[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.352537] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.394839] random: sshd: uninitialized urandom read (32 bytes read) [ 16.894725] random: sshd: uninitialized urandom read (32 bytes read) [ 17.639332] random: sshd: uninitialized urandom read (32 bytes read) [ 28.709670] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 34.084387] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.164508] ------------[ cut here ]------------ [ 34.169295] WARNING: CPU: 1 PID: 3810 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 34.177319] precision 1048025 too large[ 34.181090] Kernel panic - not syncing: panic_on_warn set ... [ 34.181090] [ 34.188446] CPU: 1 PID: 3810 Comm: syz-executor916 Not tainted 4.9.97-g1321d42 #16 [ 34.196148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.205476] ffff8801c9d876e0 ffffffff81eb0b69 ffffffff83c484a0 00000000ffffffff [ 34.213482] 0000000000000000 0000000000000001 0000000000000795 ffff8801c9d877a0 [ 34.221571] ffffffff8141f975 0000000041b58ab3 ffffffff843b8408 ffffffff8141f7b6 [ 34.229552] Call Trace: [ 34.232115] [] dump_stack+0xc1/0x128 [ 34.237450] [] panic+0x1bf/0x3bc [ 34.242450] [] ? add_taint.cold.6+0x16/0x16 [ 34.248393] [] ? __warn.cold.9+0xa6/0x17f [ 34.254174] [] ? set_precision+0x144/0x170 [ 34.260029] [] __warn.cold.9+0xc1/0x17f [ 34.265625] [] ? unwind_next_frame+0x86/0xe0 [ 34.271655] [] warn_slowpath_fmt+0xc2/0x100 [ 34.277602] [] ? __warn+0x50/0x50 [ 34.282678] [] ? format_decode+0x1b1/0x9e0 [ 34.288534] [] ? set_precision+0x170/0x170 [ 34.294391] [] set_precision+0x144/0x170 [ 34.300072] [] vsnprintf+0x31e/0x1840 [ 34.305494] [] ? pointer+0xb00/0xb00 [ 34.310829] [] vscnprintf+0x2d/0x60 [ 34.316079] [] vprintk_emit+0xf4/0x790 [ 34.321588] [] vprintk+0x28/0x30 [ 34.326576] [] vprintk_default+0x1d/0x30 [ 34.332262] [] printk+0xaf/0xd7 [ 34.337164] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 34.343975] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 34.350872] [] ? ___ratelimit+0x53/0x401 [ 34.356555] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 34.363453] [] ? dns_resolver_free_preparse+0x40/0x40 [ 34.370262] [] ? dns_resolver_free_preparse+0x40/0x40 [ 34.377073] [] key_create_or_update+0x35b/0xac0 [ 34.383363] [] ? key_type_lookup+0xd0/0xd0 [ 34.389219] [] ? lookup_user_key+0x10f/0xd10 [ 34.395249] [] ? lookup_user_key+0xa0b/0xd10 [ 34.401279] [] ? __check_object_size+0x248/0x38e [ 34.407656] [] SyS_add_key+0x1b4/0x390 [ 34.413531] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 34.421046] [] ? do_syscall_64+0x48/0x490 [ 34.426820] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 34.434325] [] do_syscall_64+0x1a6/0x490 [ 34.440009] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 34.447296] Dumping ftrace buffer: [ 34.450807] (ftrace buffer empty) [ 34.454487] Kernel Offset: disabled [ 34.458087] Rebooting in 86400 seconds..