[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.570315] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.572600] random: sshd: uninitialized urandom read (32 bytes read)
[   22.878884] random: sshd: uninitialized urandom read (32 bytes read)
[   23.662263] random: sshd: uninitialized urandom read (32 bytes read)
[   23.818124] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts.
[   29.247861] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   29.353262] ------------[ cut here ]------------
[   29.358092] ODEBUG: assert_init not available (active state 0) object type: timer_list hint:           (null)
[   29.368273] WARNING: CPU: 0 PID: 4480 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210
[   29.377000] Kernel panic - not syncing: panic_on_warn set ...
[   29.377000] 
[   29.384355] CPU: 0 PID: 4480 Comm: syz-executor678 Not tainted 4.17.0-rc4+ #46
[   29.391690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.401029] Call Trace:
[   29.403980]  dump_stack+0x1b9/0x294
[   29.407597]  ? dump_stack_print_info.cold.2+0x52/0x52
[   29.412769]  ? debug_print_object+0x70/0x210
[   29.417155]  panic+0x22f/0x4de
[   29.420325]  ? add_taint.cold.5+0x16/0x16
[   29.424453]  ? __warn.cold.8+0x148/0x1b3
[   29.428490]  ? __warn.cold.8+0x117/0x1b3
[   29.432530]  ? debug_print_object+0x16a/0x210
[   29.437003]  __warn.cold.8+0x163/0x1b3
[   29.440878]  ? debug_print_object+0x16a/0x210
[   29.445351]  report_bug+0x252/0x2d0
[   29.448960]  do_error_trap+0x1de/0x490
[   29.452826]  ? math_error+0x420/0x420
[   29.456607]  ? vprintk_default+0x28/0x30
[   29.460651]  ? vprintk_func+0x81/0xe7
[   29.464430]  ? printk+0x9e/0xba
[   29.467693]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.472515]  do_invalid_op+0x1b/0x20
[   29.476219]  invalid_op+0x14/0x20
[   29.479658] RIP: 0010:debug_print_object+0x16a/0x210
[   29.484733] RSP: 0018:ffff8801c5d4f880 EFLAGS: 00010086
[   29.490076] RAX: 0000000000000061 RBX: 0000000000000005 RCX: ffffffff818431c8
[   29.497324] RDX: 0000000000000000 RSI: ffffffff8160f6f1 RDI: 0000000000000001
[   29.504570] RBP: ffff8801c5d4f8c0 R08: ffff8801b01be180 R09: ffffed003b5c3eb2
[   29.511816] R10: ffffed003b5c3eb2 R11: ffff8801dae1f597 R12: 0000000000000001
[   29.519064] R13: ffffffff88d96980 R14: ffffffff87fa19a0 R15: ffffffff81666ec0
[   29.526317]  ? __internal_add_timer+0x2d0/0x2d0
[   29.530969]  ? irq_work_queue+0x28/0x130
[   29.535014]  ? vprintk_func+0x81/0xe7
[   29.538806]  debug_object_assert_init+0x309/0x500
[   29.543628]  ? do_raw_spin_unlock+0x9e/0x2e0
[   29.548034]  ? debug_object_init_on_stack+0x20/0x20
[   29.553047]  ? __local_bh_enable_ip+0x161/0x230
[   29.557703]  ? _raw_spin_unlock_bh+0x30/0x40
[   29.562093]  del_timer+0x74/0x140
[   29.565524]  ? detach_if_pending+0x6e0/0x6e0
[   29.569912]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   29.575084]  try_to_grab_pending+0x439/0x9a0
[   29.579473]  ? work_busy+0x340/0x340
[   29.583166]  ? graph_lock+0x170/0x170
[   29.586943]  ? print_usage_bug+0xc0/0xc0
[   29.590981]  ? find_held_lock+0x36/0x1c0
[   29.595034]  ? lock_acquire+0x1dc/0x520
[   29.598992]  ? smc_setsockopt+0x22b/0x6d0
[   29.603125]  ? mark_held_locks+0xc9/0x160
[   29.607254]  mod_delayed_work_on+0x91/0x250
[   29.611554]  ? try_to_grab_pending+0x9a0/0x9a0
[   29.616117]  ? __local_bh_enable_ip+0x161/0x230
[   29.620767]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   29.625944]  smc_setsockopt+0x387/0x6d0
[   29.629905]  __sys_setsockopt+0x1bd/0x390
[   29.634050]  ? kernel_accept+0x310/0x310
[   29.638094]  ? mm_fault_error+0x380/0x380
[   29.642224]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   29.647744]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   29.652575]  __x64_sys_setsockopt+0xbe/0x150
[   29.656963]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   29.661957]  do_syscall_64+0x1b1/0x800
[   29.665823]  ? syscall_return_slowpath+0x5c0/0x5c0
[   29.670729]  ? syscall_return_slowpath+0x30f/0x5c0
[   29.675644]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   29.681162]  ? retint_user+0x18/0x18
[   29.684857]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.689683]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.694851] RIP: 0033:0x43fcf9
[   29.698075] RSP: 002b:00007fffe7c3be38 EFLAGS: 00000286 ORIG_RAX: 0000000000000036
[   29.705763] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9
[   29.713012] RDX: 0000000000000001 RSI: 0000000000000006 RDI: 0000000000000003
[   29.720267] RBP: 00000000006ca018 R08: 0000000000000004 R09: 00000000004002c8
[   29.727517] R10: 0000000020000000 R11: 0000000000000286 R12: 0000000000401620
[   29.734769] R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000
[   29.742698] Dumping ftrace buffer:
[   29.746341]    (ftrace buffer empty)
[   29.750032] Kernel Offset: disabled
[   29.753651] Rebooting in 86400 seconds..