[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.365897] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.024937] random: sshd: uninitialized urandom read (32 bytes read) [ 18.522875] random: sshd: uninitialized urandom read (32 bytes read) [ 19.313895] random: sshd: uninitialized urandom read (32 bytes read) [ 19.450166] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. [ 24.861334] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.941186] ------------[ cut here ]------------ [ 24.945967] WARNING: CPU: 0 PID: 3796 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 24.953990] precision 1048368 too large[ 24.957760] Kernel panic - not syncing: panic_on_warn set ... [ 24.957760] [ 24.965414] CPU: 0 PID: 3796 Comm: syz-executor334 Not tainted 4.9.99-gc462abb #23 [ 24.973092] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.982422] ffff8801d9bff6e0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 24.990425] 0000000000000000 0000000000000000 0000000000000795 ffff8801d9bff7a0 [ 24.998424] ffffffff8141f855 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f696 [ 25.006413] Call Trace: [ 25.008972] [] dump_stack+0xc1/0x128 [ 25.014316] [] panic+0x1bf/0x3bc [ 25.019310] [] ? add_taint.cold.6+0x16/0x16 [ 25.025254] [] ? __warn.cold.9+0xa6/0x17f [ 25.031026] [] ? set_precision+0x144/0x170 [ 25.036886] [] __warn.cold.9+0xc1/0x17f [ 25.042492] [] ? unwind_next_frame+0x86/0xe0 [ 25.048526] [] warn_slowpath_fmt+0xc2/0x100 [ 25.054475] [] ? __warn+0x50/0x50 [ 25.059563] [] ? format_decode+0x1b1/0x9e0 [ 25.065424] [] ? set_precision+0x170/0x170 [ 25.071282] [] set_precision+0x144/0x170 [ 25.076970] [] vsnprintf+0x31e/0x1840 [ 25.082400] [] ? pointer+0xb00/0xb00 [ 25.087738] [] vscnprintf+0x2d/0x60 [ 25.092990] [] vprintk_emit+0xf4/0x790 [ 25.098508] [] vprintk+0x28/0x30 [ 25.103497] [] vprintk_default+0x1d/0x30 [ 25.109180] [] printk+0xaf/0xd7 [ 25.114080] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 25.120907] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 25.127809] [] ? ___ratelimit+0x53/0x401 [ 25.133495] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 25.140398] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.147220] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.154038] [] key_create_or_update+0x35b/0xac0 [ 25.160330] [] ? key_type_lookup+0xd0/0xd0 [ 25.166199] [] ? lookup_user_key+0x10f/0xd10 [ 25.172229] [] ? lookup_user_key+0xa0b/0xd10 [ 25.178258] [] ? __check_object_size+0x248/0x38e [ 25.184636] [] SyS_add_key+0x1b4/0x390 [ 25.190148] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.197828] [] ? do_syscall_64+0x48/0x490 [ 25.203600] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.211108] [] do_syscall_64+0x1a6/0x490 [ 25.216793] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 25.224147] Dumping ftrace buffer: [ 25.227658] (ftrace buffer empty) [ 25.231343] Kernel Offset: disabled [ 25.234941] Rebooting in 86400 seconds..