[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.352537] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.394839] random: sshd: uninitialized urandom read (32 bytes read)
[   16.894725] random: sshd: uninitialized urandom read (32 bytes read)
[   17.639332] random: sshd: uninitialized urandom read (32 bytes read)
[   28.709670] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts.
[   34.084387] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   34.164508] ------------[ cut here ]------------
[   34.169295] WARNING: CPU: 1 PID: 3810 at lib/vsprintf.c:1941 set_precision+0x144/0x170
[   34.177319] precision 1048025 too large[   34.181090] Kernel panic - not syncing: panic_on_warn set ...
[   34.181090] 
[   34.188446] CPU: 1 PID: 3810 Comm: syz-executor916 Not tainted 4.9.97-g1321d42 #16
[   34.196148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.205476]  ffff8801c9d876e0 ffffffff81eb0b69 ffffffff83c484a0 00000000ffffffff
[   34.213482]  0000000000000000 0000000000000001 0000000000000795 ffff8801c9d877a0
[   34.221571]  ffffffff8141f975 0000000041b58ab3 ffffffff843b8408 ffffffff8141f7b6
[   34.229552] Call Trace:
[   34.232115]  [<ffffffff81eb0b69>] dump_stack+0xc1/0x128
[   34.237450]  [<ffffffff8141f975>] panic+0x1bf/0x3bc
[   34.242450]  [<ffffffff8141f7b6>] ? add_taint.cold.6+0x16/0x16
[   34.248393]  [<ffffffff8141fc46>] ? __warn.cold.9+0xa6/0x17f
[   34.254174]  [<ffffffff81ed20e4>] ? set_precision+0x144/0x170
[   34.260029]  [<ffffffff8141fc61>] __warn.cold.9+0xc1/0x17f
[   34.265625]  [<ffffffff810d0e16>] ? unwind_next_frame+0x86/0xe0
[   34.271655]  [<ffffffff811344b2>] warn_slowpath_fmt+0xc2/0x100
[   34.277602]  [<ffffffff811343f0>] ? __warn+0x50/0x50
[   34.282678]  [<ffffffff81ed22c1>] ? format_decode+0x1b1/0x9e0
[   34.288534]  [<ffffffff81ed2110>] ? set_precision+0x170/0x170
[   34.294391]  [<ffffffff81ed20e4>] set_precision+0x144/0x170
[   34.300072]  [<ffffffff81edbffe>] vsnprintf+0x31e/0x1840
[   34.305494]  [<ffffffff81edbce0>] ? pointer+0xb00/0xb00
[   34.310829]  [<ffffffff81edd54d>] vscnprintf+0x2d/0x60
[   34.316079]  [<ffffffff8125d484>] vprintk_emit+0xf4/0x790
[   34.321588]  [<ffffffff8125db48>] vprintk+0x28/0x30
[   34.326576]  [<ffffffff8125db6d>] vprintk_default+0x1d/0x30
[   34.332262]  [<ffffffff8142aab5>] printk+0xaf/0xd7
[   34.337164]  [<ffffffff8142aa06>] ? log_wakeup_reason.cold.1+0x13f/0x13f
[   34.343975]  [<ffffffff839f3d45>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   34.350872]  [<ffffffff81ec19d3>] ? ___ratelimit+0x53/0x401
[   34.356555]  [<ffffffff839dc8c9>] dns_resolver_preparse.cold.3+0x71/0x240
[   34.363453]  [<ffffffff839c4500>] ? dns_resolver_free_preparse+0x40/0x40
[   34.370262]  [<ffffffff839c4500>] ? dns_resolver_free_preparse+0x40/0x40
[   34.377073]  [<ffffffff81ccf9fb>] key_create_or_update+0x35b/0xac0
[   34.383363]  [<ffffffff81ccf6a0>] ? key_type_lookup+0xd0/0xd0
[   34.389219]  [<ffffffff81cda49f>] ? lookup_user_key+0x10f/0xd10
[   34.395249]  [<ffffffff81cdad9b>] ? lookup_user_key+0xa0b/0xd10
[   34.401279]  [<ffffffff8155fa38>] ? __check_object_size+0x248/0x38e
[   34.407656]  [<ffffffff81cd4874>] SyS_add_key+0x1b4/0x390
[   34.413531]  [<ffffffff81cd46c0>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   34.421046]  [<ffffffff810061b8>] ? do_syscall_64+0x48/0x490
[   34.426820]  [<ffffffff81cd46c0>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   34.434325]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   34.440009]  [<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   34.447296] Dumping ftrace buffer:
[   34.450807]    (ftrace buffer empty)
[   34.454487] Kernel Offset: disabled
[   34.458087] Rebooting in 86400 seconds..