[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.941828] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 12.890692] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 13.211478] random: sshd: uninitialized urandom read (32 bytes read) [ 13.726575] random: sshd: uninitialized urandom read (32 bytes read) [ 13.867918] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. [ 19.218494] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/04 15:57:26 parsed 1 programs [ 20.805334] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/04 15:57:28 executed programs: 0 [ 21.822655] IPVS: Creating netns size=2536 id=1 [ 21.944343] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 21.955832] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 21.997927] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 22.009388] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 22.051899] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 22.063369] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 22.075670] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 22.091962] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 22.567964] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 22.592126] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 22.598242] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 22.605809] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 22.908706] ------------[ cut here ]------------ [ 22.913519] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 22.921997] Kernel panic - not syncing: panic_on_warn set ... [ 22.921997] [ 22.929337] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.117-g8b21e85 #23 [ 22.936321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.945650] ffff8801db207cc0 ffffffff81eb4be9 ffffffff83c48980 00000000ffffffff [ 22.953641] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 22.961678] ffffffff81421c85 0000000041b58ab3 ffffffff843bc020 ffffffff81421ac6 [ 22.969686] Call Trace: [ 22.972244] [ 22.974288] [] dump_stack+0xc1/0x128 [ 22.979646] [] panic+0x1bf/0x3bc [ 22.984639] [] ? add_taint.cold.6+0x16/0x16 [ 22.990583] [] ? __warn.cold.9+0xa6/0x17f [ 22.996359] [] ? inet_sock_destruct+0x598/0x760 [ 23.002651] [] __warn.cold.9+0xc1/0x17f [ 23.008686] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 23.015153] [] warn_slowpath_null+0x2c/0x40 [ 23.021102] [] inet_sock_destruct+0x598/0x760 [ 23.027229] [] ? ipv4_mib_init_net+0x570/0x570 [ 23.033436] [] l2tp_tunnel_destruct+0x339/0x590 [ 23.039727] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 23.046192] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 23.052835] [] __sk_destruct+0x55/0x590 [ 23.058440] [] rcu_process_callbacks+0x8ae/0x12b0 [ 23.064912] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 23.071580] [] ? sock_set_timeout+0x210/0x210 [ 23.077703] [] __do_softirq+0x20b/0x937 [ 23.083301] [] irq_exit+0x147/0x190 [ 23.088553] [] smp_apic_timer_interrupt+0x81/0xa0 [ 23.095023] [] apic_timer_interrupt+0xa0/0xb0 [ 23.101140] [ 23.103190] [] ? native_safe_halt+0x6/0x10 [ 23.109082] [] default_idle+0x55/0x360 [ 23.114624] [] arch_cpu_idle+0x10/0x20 [ 23.120180] [] default_idle_call+0x45/0x60 [ 23.126052] [] cpu_startup_entry+0x2b5/0x380 [ 23.132091] [] ? cpu_in_idle+0x20/0x20 [ 23.137606] [] rest_init+0x183/0x189 [ 23.142952] [] start_kernel+0x67e/0x6b2 [ 23.148553] [] ? thread_stack_cache_init+0xb/0xb [ 23.154947] [] ? x86_family+0x32/0x40 [ 23.160375] [] ? early_idt_handler_array+0x120/0x120 [ 23.167120] [] x86_64_start_reservations+0x29/0x2b [ 23.173677] [] x86_64_start_kernel+0x13f/0x162 [ 23.180298] Dumping ftrace buffer: [ 23.183840] (ftrace buffer empty) [ 23.187526] Kernel Offset: disabled [ 23.191137] Rebooting in 86400 seconds..