[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.570612] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   17.460543] random: sshd: uninitialized urandom read (32 bytes read)
[   17.942093] random: sshd: uninitialized urandom read (32 bytes read)
[   18.638777] random: sshd: uninitialized urandom read (32 bytes read)
[   26.847980] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts.
[   32.294475] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   32.384361] ------------[ cut here ]------------
[   32.389134] WARNING: CPU: 0 PID: 3800 at lib/vsprintf.c:1941 set_precision+0x144/0x170
[   32.397157] precision 1048570 too large[   32.400926] Kernel panic - not syncing: panic_on_warn set ...
[   32.400926] 
[   32.408278] CPU: 0 PID: 3800 Comm: syz-executor128 Not tainted 4.9.98-gf5a861c #16
[   32.415957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.425291]  ffff8801b6bd76e0 ffffffff81eb0fc9 ffffffff83c484a0 00000000ffffffff
[   32.433266]  0000000000000000 0000000000000000 0000000000000795 ffff8801b6bd77a0
[   32.441270]  ffffffff8141f975 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f7b6
[   32.449284] Call Trace:
[   32.451846]  [<ffffffff81eb0fc9>] dump_stack+0xc1/0x128
[   32.457189]  [<ffffffff8141f975>] panic+0x1bf/0x3bc
[   32.462176]  [<ffffffff8141f7b6>] ? add_taint.cold.6+0x16/0x16
[   32.468125]  [<ffffffff8141fc46>] ? __warn.cold.9+0xa6/0x17f
[   32.473893]  [<ffffffff81ed2514>] ? set_precision+0x144/0x170
[   32.479748]  [<ffffffff8141fc61>] __warn.cold.9+0xc1/0x17f
[   32.485344]  [<ffffffff810d0e16>] ? unwind_next_frame+0x86/0xe0
[   32.491375]  [<ffffffff811344b2>] warn_slowpath_fmt+0xc2/0x100
[   32.497316]  [<ffffffff811343f0>] ? __warn+0x50/0x50
[   32.502398]  [<ffffffff81ed26f1>] ? format_decode+0x1b1/0x9e0
[   32.508338]  [<ffffffff81ed2540>] ? set_precision+0x170/0x170
[   32.514193]  [<ffffffff81ed2514>] set_precision+0x144/0x170
[   32.519874]  [<ffffffff81edc42e>] vsnprintf+0x31e/0x1840
[   32.525297]  [<ffffffff81edc110>] ? pointer+0xb00/0xb00
[   32.530633]  [<ffffffff81edd97d>] vscnprintf+0x2d/0x60
[   32.535884]  [<ffffffff8125d484>] vprintk_emit+0xf4/0x790
[   32.541392]  [<ffffffff8125db48>] vprintk+0x28/0x30
[   32.546389]  [<ffffffff8125db6d>] vprintk_default+0x1d/0x30
[   32.552073]  [<ffffffff8142aab5>] printk+0xaf/0xd7
[   32.556974]  [<ffffffff8142aa06>] ? log_wakeup_reason.cold.1+0x13f/0x13f
[   32.563798]  [<ffffffff839f3d45>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   32.570707]  [<ffffffff81ec1e03>] ? ___ratelimit+0x53/0x401
[   32.576394]  [<ffffffff839dc8c9>] dns_resolver_preparse.cold.3+0x71/0x240
[   32.583303]  [<ffffffff839c4500>] ? dns_resolver_free_preparse+0x40/0x40
[   32.590983]  [<ffffffff839c4500>] ? dns_resolver_free_preparse+0x40/0x40
[   32.597794]  [<ffffffff81ccfd6b>] key_create_or_update+0x35b/0xac0
[   32.604084]  [<ffffffff81ccfa10>] ? key_type_lookup+0xd0/0xd0
[   32.609939]  [<ffffffff81cda80f>] ? lookup_user_key+0x10f/0xd10
[   32.615968]  [<ffffffff81cdb10b>] ? lookup_user_key+0xa0b/0xd10
[   32.621999]  [<ffffffff8155fa38>] ? __check_object_size+0x248/0x38e
[   32.628379]  [<ffffffff81cd4be4>] SyS_add_key+0x1b4/0x390
[   32.633886]  [<ffffffff81cd4a30>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   32.641392]  [<ffffffff810061b8>] ? do_syscall_64+0x48/0x490
[   32.647164]  [<ffffffff81cd4a30>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   32.654667]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   32.660348]  [<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   32.667612] Dumping ftrace buffer:
[   32.671123]    (ftrace buffer empty)
[   32.674802] Kernel Offset: disabled
[   32.678398] Rebooting in 86400 seconds..