[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.010037] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.184956] random: sshd: uninitialized urandom read (32 bytes read)
[   20.799160] random: sshd: uninitialized urandom read (32 bytes read)
[   21.891562] random: sshd: uninitialized urandom read (32 bytes read)
[   26.732566] random: crng init done
Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts.
executing program
[   32.259235] ------------[ cut here ]------------
[   32.264033] WARNING: CPU: 1 PID: 3796 at lib/vsprintf.c:1941 set_precision+0x144/0x170
[   32.272070] precision 59591 too large[   32.275679] Kernel panic - not syncing: panic_on_warn set ...
[   32.275679] 
[   32.283047] CPU: 1 PID: 3796 Comm: syz-executor315 Not tainted 4.9.107-gdb2c520 #46
[   32.290822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.300172]  ffff8801d8c9f6e0 ffffffff81eb3da9 ffffffff83c48b40 00000000ffffffff
[   32.308199]  0000000000000000 0000000000000001 0000000000000795 ffff8801d8c9f7a0
[   32.316193]  ffffffff81421925 0000000041b58ab3 ffffffff843b9b48 ffffffff81421766
[   32.324189] Call Trace:
[   32.326758]  [<ffffffff81eb3da9>] dump_stack+0xc1/0x128
[   32.332099]  [<ffffffff81421925>] panic+0x1bf/0x3bc
[   32.337096]  [<ffffffff81421766>] ? add_taint.cold.6+0x16/0x16
[   32.343040]  [<ffffffff81421bf6>] ? __warn.cold.9+0xa6/0x17f
[   32.348832]  [<ffffffff81ed52f4>] ? set_precision+0x144/0x170
[   32.354718]  [<ffffffff81421c11>] __warn.cold.9+0xc1/0x17f
[   32.360340]  [<ffffffff810d2e16>] ? unwind_next_frame+0x86/0xe0
[   32.366384]  [<ffffffff81136662>] warn_slowpath_fmt+0xc2/0x100
[   32.372349]  [<ffffffff811365a0>] ? __warn+0x50/0x50
[   32.377461]  [<ffffffff81ed54d1>] ? format_decode+0x1b1/0x9e0
[   32.383356]  [<ffffffff81ed5320>] ? set_precision+0x170/0x170
[   32.389233]  [<ffffffff81ed52f4>] set_precision+0x144/0x170
[   32.394941]  [<ffffffff81edf20e>] vsnprintf+0x31e/0x1840
[   32.400368]  [<ffffffff81edeef0>] ? pointer+0xb00/0xb00
[   32.405724]  [<ffffffff81ee075d>] vscnprintf+0x2d/0x60
[   32.410999]  [<ffffffff8125f264>] vprintk_emit+0xf4/0x790
[   32.416537]  [<ffffffff8125f928>] vprintk+0x28/0x30
[   32.421575]  [<ffffffff8125f94d>] vprintk_default+0x1d/0x30
[   32.427297]  [<ffffffff8142ca8c>] printk+0xaf/0xd7
[   32.432210]  [<ffffffff8142c9dd>] ? log_wakeup_reason.cold.1+0x13f/0x13f
[   32.439039]  [<ffffffff839f9205>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   32.445957]  [<ffffffff81ec4be3>] ? ___ratelimit+0x53/0x401
[   32.451652]  [<ffffffff839e1d8e>] dns_resolver_preparse.cold.3+0x71/0x240
[   32.458560]  [<ffffffff839c99b0>] ? dns_resolver_free_preparse+0x40/0x40
[   32.465371]  [<ffffffff839c99b0>] ? dns_resolver_free_preparse+0x40/0x40
[   32.472194]  [<ffffffff81cd2b3b>] key_create_or_update+0x35b/0xac0
[   32.478496]  [<ffffffff81cd27e0>] ? key_type_lookup+0xd0/0xd0
[   32.484354]  [<ffffffff81cdd5df>] ? lookup_user_key+0x10f/0xd10
[   32.490387]  [<ffffffff81562018>] ? __check_object_size+0x248/0x38e
[   32.496775]  [<ffffffff81cd79b4>] SyS_add_key+0x1b4/0x390
[   32.502304]  [<ffffffff81cd7800>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   32.509815]  [<ffffffff810061b8>] ? do_syscall_64+0x48/0x490
[   32.515594]  [<ffffffff81cd7800>] ? key_get_type_from_user.constprop.9+0xe0/0xe0
[   32.523111]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   32.528796]  [<ffffffff839f9b13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   32.536363] Dumping ftrace buffer:
[   32.539886]    (ftrace buffer empty)
[   32.543574] Kernel Offset: disabled
[   32.547194] Rebooting in 86400 seconds..