134034] [] ? add_taint.cold.6+0x16/0x16 [ 34.139982] [] ? __warn.cold.9+0xa6/0x17f [ 34.145769] [] ? inet_sock_destruct+0x598/0x760 [ 34.152075] [] __warn.cold.9+0xc1/0x17f [ 34.157679] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 34.164178] [] warn_slowpath_null+0x2c/0x40 [ 34.170130] [] inet_sock_destruct+0x598/0x760 [ 34.176255] [] ? ipv4_mib_init_net+0x570/0x570 [ 34.182476] [] l2tp_tunnel_destruct+0x339/0x590 [ 34.188775] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 34.195251] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 34.201729] [] __sk_destruct+0x55/0x590 [ 34.207345] [] rcu_process_callbacks+0x8ae/0x12b0 [ 34.213812] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 34.220458] [] ? sock_set_timeout+0x210/0x210 [ 34.226594] [] __do_softirq+0x20b/0x937 [ 34.232198] [] irq_exit+0x147/0x190 [ 34.237461] [] smp_apic_timer_interrupt+0x81/0xa0 [ 34.243941] [] apic_timer_interrupt+0xa0/0xb0 [ 34.250069] [ 34.252111] [] ? native_safe_halt+0x6/0x10 [ 34.258022] [] default_idle+0x55/0x360 [ 34.263541] [] arch_cpu_idle+0x10/0x20 [ 34.269102] [] default_idle_call+0x45/0x60 [ 34.275167] [] cpu_startup_entry+0x2b5/0x380 [ 34.281205] [] ? cpu_in_idle+0x20/0x20 [ 34.286833] [] rest_init+0x183/0x189 [ 34.292284] [] start_kernel+0x67e/0x6b2 [ 34.297894] [] ? thread_stack_cache_init+0xb/0xb [ 34.304291] [] ? x86_family+0x32/0x40 [ 34.309737] [] ? early_idt_handler_array+0x120/0x120 [ 34.316489] [] x86_64_start_reservations+0x29/0x2b [ 34.323054] [] x86_64_start_kernel+0x13f/0x162 [ 34.330151] Dumping ftrace buffer: [ 34.334113] (ftrace buffer empty) [ 34.337807] Kernel Offset: disabled [ 34.341428] Rebooting in 86400 seconds..