[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   15.699044] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   17.210479] random: sshd: uninitialized urandom read (32 bytes read)
[   17.670677] random: sshd: uninitialized urandom read (32 bytes read)
[   18.443510] random: sshd: uninitialized urandom read (32 bytes read)
[   18.585517] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts.
[   24.010949] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   24.213427] ------------[ cut here ]------------
[   24.218223] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   24.226709] Kernel panic - not syncing: panic_on_warn set ...
[   24.226709] 
[   24.234059] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.102-g2e35bed #36
[   24.241052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   24.250390]  ffff8801db307cc0 ffffffff81eb3489 ffffffff83c48b40 00000000ffffffff
[   24.258407]  0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80
[   24.266406]  ffffffff81421aa5 0000000041b58ab3 ffffffff843b94b0 ffffffff814218e6
[   24.274406] Call Trace:
[   24.276964]  <IRQ> [   24.279003]  [<ffffffff81eb3489>] dump_stack+0xc1/0x128
[   24.284365]  [<ffffffff81421aa5>] panic+0x1bf/0x3bc
[   24.289361]  [<ffffffff814218e6>] ? add_taint.cold.6+0x16/0x16
[   24.295322]  [<ffffffff81421d76>] ? __warn.cold.9+0xa6/0x17f
[   24.301099]  [<ffffffff83423048>] ? inet_sock_destruct+0x598/0x760
[   24.307411]  [<ffffffff81421d91>] __warn.cold.9+0xc1/0x17f
[   24.313015]  [<ffffffff836bb16f>] ? l2tp_tunnel_closeall+0x2af/0x350
[   24.319487]  [<ffffffff8113665c>] warn_slowpath_null+0x2c/0x40
[   24.325438]  [<ffffffff83423048>] inet_sock_destruct+0x598/0x760
[   24.331565]  [<ffffffff83422ab0>] ? ipv4_mib_init_net+0x570/0x570
[   24.337791]  [<ffffffff836bb9b9>] l2tp_tunnel_destruct+0x339/0x590
[   24.344093]  [<ffffffff836bb82a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   24.350574]  [<ffffffff836bb680>] ? l2tp_tunnel_del_work+0x470/0x470
[   24.357046]  [<ffffffff83020095>] __sk_destruct+0x55/0x590
[   24.362667]  [<ffffffff812878de>] rcu_process_callbacks+0x8ae/0x12b0
[   24.369148]  [<ffffffff812879be>] ? rcu_process_callbacks+0x98e/0x12b0
[   24.375793]  [<ffffffff83020040>] ? sock_set_timeout+0x210/0x210
[   24.381927]  [<ffffffff839fe4bb>] __do_softirq+0x20b/0x937
[   24.387547]  [<ffffffff8114b0b7>] irq_exit+0x147/0x190
[   24.392804]  [<ffffffff839fd0a1>] smp_apic_timer_interrupt+0x81/0xa0
[   24.399276]  [<ffffffff839f9230>] apic_timer_interrupt+0xa0/0xb0
[   24.405404]  <EOI> [   24.407463]  [<ffffffff839f64f6>] ? native_safe_halt+0x6/0x10
[   24.413360]  [<ffffffff81235f6d>] ? trace_hardirqs_on+0xd/0x10
[   24.419320]  [<ffffffff839f5b35>] default_idle+0x55/0x360
[   24.424834]  [<ffffffff8106ab20>] arch_cpu_idle+0x10/0x20
[   24.430351]  [<ffffffff839f6955>] default_idle_call+0x45/0x60
[   24.436210]  [<ffffffff81222fb5>] cpu_startup_entry+0x2b5/0x380
[   24.442242]  [<ffffffff81222d00>] ? cpu_in_idle+0x20/0x20
[   24.447756]  [<ffffffff810ae9e8>] start_secondary+0x328/0x400
[   24.453620]  [<ffffffff810ae6c0>] ? set_cpu_sibling_map+0x1300/0x1300
[   24.460722] Dumping ftrace buffer:
[   24.464301]    (ftrace buffer empty)
[   24.467988] Kernel Offset: disabled
[   24.471603] Rebooting in 86400 seconds..