[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.958554] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.678229] random: sshd: uninitialized urandom read (32 bytes read) [ 19.075151] random: sshd: uninitialized urandom read (32 bytes read) [ 20.010442] random: sshd: uninitialized urandom read (32 bytes read) [ 20.130607] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 25.589959] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/13 18:39:33 parsed 1 programs [ 27.187095] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/13 18:39:35 executed programs: 0 [ 28.275412] IPVS: Creating netns size=2536 id=1 [ 28.467707] ------------[ cut here ]------------ [ 28.472591] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 28.481103] Kernel panic - not syncing: panic_on_warn set ... [ 28.481103] [ 28.488459] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.112-g9e79039 #11 [ 28.495458] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.504797] ffff8801db307cc0 ffffffff81eb3249 ffffffff83c48980 00000000ffffffff [ 28.512830] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 28.520883] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 28.528889] Call Trace: [ 28.531445] [ 28.533503] [] dump_stack+0xc1/0x128 [ 28.538968] [] panic+0x1bf/0x3bc [ 28.543972] [] ? add_taint.cold.6+0x16/0x16 [ 28.549934] [] ? __warn.cold.9+0xa6/0x17f [ 28.555734] [] ? inet_sock_destruct+0x598/0x760 [ 28.562035] [] __warn.cold.9+0xc1/0x17f [ 28.567646] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 28.574121] [] warn_slowpath_null+0x2c/0x40 [ 28.580070] [] inet_sock_destruct+0x598/0x760 [ 28.586190] [] ? ipv4_mib_init_net+0x570/0x570 [ 28.592493] [] l2tp_tunnel_destruct+0x339/0x590 [ 28.598788] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 28.606054] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 28.612524] [] __sk_destruct+0x55/0x590 [ 28.618135] [] rcu_process_callbacks+0x8ae/0x12b0 [ 28.624600] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 28.631242] [] ? sock_set_timeout+0x210/0x210 [ 28.637360] [] __do_softirq+0x20b/0x937 [ 28.642960] [] irq_exit+0x147/0x190 [ 28.648211] [] smp_apic_timer_interrupt+0x81/0xa0 [ 28.654688] [] apic_timer_interrupt+0xa0/0xb0 [ 28.660802] [ 28.662840] [] ? native_safe_halt+0x6/0x10 [ 28.668724] [] ? trace_hardirqs_on+0xd/0x10 [ 28.674670] [] default_idle+0x55/0x360 [ 28.680186] [] arch_cpu_idle+0x10/0x20 [ 28.685698] [] default_idle_call+0x45/0x60 [ 28.691566] [] cpu_startup_entry+0x2b5/0x380 [ 28.697615] [] ? cpu_in_idle+0x20/0x20 [ 28.703147] [] start_secondary+0x328/0x400 [ 28.709106] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 28.716544] Dumping ftrace buffer: [ 28.720161] (ftrace buffer empty) [ 28.723845] Kernel Offset: disabled [ 28.727461] Rebooting in 86400 seconds..