[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.000136] 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: [ 19.565502] random: sshd: uninitialized urandom read (32 bytes read) [ 19.911200] random: sshd: uninitialized urandom read (32 bytes read) [ 20.672081] random: sshd: uninitialized urandom read (32 bytes read) [ 20.809929] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.58' (ECDSA) to the list of known hosts. [ 26.269480] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/29 14:19:05 parsed 1 programs 2018/04/29 14:19:05 executed programs: 0 [ 26.682991] IPVS: Creating netns size=2536 id=1 [ 26.744064] ------------[ cut here ]------------ [ 26.748864] WARNING: CPU: 1 PID: 3829 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 26.757621] Kernel panic - not syncing: panic_on_warn set ... [ 26.757621] [ 26.764976] CPU: 1 PID: 3829 Comm: blkid Not tainted 4.9.96-g71fce1e #13 [ 26.771805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.781152] ffff8801db307cc0 ffffffff81eb0b69 ffffffff83a484a0 00000000ffffffff [ 26.789191] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 26.797240] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 26.805270] Call Trace: [ 26.807841] [ 26.809896] [] dump_stack+0xc1/0x128 [ 26.815275] [] panic+0x1bf/0x3bc [ 26.820283] [] ? add_taint.cold.6+0x16/0x16 [ 26.826254] [] ? __warn.cold.9+0xa6/0x17f [ 26.832041] [] ? inet_sock_destruct+0x598/0x760 [ 26.838341] [] __warn.cold.9+0xc1/0x17f [ 26.843952] [] warn_slowpath_null+0x2c/0x40 [ 26.849920] [] inet_sock_destruct+0x598/0x760 [ 26.856070] [] ? ipv4_mib_init_net+0x570/0x570 [ 26.862305] [] l2tp_tunnel_destruct+0x339/0x590 [ 26.868626] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 26.875127] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 26.881630] [] __sk_destruct+0x55/0x590 [ 26.887259] [] rcu_process_callbacks+0x8ae/0x12b0 [ 26.893748] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 26.900409] [] ? sock_set_timeout+0x210/0x210 [ 26.906551] [] __do_softirq+0x20b/0x937 [ 26.912173] [] ? qlist_free_all+0x2e/0xc0 [ 26.917975] [] irq_exit+0x147/0x190 [ 26.923243] [] smp_apic_timer_interrupt+0x81/0xa0 [ 26.929722] [] apic_timer_interrupt+0xa0/0xb0 [ 26.935851] [ 26.937911] [] ? qlist_free_all+0x2e/0xc0 [ 26.943726] [] ? qlist_free_all+0x81/0xc0 [ 26.949523] [] ? ptlock_alloc+0x20/0x80 [ 26.955137] [] quarantine_reduce+0x188/0x1d0 [ 26.961179] [] ? quarantine_reduce+0x92/0x1d0 [ 26.967312] [] kasan_kmalloc+0x9b/0xe0 [ 26.972840] [] ? ptlock_alloc+0x20/0x80 [ 26.978461] [] kasan_slab_alloc+0x12/0x20 [ 26.984253] [] kmem_cache_alloc+0xbe/0x290 [ 26.990133] [] ptlock_alloc+0x20/0x80 [ 26.995579] [] pte_alloc_one+0x62/0x100 [ 27.001199] [] handle_mm_fault+0x22a3/0x28e0 [ 27.007257] [] ? vm_insert_mixed+0x200/0x200 [ 27.013313] [] ? __lock_is_held+0xa2/0xf0 [ 27.019102] [] __do_page_fault+0x5af/0xd50 [ 27.024978] [] ? mm_fault_error+0x2c0/0x2c0 [ 27.030942] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.037612] [] do_page_fault+0x27/0x30 [ 27.043144] [] page_fault+0x28/0x30 [ 27.049006] Dumping ftrace buffer: [ 27.052581] (ftrace buffer empty) [ 27.056263] Kernel Offset: disabled [ 27.059871] Rebooting in 86400 seconds..