[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.120879] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.142677] random: sshd: uninitialized urandom read (32 bytes read) [ 19.502585] random: sshd: uninitialized urandom read (32 bytes read) [ 20.318341] random: sshd: uninitialized urandom read (32 bytes read) [ 20.457214] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 25.961544] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.046429] ------------[ cut here ]------------ [ 26.051242] WARNING: CPU: 1 PID: 3803 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 26.059272] precision 1046907 too large[ 26.063049] Kernel panic - not syncing: panic_on_warn set ... [ 26.063049] [ 26.070415] CPU: 1 PID: 3803 Comm: syz-executor529 Not tainted 4.9.99-gc2f9bce #25 [ 26.078094] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.087422] ffff8801b57af6d0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 26.095443] 0000000000000000 0000000000000001 0000000000000795 ffff8801b57af790 [ 26.103421] ffffffff8141f855 0000000041b58ab3 ffffffff843b8768 ffffffff8141f696 [ 26.111409] Call Trace: [ 26.113978] [] dump_stack+0xc1/0x128 [ 26.119317] [] panic+0x1bf/0x3bc [ 26.124308] [] ? add_taint.cold.6+0x16/0x16 [ 26.130249] [] ? __warn.cold.9+0xa6/0x17f [ 26.136020] [] ? set_precision+0x144/0x170 [ 26.141875] [] __warn.cold.9+0xc1/0x17f [ 26.147473] [] ? unwind_next_frame+0x86/0xe0 [ 26.153502] [] warn_slowpath_fmt+0xc2/0x100 [ 26.159442] [] ? __warn+0x50/0x50 [ 26.164515] [] ? format_decode+0x1b1/0x9e0 [ 26.170372] [] ? set_precision+0x170/0x170 [ 26.176229] [] set_precision+0x144/0x170 [ 26.181930] [] vsnprintf+0x31e/0x1840 [ 26.187348] [] ? pointer+0xb00/0xb00 [ 26.192683] [] vscnprintf+0x2d/0x60 [ 26.197939] [] vprintk_emit+0xf4/0x790 [ 26.203450] [] vprintk+0x28/0x30 [ 26.208436] [] vprintk_default+0x1d/0x30 [ 26.214118] [] printk+0xaf/0xd7 [ 26.219034] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 26.225848] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 26.232743] [] ? ___ratelimit+0x53/0x401 [ 26.238424] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 26.245321] [] ? dns_resolver_free_preparse+0x40/0x40 [ 26.252127] [] ? dns_resolver_free_preparse+0x40/0x40 [ 26.258938] [] key_create_or_update+0x35b/0xac0 [ 26.265224] [] ? key_type_lookup+0xd0/0xd0 [ 26.271080] [] ? lookup_user_key+0x10f/0xd10 [ 26.277109] [] ? lookup_user_key+0xa0b/0xd10 [ 26.283138] [] ? __check_object_size+0x248/0x38e [ 26.289517] [] SyS_add_key+0x1b4/0x390 [ 26.295031] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 26.302542] [] ? __do_page_fault+0x183/0xd50 [ 26.308573] [] ? do_fast_syscall_32+0xcf/0x870 [ 26.314773] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 26.322275] [] do_fast_syscall_32+0x2f7/0x870 [ 26.328405] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.335044] [] entry_SYSENTER_compat+0x90/0xa2 [ 26.341706] Dumping ftrace buffer: [ 26.345218] (ftrace buffer empty) [ 26.348902] Kernel Offset: disabled [ 26.352499] Rebooting in 86400 seconds..