[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.345944] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.540240] random: sshd: uninitialized urandom read (32 bytes read) [ 16.874940] random: sshd: uninitialized urandom read (32 bytes read) [ 17.731214] random: sshd: uninitialized urandom read (32 bytes read) [ 17.856465] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. [ 23.311606] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/06 10:21:50 parsed 1 programs [ 25.223629] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/06 10:21:53 executed programs: 0 [ 26.599370] IPVS: Creating netns size=2536 id=1 [ 26.731080] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 26.746491] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 26.791434] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 26.802916] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 26.846960] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 26.859190] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 26.871244] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 26.892939] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 27.412644] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 27.438066] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 27.444588] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 27.451304] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.703155] ------------[ cut here ]------------ [ 27.707967] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 27.716465] Kernel panic - not syncing: panic_on_warn set ... [ 27.716465] [ 27.723810] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.111-g03c70fe #10 [ 27.730959] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.740312] ffff8801db307cc0 ffffffff81eb2729 ffffffff83c48980 00000000ffffffff [ 27.748333] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 27.756514] ffffffff814219f5 0000000041b58ab3 ffffffff843ba8c0 ffffffff81421836 [ 27.764579] Call Trace: [ 27.767137] [ 27.769182] [] dump_stack+0xc1/0x128 [ 27.774561] [] panic+0x1bf/0x3bc [ 27.779657] [] ? add_taint.cold.6+0x16/0x16 [ 27.785615] [] ? __warn.cold.9+0xa6/0x17f [ 27.791402] [] ? inet_sock_destruct+0x598/0x760 [ 27.797723] [] __warn.cold.9+0xc1/0x17f [ 27.803349] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 27.809842] [] warn_slowpath_null+0x2c/0x40 [ 27.815813] [] inet_sock_destruct+0x598/0x760 [ 27.821936] [] ? ipv4_mib_init_net+0x570/0x570 [ 27.828156] [] l2tp_tunnel_destruct+0x339/0x590 [ 27.834557] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 27.841031] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 27.847543] [] __sk_destruct+0x55/0x590 [ 27.853155] [] rcu_process_callbacks+0x8ae/0x12b0 [ 27.859633] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 27.866284] [] ? sock_set_timeout+0x210/0x210 [ 27.872426] [] __do_softirq+0x20b/0x937 [ 27.878035] [] irq_exit+0x147/0x190 [ 27.883297] [] smp_apic_timer_interrupt+0x81/0xa0 [ 27.889763] [] apic_timer_interrupt+0xa0/0xb0 [ 27.895875] [ 27.897917] [] ? native_safe_halt+0x6/0x10 [ 27.903793] [] ? trace_hardirqs_on+0xd/0x10 [ 27.909750] [] default_idle+0x55/0x360 [ 27.915281] [] arch_cpu_idle+0x10/0x20 [ 27.920811] [] default_idle_call+0x45/0x60 [ 27.926688] [] cpu_startup_entry+0x2b5/0x380 [ 27.932730] [] ? cpu_in_idle+0x20/0x20 [ 27.938264] [] start_secondary+0x328/0x400 [ 27.944141] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 27.951286] Dumping ftrace buffer: [ 27.954856] (ftrace buffer empty) [ 27.958546] Kernel Offset: disabled [ 27.962160] Rebooting in 86400 seconds..