[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.917817] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.534234] random: sshd: uninitialized urandom read (32 bytes read) [ 17.854533] random: sshd: uninitialized urandom read (32 bytes read) [ 18.669023] random: sshd: uninitialized urandom read (32 bytes read) [ 18.804726] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.48' (ECDSA) to the list of known hosts. [ 24.419996] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.507672] IPVS: Creating netns size=2536 id=1 executing program executing program [ 24.622823] ------------[ cut here ]------------ [ 24.627651] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 24.636143] Kernel panic - not syncing: panic_on_warn set ... [ 24.636143] [ 24.643495] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.110-g00a0bcb #4 [ 24.650492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.659857] ffff8801db307cc0 ffffffff81eb2329 ffffffff83c48960 00000000ffffffff [ 24.667898] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 24.675991] ffffffff81421925 0000000041b58ab3 ffffffff843ba880 ffffffff81421766 [ 24.684008] Call Trace: [ 24.686567] [ 24.688617] [] dump_stack+0xc1/0x128 [ 24.693998] [] panic+0x1bf/0x3bc [ 24.699002] [] ? add_taint.cold.6+0x16/0x16 [ 24.704960] [] ? __warn.cold.9+0xa6/0x17f [ 24.710747] [] ? inet_sock_destruct+0x598/0x760 [ 24.717044] [] __warn.cold.9+0xc1/0x17f [ 24.722658] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 24.729128] [] warn_slowpath_null+0x2c/0x40 [ 24.735178] [] inet_sock_destruct+0x598/0x760 [ 24.741320] [] ? ipv4_mib_init_net+0x570/0x570 [ 24.747554] [] l2tp_tunnel_destruct+0x339/0x590 [ 24.753867] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 24.760341] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 24.766818] [] __sk_destruct+0x55/0x590 [ 24.772422] [] rcu_process_callbacks+0x8ae/0x12b0 [ 24.778902] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 24.785556] [] ? sock_set_timeout+0x210/0x210 [ 24.791688] [] __do_softirq+0x20b/0x937 [ 24.797301] [] irq_exit+0x147/0x190 [ 24.802553] [] smp_apic_timer_interrupt+0x81/0xa0 [ 24.809046] [] apic_timer_interrupt+0xa0/0xb0 [ 24.815166] [ 24.817208] [] ? native_safe_halt+0x6/0x10 [ 24.823104] [] ? trace_hardirqs_on+0xd/0x10 [ 24.829051] [] default_idle+0x55/0x360 [ 24.834562] [] arch_cpu_idle+0x10/0x20 [ 24.840075] [] default_idle_call+0x45/0x60 [ 24.846477] [] cpu_startup_entry+0x2b5/0x380 [ 24.852521] [] ? cpu_in_idle+0x20/0x20 [ 24.858060] [] start_secondary+0x328/0x400 [ 24.863924] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 24.871199] Dumping ftrace buffer: [ 24.874782] (ftrace buffer empty) [ 24.878468] Kernel Offset: disabled [ 24.882090] Rebooting in 86400 seconds..