[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.596345] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 14.855050] random: sshd: uninitialized urandom read (32 bytes read) [ 15.213982] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.026939] random: sshd: uninitialized urandom read (32 bytes read) [ 16.155617] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts. [ 21.552518] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 21.637285] ------------[ cut here ]------------ [ 21.642078] WARNING: CPU: 0 PID: 3793 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 21.650117] precision 1048368 too large[ 21.653885] Kernel panic - not syncing: panic_on_warn set ... [ 21.653885] [ 21.661237] CPU: 0 PID: 3793 Comm: syz-executor602 Not tainted 4.9.99-gc462abb #20 [ 21.668914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.678329] ffff8801b67d76e0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 21.686311] 0000000000000000 0000000000000000 0000000000000795 ffff8801b67d77a0 [ 21.694289] ffffffff8141f855 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f696 [ 21.702269] Call Trace: [ 21.704841] [] dump_stack+0xc1/0x128 [ 21.710181] [] panic+0x1bf/0x3bc [ 21.715170] [] ? add_taint.cold.6+0x16/0x16 [ 21.721111] [] ? __warn.cold.9+0xa6/0x17f [ 21.726880] [] ? set_precision+0x144/0x170 [ 21.732739] [] __warn.cold.9+0xc1/0x17f [ 21.738337] [] ? unwind_next_frame+0x86/0xe0 [ 21.744369] [] warn_slowpath_fmt+0xc2/0x100 [ 21.750312] [] ? __warn+0x50/0x50 [ 21.755387] [] ? format_decode+0x1b1/0x9e0 [ 21.761242] [] ? set_precision+0x170/0x170 [ 21.767099] [] set_precision+0x144/0x170 [ 21.772781] [] vsnprintf+0x31e/0x1840 [ 21.778201] [] ? pointer+0xb00/0xb00 [ 21.783534] [] vscnprintf+0x2d/0x60 [ 21.788783] [] vprintk_emit+0xf4/0x790 [ 21.794293] [] vprintk+0x28/0x30 [ 21.799289] [] vprintk_default+0x1d/0x30 [ 21.804978] [] printk+0xaf/0xd7 [ 21.809886] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 21.816706] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 21.823610] [] ? ___ratelimit+0x53/0x401 [ 21.829299] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 21.836197] [] ? dns_resolver_free_preparse+0x40/0x40 [ 21.843004] [] ? dns_resolver_free_preparse+0x40/0x40 [ 21.849816] [] key_create_or_update+0x35b/0xac0 [ 21.856126] [] ? key_type_lookup+0xd0/0xd0 [ 21.861990] [] ? lookup_user_key+0x10f/0xd10 [ 21.868018] [] ? lookup_user_key+0xa0b/0xd10 [ 21.874049] [] ? __check_object_size+0x248/0x38e [ 21.880427] [] SyS_add_key+0x1b4/0x390 [ 21.885943] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 21.893457] [] ? do_syscall_64+0x48/0x490 [ 21.899234] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 21.906743] [] do_syscall_64+0x1a6/0x490 [ 21.912427] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 21.919907] Dumping ftrace buffer: [ 21.923427] (ftrace buffer empty) [ 21.927109] Kernel Offset: disabled [ 21.930706] Rebooting in 86400 seconds..