[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.515046] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.219791] random: sshd: uninitialized urandom read (32 bytes read) [ 18.564809] random: sshd: uninitialized urandom read (32 bytes read) [ 19.438441] random: sshd: uninitialized urandom read (32 bytes read) [ 19.572198] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. [ 25.068039] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/19 23:30:20 parsed 1 programs [ 26.481966] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/19 23:30:22 executed programs: 0 [ 27.356467] IPVS: Creating netns size=2536 id=1 [ 27.480010] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 27.492063] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 27.533772] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 27.544944] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 27.587078] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 27.598783] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 27.611104] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 27.631875] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 28.108315] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 28.133520] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 28.139840] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 28.146555] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.417438] ------------[ cut here ]------------ [ 28.422220] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 28.430709] Kernel panic - not syncing: panic_on_warn set ... [ 28.430709] [ 28.438057] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.109-ge1815b3 #3 [ 28.444957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.454289] ffff8801db307cc0 ffffffff81eb3e29 ffffffff83c48960 00000000ffffffff [ 28.462295] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 28.470300] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 28.478315] Call Trace: [ 28.480875] [ 28.482919] [] dump_stack+0xc1/0x128 [ 28.488281] [] panic+0x1bf/0x3bc [ 28.493280] [] ? add_taint.cold.6+0x16/0x16 [ 28.499771] [] ? __warn.cold.9+0xa6/0x17f [ 28.505569] [] ? inet_sock_destruct+0x598/0x760 [ 28.511874] [] __warn.cold.9+0xc1/0x17f [ 28.517505] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 28.523984] [] warn_slowpath_null+0x2c/0x40 [ 28.529933] [] inet_sock_destruct+0x598/0x760 [ 28.536067] [] ? ipv4_mib_init_net+0x570/0x570 [ 28.542285] [] l2tp_tunnel_destruct+0x339/0x590 [ 28.548595] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 28.555077] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 28.561556] [] __sk_destruct+0x55/0x590 [ 28.567158] [] rcu_process_callbacks+0x8ae/0x12b0 [ 28.573628] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 28.580277] [] ? sock_set_timeout+0x210/0x210 [ 28.586406] [] __do_softirq+0x20b/0x937 [ 28.592006] [] irq_exit+0x147/0x190 [ 28.597264] [] smp_apic_timer_interrupt+0x81/0xa0 [ 28.603752] [] apic_timer_interrupt+0xa0/0xb0 [ 28.609870] [ 28.611914] [] ? native_safe_halt+0x6/0x10 [ 28.617804] [] ? trace_hardirqs_on+0xd/0x10 [ 28.623759] [] default_idle+0x55/0x360 [ 28.629290] [] arch_cpu_idle+0x10/0x20 [ 28.634811] [] default_idle_call+0x45/0x60 [ 28.640685] [] cpu_startup_entry+0x2b5/0x380 [ 28.646718] [] ? cpu_in_idle+0x20/0x20 [ 28.652241] [] start_secondary+0x328/0x400 [ 28.658107] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 28.665289] Dumping ftrace buffer: [ 28.668856] (ftrace buffer empty) [ 28.672545] Kernel Offset: disabled [ 28.676155] Rebooting in 86400 seconds..