[....] Starting OpenBSD Secure Shell server: sshd[   19.305098] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   23.381148] random: sshd: uninitialized urandom read (32 bytes read)
[   23.753829] random: sshd: uninitialized urandom read (32 bytes read)
[   24.452899] random: sshd: uninitialized urandom read (32 bytes read)
[   24.596307] sshd (4500) used greatest stack depth: 16920 bytes left
[   24.616238] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts.
[   30.103204] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   30.197878] IPVS: ftp: loaded support on port[0] = 21
executing program
executing program
[   36.309763] WARNING: CPU: 0 PID: 4525 at kernel/signal.c:351 task_participate_group_stop+0x205/0x260
[   36.319105] Kernel panic - not syncing: panic_on_warn set ...
[   36.319105] 
[   36.326457] CPU: 0 PID: 4525 Comm: 3 Not tainted 4.17.0-rc2+ #22
[   36.332580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.341918] Call Trace:
[   36.344494]  dump_stack+0x1b9/0x294
[   36.348114]  ? dump_stack_print_info.cold.2+0x52/0x52
[   36.353305]  ? task_participate_group_stop+0x190/0x260
[   36.358567]  panic+0x22f/0x4de
[   36.361740]  ? add_taint.cold.5+0x16/0x16
[   36.365875]  ? __warn.cold.8+0x148/0x1b3
[   36.369922]  ? __warn.cold.8+0x117/0x1b3
[   36.373968]  ? task_participate_group_stop+0x205/0x260
[   36.379226]  __warn.cold.8+0x163/0x1b3
[   36.383093]  ? task_participate_group_stop+0x205/0x260
[   36.388353]  report_bug+0x252/0x2d0
[   36.391963]  do_error_trap+0x1de/0x490
[   36.395848]  ? math_error+0x420/0x420
[   36.399646]  ? trace_hardirqs_off+0xd/0x10
[   36.403862]  ? _raw_spin_unlock_irqrestore+0x63/0xc0
[   36.408945]  ? depot_save_stack+0x26b/0x450
[   36.413250]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   36.418085]  do_invalid_op+0x1b/0x20
[   36.421779]  invalid_op+0x14/0x20
[   36.425223] RIP: 0010:task_participate_group_stop+0x205/0x260
[   36.431081] RSP: 0018:ffff8801af9df880 EFLAGS: 00010093
[   36.436424] RAX: ffff8801d93e8280 RBX: 0000000000000000 RCX: ffffffff81498b5b
[   36.443676] RDX: 0000000000000000 RSI: ffffffff81498c75 RDI: 0000000000000005
[   36.450929] RBP: ffff8801af9df8a0 R08: ffff8801d93e8280 R09: ffffed0039b94761
[   36.458180] R10: ffffed0039b94761 R11: ffff8801cdca3b0b R12: ffff8801ac6ec698
[   36.465428] R13: ffff8801ac6ec600 R14: 0000000000040000 R15: dffffc0000000000
[   36.472779]  ? task_participate_group_stop+0xeb/0x260
[   36.477951]  ? task_participate_group_stop+0x205/0x260
[   36.483209]  ? do_signal_stop+0x7a5/0xa20
[   36.487344]  do_signal_stop+0x502/0xa20
[   36.491301]  ? lock_release+0xa10/0xa10
[   36.495254]  ? ptrace_do_notify+0x330/0x330
[   36.499553]  ? check_same_owner+0x320/0x320
[   36.503863]  ? kasan_check_read+0x11/0x20
[   36.507994]  ? rcu_is_watching+0x85/0x140
[   36.512126]  ? kasan_check_write+0x14/0x20
[   36.516341]  ? do_raw_spin_lock+0xc1/0x200
[   36.520558]  get_signal+0x9b4/0x1960
[   36.524260]  ? put_files_struct+0x94/0x390
[   36.528476]  ? ptrace_notify+0x130/0x130
[   36.532521]  ? get_files_struct+0x80/0x80
[   36.536737]  ? rcu_read_lock_sched_held+0x108/0x120
[   36.541736]  ? kmem_cache_free+0x25c/0x2d0
[   36.545956]  ? do_execveat_common.isra.34+0x39c/0x2590
[   36.551215]  ? kmem_cache_alloc+0x12e/0x760
[   36.555555]  do_signal+0x98/0x2040
[   36.559095]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   36.564267]  ? __sanitizer_cov_trace_cmp8+0x18/0x20
[   36.569266]  ? __check_object_size+0x95/0x5d9
[   36.573744]  ? setup_sigcontext+0x7d0/0x7d0
[   36.578069]  ? usercopy_warn+0x120/0x120
[   36.582114]  ? kasan_check_read+0x11/0x20
[   36.586248]  ? do_raw_spin_unlock+0x9e/0x2e0
[   36.590643]  ? kasan_check_read+0x11/0x20
[   36.594777]  ? rcu_pm_notify+0xc0/0xc0
[   36.598660]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   36.604189]  ? strncpy_from_user+0x3b6/0x500
[   36.608604]  ? exit_to_usermode_loop+0x87/0x310
[   36.613257]  exit_to_usermode_loop+0x28a/0x310
[   36.617830]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   36.622669]  ? __x64_sys_execveat+0xeb/0x130
[   36.627067]  do_syscall_64+0x6ac/0x800
[   36.630940]  ? syscall_return_slowpath+0x5c0/0x5c0
[   36.635850]  ? syscall_return_slowpath+0x30f/0x5c0
[   36.640761]  ? retint_user+0x18/0x18
[   36.644458]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   36.649282]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   36.654452] RIP: 0033:0x127
[   36.657368] RSP: 002b:00007ffc19928370 EFLAGS: 00000200 ORIG_RAX: 000000000000003b
[   36.665058] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   36.672304] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   36.679551] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   36.686808] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   36.694059] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   36.701834] Dumping ftrace buffer:
[   36.705445]    (ftrace buffer empty)
[   36.709133] Kernel Offset: disabled
[   36.712742] Rebooting in 86400 seconds..