[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.593502] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 14.980028] random: sshd: uninitialized urandom read (32 bytes read) [ 15.135579] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.928365] random: sshd: uninitialized urandom read (32 bytes read) [ 23.062123] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. [ 28.683683] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.767073] ------------[ cut here ]------------ [ 28.771897] WARNING: CPU: 0 PID: 3808 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 28.779932] precision 1048368 too large[ 28.783722] Kernel panic - not syncing: panic_on_warn set ... [ 28.783722] [ 28.791099] CPU: 0 PID: 3808 Comm: syz-executor193 Not tainted 4.9.99-gc2f9bce #25 [ 28.798780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.808116] ffff8801c85ef6d0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 28.816111] 0000000000000000 0000000000000000 0000000000000795 ffff8801c85ef790 [ 28.824121] ffffffff8141f855 0000000041b58ab3 ffffffff843b8768 ffffffff8141f696 [ 28.832137] Call Trace: [ 28.834716] [] dump_stack+0xc1/0x128 [ 28.840067] [] panic+0x1bf/0x3bc [ 28.845071] [] ? add_taint.cold.6+0x16/0x16 [ 28.851023] [] ? __warn.cold.9+0xa6/0x17f [ 28.856811] [] ? set_precision+0x144/0x170 [ 28.862680] [] __warn.cold.9+0xc1/0x17f [ 28.868289] [] ? unwind_next_frame+0x86/0xe0 [ 28.874339] [] warn_slowpath_fmt+0xc2/0x100 [ 28.880296] [] ? __warn+0x50/0x50 [ 28.885399] [] ? format_decode+0x1b1/0x9e0 [ 28.891273] [] ? set_precision+0x170/0x170 [ 28.897240] [] set_precision+0x144/0x170 [ 28.902952] [] vsnprintf+0x31e/0x1840 [ 28.908387] [] ? pointer+0xb00/0xb00 [ 28.913737] [] vscnprintf+0x2d/0x60 [ 28.919007] [] vprintk_emit+0xf4/0x790 [ 28.924540] [] vprintk+0x28/0x30 [ 28.929581] [] vprintk_default+0x1d/0x30 [ 28.935280] [] printk+0xaf/0xd7 [ 28.940208] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 28.947040] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 28.954055] [] ? ___ratelimit+0x53/0x401 [ 28.959755] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 28.966679] [] ? dns_resolver_free_preparse+0x40/0x40 [ 28.973508] [] ? dns_resolver_free_preparse+0x40/0x40 [ 28.980339] [] key_create_or_update+0x35b/0xac0 [ 28.986656] [] ? key_type_lookup+0xd0/0xd0 [ 28.992531] [] ? lookup_user_key+0x10f/0xd10 [ 28.998569] [] ? lookup_user_key+0xa0b/0xd10 [ 29.004608] [] ? __check_object_size+0x248/0x38e [ 29.011006] [] SyS_add_key+0x1b4/0x390 [ 29.016805] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 29.024606] [] ? __do_page_fault+0x183/0xd50 [ 29.030653] [] ? do_fast_syscall_32+0xcf/0x870 [ 29.036890] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 29.044415] [] do_fast_syscall_32+0x2f7/0x870 [ 29.050559] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.057219] [] entry_SYSENTER_compat+0x90/0xa2 [ 29.063891] Dumping ftrace buffer: [ 29.067421] (ftrace buffer empty) [ 29.071109] Kernel Offset: disabled [ 29.074716] Rebooting in 86400 seconds..