[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   15.608823] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.579893] random: sshd: uninitialized urandom read (32 bytes read)
[   19.822364] random: sshd: uninitialized urandom read (32 bytes read)
[   20.758704] random: sshd: uninitialized urandom read (32 bytes read)
[   20.896632] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts.
[   26.342054] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   26.427198] ------------[ cut here ]------------
[   26.431982] WARNING: CPU: 0 PID: 3799 at lib/vsprintf.c:1938 set_precision+0x144/0x170
[   26.440013] precision 1047814 too large[   26.443790] Kernel panic - not syncing: panic_on_warn set ...
[   26.443790] 
[   26.451143] CPU: 0 PID: 3799 Comm: syz-executor063 Not tainted 4.9.113-g47bbcd6 #14
[   26.458906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.468259]  ffff8801c65af6d0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff
[   26.476254]  0000000000000000 0000000000000000 0000000000000792 ffff8801c65af790
[   26.484240]  ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896
[   26.492245] Call Trace:
[   26.494809]  [<ffffffff81eb32a9>] dump_stack+0xc1/0x128
[   26.500245]  [<ffffffff81421a55>] panic+0x1bf/0x3bc
[   26.505248]  [<ffffffff81421896>] ? add_taint.cold.6+0x16/0x16
[   26.511210]  [<ffffffff81421d26>] ? __warn.cold.9+0xa6/0x17f
[   26.516995]  [<ffffffff81ed47f4>] ? set_precision+0x144/0x170
[   26.522855]  [<ffffffff81421d41>] __warn.cold.9+0xc1/0x17f
[   26.528470]  [<ffffffff810d2e76>] ? unwind_next_frame+0x86/0xe0
[   26.534519]  [<ffffffff811366e2>] warn_slowpath_fmt+0xc2/0x100
[   26.540465]  [<ffffffff81136620>] ? __warn+0x50/0x50
[   26.545543]  [<ffffffff81ed49d1>] ? format_decode+0x1b1/0x9e0
[   26.551402]  [<ffffffff81ed4820>] ? set_precision+0x170/0x170
[   26.557268]  [<ffffffff81ed47f4>] set_precision+0x144/0x170
[   26.562956]  [<ffffffff81ede70e>] vsnprintf+0x31e/0x1840
[   26.568382]  [<ffffffff81ede3f0>] ? pointer+0xb00/0xb00
[   26.573728]  [<ffffffff81edfc5d>] vscnprintf+0x2d/0x60
[   26.578984]  [<ffffffff8125f2d4>] vprintk_emit+0xf4/0x790
[   26.584507]  [<ffffffff8125f998>] vprintk+0x28/0x30
[   26.589506]  [<ffffffff8125f9bd>] vprintk_default+0x1d/0x30
[   26.595187]  [<ffffffff8142cbbc>] printk+0xaf/0xd7
[   26.600088]  [<ffffffff8142cb0d>] ? log_wakeup_reason.cold.1+0x13f/0x13f
[   26.606904]  [<ffffffff839f9685>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   26.613810]  [<ffffffff81ec40e3>] ? ___ratelimit+0x53/0x401
[   26.619584]  [<ffffffff839e220a>] dns_resolver_preparse.cold.3+0x71/0x240
[   26.626488]  [<ffffffff839c9e70>] ? dns_resolver_free_preparse+0x40/0x40
[   26.633310]  [<ffffffff839c9e70>] ? dns_resolver_free_preparse+0x40/0x40
[   26.640121]  [<ffffffff81cd1fdb>] key_create_or_update+0x35b/0xac0
[   26.646413]  [<ffffffff81cd1c80>] ? key_type_lookup+0xd0/0xd0
[   26.652273]  [<ffffffff81cdca7f>] ? lookup_user_key+0x10f/0xd10
[   26.658306]  [<ffffffff815621f8>] ? __check_object_size+0x248/0x38e
[   26.664702]  [<ffffffff81cd6e54>] SyS_add_key+0x1b4/0x390
[   26.670217]  [<ffffffff81cd6ca0>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   26.677737]  [<ffffffff81006b7f>] ? do_fast_syscall_32+0xcf/0x870
[   26.683946]  [<ffffffff81cd6ca0>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   26.691893]  [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870
[   26.698036]  [<ffffffff81003036>] ? trace_hardirqs_off_thunk+0x1a/0x1c
[   26.704675]  [<ffffffff839fb690>] entry_SYSENTER_compat+0x90/0xa2
[   26.711457] Dumping ftrace buffer:
[   26.714975]    (ftrace buffer empty)
[   26.718655] Kernel Offset: disabled
[   26.722253] Rebooting in 86400 seconds..