[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.553270] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 14.362602] random: sshd: uninitialized urandom read (32 bytes read) [ 14.651446] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.640276] random: sshd: uninitialized urandom read (32 bytes read) [ 15.763052] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. [ 21.194065] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/20 07:36:20 parsed 1 programs [ 23.017550] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/20 07:36:23 executed programs: 0 [ 24.093499] IPVS: Creating netns size=2536 id=1 [ 24.295356] ------------[ cut here ]------------ [ 24.300174] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 24.308676] Kernel panic - not syncing: panic_on_warn set ... [ 24.308676] [ 24.316037] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.113-g47bbcd6 #14 [ 24.323026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.332360] ffff8801db307cc0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 24.340349] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 24.349119] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 24.357124] Call Trace: [ 24.359708] [ 24.361761] [] dump_stack+0xc1/0x128 [ 24.367133] [] panic+0x1bf/0x3bc [ 24.372141] [] ? add_taint.cold.6+0x16/0x16 [ 24.378118] [] ? __warn.cold.9+0xa6/0x17f [ 24.383912] [] ? inet_sock_destruct+0x598/0x760 [ 24.390222] [] __warn.cold.9+0xc1/0x17f [ 24.395825] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 24.402296] [] warn_slowpath_null+0x2c/0x40 [ 24.408245] [] inet_sock_destruct+0x598/0x760 [ 24.414376] [] ? ipv4_mib_init_net+0x570/0x570 [ 24.420592] [] l2tp_tunnel_destruct+0x339/0x590 [ 24.426897] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 24.433380] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 24.439851] [] __sk_destruct+0x55/0x590 [ 24.445460] [] rcu_process_callbacks+0x8ae/0x12b0 [ 24.451939] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 24.458585] [] ? sock_set_timeout+0x210/0x210 [ 24.464719] [] __do_softirq+0x20b/0x937 [ 24.470321] [] irq_exit+0x147/0x190 [ 24.475582] [] smp_apic_timer_interrupt+0x81/0xa0 [ 24.482048] [] apic_timer_interrupt+0xa0/0xb0 [ 24.488162] [ 24.490205] [] ? native_safe_halt+0x6/0x10 [ 24.496087] [] ? trace_hardirqs_on+0xd/0x10 [ 24.502043] [] default_idle+0x55/0x360 [ 24.507563] [] arch_cpu_idle+0x10/0x20 [ 24.513084] [] default_idle_call+0x45/0x60 [ 24.518951] [] cpu_startup_entry+0x2b5/0x380 [ 24.524988] [] ? cpu_in_idle+0x20/0x20 [ 24.530510] [] start_secondary+0x328/0x400 [ 24.536369] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 24.543524] Dumping ftrace buffer: [ 24.547101] (ftrace buffer empty) [ 24.550784] Kernel Offset: disabled [ 24.554394] Rebooting in 86400 seconds..