[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.004253] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.505196] random: sshd: uninitialized urandom read (32 bytes read) [ 17.818981] random: sshd: uninitialized urandom read (32 bytes read) [ 18.776918] random: sshd: uninitialized urandom read (32 bytes read) [ 18.916116] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. [ 24.352571] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.442419] ------------[ cut here ]------------ [ 24.447283] WARNING: CPU: 1 PID: 3689 at lib/vsprintf.c:1938 set_precision+0x144/0x170 [ 24.455347] precision 1047814 too large[ 24.459120] Kernel panic - not syncing: panic_on_warn set ... [ 24.459120] [ 24.466473] CPU: 1 PID: 3689 Comm: syz-executor432 Not tainted 4.9.113-g47bbcd6 #62 [ 24.474238] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.483567] ffff8801c119f6e0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 24.491577] 0000000000000000 0000000000000001 0000000000000792 ffff8801c119f7a0 [ 24.499563] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 24.507569] Call Trace: [ 24.510135] [] dump_stack+0xc1/0x128 [ 24.515484] [] panic+0x1bf/0x3bc [ 24.520476] [] ? add_taint.cold.6+0x16/0x16 [ 24.526438] [] ? __warn.cold.9+0xa6/0x17f [ 24.532222] [] ? set_precision+0x144/0x170 [ 24.538082] [] __warn.cold.9+0xc1/0x17f [ 24.543699] [] ? unwind_next_frame+0x86/0xe0 [ 24.549749] [] warn_slowpath_fmt+0xc2/0x100 [ 24.555706] [] ? __warn+0x50/0x50 [ 24.560792] [] ? format_decode+0x1b1/0x9e0 [ 24.566668] [] ? set_precision+0x170/0x170 [ 24.572540] [] set_precision+0x144/0x170 [ 24.578225] [] vsnprintf+0x31e/0x1840 [ 24.583666] [] ? pointer+0xb00/0xb00 [ 24.589009] [] vscnprintf+0x2d/0x60 [ 24.594265] [] vprintk_emit+0xf4/0x790 [ 24.599795] [] vprintk+0x28/0x30 [ 24.604788] [] vprintk_default+0x1d/0x30 [ 24.610476] [] printk+0xaf/0xd7 [ 24.615381] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 24.622211] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.629133] [] ? ___ratelimit+0x53/0x401 [ 24.634820] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 24.641733] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.648644] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.655470] [] key_create_or_update+0x35b/0xac0 [ 24.661764] [] ? key_type_lookup+0xd0/0xd0 [ 24.667624] [] ? lookup_user_key+0x10f/0xd10 [ 24.673670] [] ? __check_object_size+0x248/0x38e [ 24.680049] [] SyS_add_key+0x1b4/0x390 [ 24.685573] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.693084] [] ? do_syscall_64+0x48/0x490 [ 24.698864] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.706383] [] do_syscall_64+0x1a6/0x490 [ 24.712066] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.719481] Dumping ftrace buffer: [ 24.723005] (ftrace buffer empty) [ 24.726691] Kernel Offset: disabled [ 24.730290] Rebooting in 86400 seconds..