[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.788909] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.266095] random: sshd: uninitialized urandom read (32 bytes read) [ 25.733763] random: sshd: uninitialized urandom read (32 bytes read) [ 26.105495] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. [ 31.603137] urandom_read: 1 callbacks suppressed [ 31.603140] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/05 13:13:41 parsed 1 programs [ 33.012860] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/05 13:13:43 executed programs: 0 [ 33.859398] IPVS: Creating netns size=2536 id=1 [ 33.978590] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.989793] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.030600] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.041743] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.083862] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.096130] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.107721] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.120003] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.593872] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 34.618533] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 34.625027] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 34.632330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.901560] ------------[ cut here ]------------ [ 34.906335] WARNING: CPU: 1 PID: 2359 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 34.915077] Kernel panic - not syncing: panic_on_warn set ... [ 34.915077] [ 34.922419] CPU: 1 PID: 2359 Comm: udevd Not tainted 4.9.117-g8b21e85 #23 [ 34.929315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.938640] ffff8801db307cc0 ffffffff81eb4be9 ffffffff83c48980 00000000ffffffff [ 34.946663] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 34.954642] ffffffff81421c85 0000000041b58ab3 ffffffff843bc020 ffffffff81421ac6 [ 34.962621] Call Trace: [ 34.965172] [ 34.967211] [] dump_stack+0xc1/0x128 [ 34.972574] [] panic+0x1bf/0x3bc [ 34.977563] [] ? add_taint.cold.6+0x16/0x16 [ 34.983522] [] ? __warn.cold.9+0xa6/0x17f [ 34.989312] [] ? inet_sock_destruct+0x598/0x760 [ 34.995598] [] __warn.cold.9+0xc1/0x17f [ 35.001197] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 35.007663] [] warn_slowpath_null+0x2c/0x40 [ 35.013607] [] inet_sock_destruct+0x598/0x760 [ 35.019733] [] ? ipv4_mib_init_net+0x570/0x570 [ 35.025934] [] l2tp_tunnel_destruct+0x339/0x590 [ 35.032224] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 35.038683] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 35.045147] [] __sk_destruct+0x55/0x590 [ 35.050742] [] rcu_process_callbacks+0x8ae/0x12b0 [ 35.057202] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 35.063836] [] ? sock_set_timeout+0x210/0x210 [ 35.069956] [] __do_softirq+0x20b/0x937 [ 35.075550] [] irq_exit+0x147/0x190 [ 35.080801] [] smp_apic_timer_interrupt+0x81/0xa0 [ 35.087265] [] apic_timer_interrupt+0xa0/0xb0 [ 35.093376] [ 35.095416] [] ? _raw_spin_unlock_irqrestore+0x5f/0x70 [ 35.102349] [] __wake_up_sync_key+0x4b/0x60 [ 35.108292] [] sock_def_readable+0x100/0x400 [ 35.114320] [] ? sk_send_sigurg+0x280/0x280 [ 35.120265] [] unix_dgram_sendmsg+0xb82/0x10e0 [ 35.126472] [] ? check_preemption_disabled+0x3b/0x170 [ 35.133291] [] ? unix_stream_connect+0x1130/0x1130 [ 35.139845] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.146655] [] ? check_preemption_disabled+0x3b/0x170 [ 35.153473] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 35.159955] [] ? security_socket_sendmsg+0x8f/0xc0 [ 35.166511] [] ? unix_stream_connect+0x1130/0x1130 [ 35.173072] [] sock_sendmsg+0xcc/0x110 [ 35.178580] [] SYSC_sendto+0x21c/0x370 [ 35.184087] [] ? SYSC_connect+0x300/0x300 [ 35.189862] [] ? __fget_light+0x169/0x1f0 [ 35.195639] [] ? __fdget+0x18/0x20 [ 35.200800] [] ? sockfd_lookup_light+0xb6/0x160 [ 35.207099] [] ? check_preemption_disabled+0x3b/0x170 [ 35.213907] [] SyS_sendto+0x40/0x50 [ 35.219154] [] ? SyS_getpeername+0x30/0x30 [ 35.225025] [] do_syscall_64+0x1a6/0x490 [ 35.230711] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 35.238067] Dumping ftrace buffer: [ 35.241608] (ftrace buffer empty) [ 35.245297] Kernel Offset: disabled [ 35.248907] Rebooting in 86400 seconds..