[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.493694] 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: [ 21.587122] random: sshd: uninitialized urandom read (32 bytes read) [ 21.813596] random: sshd: uninitialized urandom read (32 bytes read) [ 22.646110] random: sshd: uninitialized urandom read (32 bytes read) [ 41.453620] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 46.992422] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/26 13:58:28 parsed 1 programs [ 48.552198] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/26 13:58:30 executed programs: 0 [ 49.623850] IPVS: Creating netns size=2536 id=1 [ 49.760693] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.773241] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.819676] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.831948] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.879952] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.891937] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.904244] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 49.918095] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 50.491386] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 50.519013] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 50.525356] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 50.532164] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 50.802781] ------------[ cut here ]------------ [ 50.807574] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 50.816088] Kernel panic - not syncing: panic_on_warn set ... [ 50.816088] [ 50.823437] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.110-g00a0bcb #7 [ 50.830337] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.839672] ffff8801db207cc0 ffffffff81eb2329 ffffffff83c48960 00000000ffffffff [ 50.847679] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 50.855674] ffffffff81421925 0000000041b58ab3 ffffffff843ba880 ffffffff81421766 [ 50.863662] Call Trace: [ 50.866220] [ 50.868263] [] dump_stack+0xc1/0x128 [ 50.873621] [] panic+0x1bf/0x3bc [ 50.878643] [] ? add_taint.cold.6+0x16/0x16 [ 50.884616] [] ? __warn.cold.9+0xa6/0x17f [ 50.890392] [] ? inet_sock_destruct+0x598/0x760 [ 50.896686] [] __warn.cold.9+0xc1/0x17f [ 50.902284] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 50.908756] [] warn_slowpath_null+0x2c/0x40 [ 50.914731] [] inet_sock_destruct+0x598/0x760 [ 50.920854] [] ? ipv4_mib_init_net+0x570/0x570 [ 50.927154] [] l2tp_tunnel_destruct+0x339/0x590 [ 50.933451] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 50.939921] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 50.946392] [] __sk_destruct+0x55/0x590 [ 50.952009] [] rcu_process_callbacks+0x8ae/0x12b0 [ 50.958483] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 50.965135] [] ? sock_set_timeout+0x210/0x210 [ 50.971259] [] __do_softirq+0x20b/0x937 [ 50.976864] [] irq_exit+0x147/0x190 [ 50.982128] [] smp_apic_timer_interrupt+0x81/0xa0 [ 50.988610] [] apic_timer_interrupt+0xa0/0xb0 [ 50.994728] [ 50.996774] [] ? native_safe_halt+0x6/0x10 [ 51.002657] [] default_idle+0x55/0x360 [ 51.008170] [] arch_cpu_idle+0x10/0x20 [ 51.013683] [] default_idle_call+0x45/0x60 [ 51.019549] [] cpu_startup_entry+0x2b5/0x380 [ 51.025584] [] ? cpu_in_idle+0x20/0x20 [ 51.031105] [] rest_init+0x183/0x189 [ 51.036449] [] start_kernel+0x67e/0x6b2 [ 51.042056] [] ? thread_stack_cache_init+0xb/0xb [ 51.048456] [] ? x86_family+0x32/0x40 [ 51.053900] [] ? early_idt_handler_array+0x120/0x120 [ 51.060630] [] x86_64_start_reservations+0x29/0x2b [ 51.067182] [] x86_64_start_kernel+0x13f/0x162 [ 51.073902] Dumping ftrace buffer: [ 51.077472] (ftrace buffer empty) [ 51.081156] Kernel Offset: disabled [ 51.084759] Rebooting in 86400 seconds..