[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.317437] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.998966] random: sshd: uninitialized urandom read (32 bytes read) [ 18.252869] random: sshd: uninitialized urandom read (32 bytes read) [ 19.156164] random: sshd: uninitialized urandom read (32 bytes read) [ 19.287173] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.41' (ECDSA) to the list of known hosts. [ 24.675289] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.750533] ------------[ cut here ]------------ [ 24.755312] WARNING: CPU: 1 PID: 3800 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 24.763336] precision 59591 too large[ 24.766929] Kernel panic - not syncing: panic_on_warn set ... [ 24.766929] [ 24.774278] CPU: 1 PID: 3800 Comm: syz-executor490 Not tainted 4.9.107-g42a730a #48 [ 24.782040] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.791366] ffff8801d91276e0 ffffffff81eb42a9 ffffffff83c48b40 00000000ffffffff [ 24.799349] 0000000000000000 0000000000000001 0000000000000795 ffff8801d91277a0 [ 24.807321] ffffffff81421e65 0000000041b58ab3 ffffffff843b9b50 ffffffff81421ca6 [ 24.815439] Call Trace: [ 24.818000] [] dump_stack+0xc1/0x128 [ 24.823336] [] panic+0x1bf/0x3bc [ 24.828329] [] ? add_taint.cold.6+0x16/0x16 [ 24.834278] [] ? __warn.cold.9+0xa6/0x17f [ 24.840047] [] ? set_precision+0x144/0x170 [ 24.845900] [] __warn.cold.9+0xc1/0x17f [ 24.851497] [] ? unwind_next_frame+0x86/0xe0 [ 24.857538] [] warn_slowpath_fmt+0xc2/0x100 [ 24.863479] [] ? __warn+0x50/0x50 [ 24.868553] [] ? format_decode+0x1b1/0x9e0 [ 24.874409] [] ? set_precision+0x170/0x170 [ 24.880264] [] set_precision+0x144/0x170 [ 24.885944] [] vsnprintf+0x31e/0x1840 [ 24.891365] [] ? pointer+0xb00/0xb00 [ 24.896698] [] vscnprintf+0x2d/0x60 [ 24.901956] [] vprintk_emit+0xf4/0x790 [ 24.907462] [] vprintk+0x28/0x30 [ 24.912449] [] vprintk_default+0x1d/0x30 [ 24.918129] [] printk+0xaf/0xd7 [ 24.923028] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 24.929848] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.936745] [] ? ___ratelimit+0x53/0x401 [ 24.942427] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 24.949322] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.956129] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.962955] [] key_create_or_update+0x35b/0xac0 [ 24.969245] [] ? key_type_lookup+0xd0/0xd0 [ 24.975101] [] ? lookup_user_key+0x10f/0xd10 [ 24.981131] [] ? __check_object_size+0x248/0x38e [ 24.987509] [] SyS_add_key+0x1b4/0x390 [ 24.993017] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.000521] [] ? do_syscall_64+0x48/0x490 [ 25.006290] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.013798] [] do_syscall_64+0x1a6/0x490 [ 25.019481] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 25.026859] Dumping ftrace buffer: [ 25.030368] (ftrace buffer empty) [ 25.034049] Kernel Offset: disabled [ 25.037647] Rebooting in 86400 seconds..