[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.616637] 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: [ 20.060039] random: sshd: uninitialized urandom read (32 bytes read) [ 20.583656] random: sshd: uninitialized urandom read (32 bytes read) [ 21.448476] random: sshd: uninitialized urandom read (32 bytes read) [ 41.473536] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. [ 46.948941] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/27 17:41:20 parsed 1 programs [ 48.971750] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/27 17:41:22 executed programs: 0 [ 50.102646] IPVS: Creating netns size=2536 id=1 [ 50.247276] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 50.259118] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 50.304205] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 50.315846] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 50.360244] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 50.372299] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 50.384579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 50.398055] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 50.958620] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 50.984646] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 50.990991] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 50.998502] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 51.271605] ------------[ cut here ]------------ [ 51.276409] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 51.285159] Kernel panic - not syncing: panic_on_warn set ... [ 51.285159] [ 51.292519] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.110-g00a0bcb #7 [ 51.299436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.308879] ffff8801db207cc0 ffffffff81eb2329 ffffffff83c48960 00000000ffffffff [ 51.316917] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 51.324921] ffffffff81421925 0000000041b58ab3 ffffffff843ba880 ffffffff81421766 [ 51.332921] Call Trace: [ 51.335489] [ 51.337533] [] dump_stack+0xc1/0x128 [ 51.342901] [] panic+0x1bf/0x3bc [ 51.347907] [] ? add_taint.cold.6+0x16/0x16 [ 51.353859] [] ? __warn.cold.9+0xa6/0x17f [ 51.359656] [] ? inet_sock_destruct+0x598/0x760 [ 51.365968] [] __warn.cold.9+0xc1/0x17f [ 51.371585] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 51.378084] [] warn_slowpath_null+0x2c/0x40 [ 51.384044] [] inet_sock_destruct+0x598/0x760 [ 51.390181] [] ? ipv4_mib_init_net+0x570/0x570 [ 51.396398] [] l2tp_tunnel_destruct+0x339/0x590 [ 51.402694] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 51.409162] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 51.415638] [] __sk_destruct+0x55/0x590 [ 51.421245] [] rcu_process_callbacks+0x8ae/0x12b0 [ 51.427717] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 51.434362] [] ? sock_set_timeout+0x210/0x210 [ 51.440505] [] __do_softirq+0x20b/0x937 [ 51.446111] [] irq_exit+0x147/0x190 [ 51.451375] [] smp_apic_timer_interrupt+0x81/0xa0 [ 51.457858] [] apic_timer_interrupt+0xa0/0xb0 [ 51.463975] [ 51.466020] [] ? native_safe_halt+0x6/0x10 [ 51.471901] [] default_idle+0x55/0x360 [ 51.477418] [] arch_cpu_idle+0x10/0x20 [ 51.482930] [] default_idle_call+0x45/0x60 [ 51.488796] [] cpu_startup_entry+0x2b5/0x380 [ 51.494839] [] ? cpu_in_idle+0x20/0x20 [ 51.500352] [] rest_init+0x183/0x189 [ 51.505692] [] start_kernel+0x67e/0x6b2 [ 51.511306] [] ? thread_stack_cache_init+0xb/0xb [ 51.517722] [] ? x86_family+0x32/0x40 [ 51.523311] [] ? early_idt_handler_array+0x120/0x120 [ 51.530052] [] x86_64_start_reservations+0x29/0x2b [ 51.536638] [] x86_64_start_kernel+0x13f/0x162 [ 51.543395] Dumping ftrace buffer: [ 51.546977] (ftrace buffer empty) [ 51.550665] Kernel Offset: disabled [ 51.554282] Rebooting in 86400 seconds..