[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.798185] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.877846] random: sshd: uninitialized urandom read (32 bytes read) [ 17.420924] random: sshd: uninitialized urandom read (32 bytes read) [ 18.167410] random: sshd: uninitialized urandom read (32 bytes read) [ 18.306038] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.49' (ECDSA) to the list of known hosts. [ 23.807727] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 23.896598] ------------[ cut here ]------------ [ 23.901377] WARNING: CPU: 0 PID: 3800 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 23.909401] precision 1046907 too large[ 23.913168] Kernel panic - not syncing: panic_on_warn set ... [ 23.913168] [ 23.920518] CPU: 0 PID: 3800 Comm: syz-executor856 Not tainted 4.9.99-gc462abb #23 [ 23.928193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.937518] ffff8801b55676e0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 23.945488] 0000000000000000 0000000000000000 0000000000000795 ffff8801b55677a0 [ 23.953470] ffffffff8141f855 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f696 [ 23.961446] Call Trace: [ 23.964005] [] dump_stack+0xc1/0x128 [ 23.969341] [] panic+0x1bf/0x3bc [ 23.974328] [] ? add_taint.cold.6+0x16/0x16 [ 23.980268] [] ? __warn.cold.9+0xa6/0x17f [ 23.986036] [] ? set_precision+0x144/0x170 [ 23.991898] [] __warn.cold.9+0xc1/0x17f [ 23.997492] [] ? unwind_next_frame+0x86/0xe0 [ 24.003521] [] warn_slowpath_fmt+0xc2/0x100 [ 24.009471] [] ? __warn+0x50/0x50 [ 24.014549] [] ? format_decode+0x1b1/0x9e0 [ 24.020418] [] ? set_precision+0x170/0x170 [ 24.026274] [] set_precision+0x144/0x170 [ 24.031960] [] vsnprintf+0x31e/0x1840 [ 24.037389] [] ? pointer+0xb00/0xb00 [ 24.042733] [] vscnprintf+0x2d/0x60 [ 24.047984] [] vprintk_emit+0xf4/0x790 [ 24.053492] [] vprintk+0x28/0x30 [ 24.058480] [] vprintk_default+0x1d/0x30 [ 24.064168] [] printk+0xaf/0xd7 [ 24.069068] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 24.075879] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.082778] [] ? ___ratelimit+0x53/0x401 [ 24.088460] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 24.095357] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.102165] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.108974] [] key_create_or_update+0x35b/0xac0 [ 24.115266] [] ? key_type_lookup+0xd0/0xd0 [ 24.121120] [] ? lookup_user_key+0x10f/0xd10 [ 24.127154] [] ? lookup_user_key+0xa0b/0xd10 [ 24.133182] [] ? __check_object_size+0x248/0x38e [ 24.139561] [] SyS_add_key+0x1b4/0x390 [ 24.145067] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.152569] [] ? do_syscall_64+0x48/0x490 [ 24.158335] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.165838] [] do_syscall_64+0x1a6/0x490 [ 24.171521] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.179344] Dumping ftrace buffer: [ 24.182866] (ftrace buffer empty) [ 24.186551] Kernel Offset: disabled [ 24.190148] Rebooting in 86400 seconds..