[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.204842] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 14.317838] random: sshd: uninitialized urandom read (32 bytes read) [ 14.567316] random: sshd: uninitialized urandom read (32 bytes read) [ 15.303128] random: sshd: uninitialized urandom read (32 bytes read) [ 25.849731] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 31.241136] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.327456] ------------[ cut here ]------------ [ 31.332292] WARNING: CPU: 1 PID: 3730 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 31.340349] precision 1048025 too large[ 31.344126] Kernel panic - not syncing: panic_on_warn set ... [ 31.344126] [ 31.351489] CPU: 1 PID: 3730 Comm: syz-executor692 Not tainted 4.9.97-g1321d42 #13 [ 31.359169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.368503] ffff8801be7876e0 ffffffff81eb0b69 ffffffff83c484a0 00000000ffffffff [ 31.376503] 0000000000000000 0000000000000001 0000000000000795 ffff8801be7877a0 [ 31.384514] ffffffff8141f975 0000000041b58ab3 ffffffff843b8408 ffffffff8141f7b6 [ 31.392499] Call Trace: [ 31.395069] [] dump_stack+0xc1/0x128 [ 31.400416] [] panic+0x1bf/0x3bc [ 31.405510] [] ? add_taint.cold.6+0x16/0x16 [ 31.411458] [] ? __warn.cold.9+0xa6/0x17f [ 31.417241] [] ? set_precision+0x144/0x170 [ 31.423104] [] __warn.cold.9+0xc1/0x17f [ 31.428808] [] ? unwind_next_frame+0x86/0xe0 [ 31.434855] [] warn_slowpath_fmt+0xc2/0x100 [ 31.440810] [] ? __warn+0x50/0x50 [ 31.445902] [] ? format_decode+0x1b1/0x9e0 [ 31.451777] [] ? set_precision+0x170/0x170 [ 31.457662] [] set_precision+0x144/0x170 [ 31.463362] [] vsnprintf+0x31e/0x1840 [ 31.468797] [] ? pointer+0xb00/0xb00 [ 31.474424] [] vscnprintf+0x2d/0x60 [ 31.479698] [] vprintk_emit+0xf4/0x790 [ 31.485213] [] vprintk+0x28/0x30 [ 31.490201] [] vprintk_default+0x1d/0x30 [ 31.495886] [] printk+0xaf/0xd7 [ 31.500790] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 31.507607] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 31.514513] [] ? ___ratelimit+0x53/0x401 [ 31.520214] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 31.527130] [] ? dns_resolver_free_preparse+0x40/0x40 [ 31.533948] [] ? dns_resolver_free_preparse+0x40/0x40 [ 31.540855] [] key_create_or_update+0x35b/0xac0 [ 31.547169] [] ? key_type_lookup+0xd0/0xd0 [ 31.553042] [] ? lookup_user_key+0x10f/0xd10 [ 31.559082] [] ? lookup_user_key+0xa0b/0xd10 [ 31.565119] [] ? __check_object_size+0x248/0x38e [ 31.571502] [] SyS_add_key+0x1b4/0x390 [ 31.577017] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 31.584546] [] ? do_syscall_64+0x48/0x490 [ 31.590321] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 31.597832] [] do_syscall_64+0x1a6/0x490 [ 31.603517] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 31.610898] Dumping ftrace buffer: [ 31.614424] (ftrace buffer empty) [ 31.618109] Kernel Offset: disabled [ 31.621715] Rebooting in 86400 seconds..