[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.262136] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 17.016283] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.665434] random: sshd: uninitialized urandom read (32 bytes read) [ 18.435149] random: sshd: uninitialized urandom read (32 bytes read) [ 18.567418] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts. [ 24.035506] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.117067] ------------[ cut here ]------------ [ 24.121856] WARNING: CPU: 1 PID: 3791 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 24.129880] precision 1048570 too large[ 24.133648] Kernel panic - not syncing: panic_on_warn set ... [ 24.133648] [ 24.140999] CPU: 1 PID: 3791 Comm: syz-executor248 Not tainted 4.9.98-g63a812b #20 [ 24.148675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.158009] ffff8801b60376e0 ffffffff81eb0e89 ffffffff83c484a0 00000000ffffffff [ 24.165988] 0000000000000000 0000000000000001 0000000000000795 ffff8801b60377a0 [ 24.173966] ffffffff8141f835 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f676 [ 24.181954] Call Trace: [ 24.184517] [] dump_stack+0xc1/0x128 [ 24.189855] [] panic+0x1bf/0x3bc [ 24.194841] [] ? add_taint.cold.6+0x16/0x16 [ 24.200782] [] ? __warn.cold.9+0xa6/0x17f [ 24.206583] [] ? set_precision+0x144/0x170 [ 24.212445] [] __warn.cold.9+0xc1/0x17f [ 24.218039] [] ? unwind_next_frame+0x86/0xe0 [ 24.224067] [] warn_slowpath_fmt+0xc2/0x100 [ 24.230009] [] ? __warn+0x50/0x50 [ 24.235091] [] ? format_decode+0x1b1/0x9e0 [ 24.240947] [] ? set_precision+0x170/0x170 [ 24.246802] [] set_precision+0x144/0x170 [ 24.252482] [] vsnprintf+0x31e/0x1840 [ 24.257911] [] ? pointer+0xb00/0xb00 [ 24.263243] [] vscnprintf+0x2d/0x60 [ 24.268493] [] vprintk_emit+0xf4/0x790 [ 24.274016] [] vprintk+0x28/0x30 [ 24.279003] [] vprintk_default+0x1d/0x30 [ 24.284685] [] printk+0xaf/0xd7 [ 24.289594] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 24.296411] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.303307] [] ? ___ratelimit+0x53/0x401 [ 24.308987] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 24.315885] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.322700] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.329512] [] key_create_or_update+0x35b/0xac0 [ 24.335802] [] ? key_type_lookup+0xd0/0xd0 [ 24.341659] [] ? lookup_user_key+0x10f/0xd10 [ 24.347687] [] ? lookup_user_key+0xa0b/0xd10 [ 24.353719] [] ? __check_object_size+0x248/0x38e [ 24.360093] [] SyS_add_key+0x1b4/0x390 [ 24.365609] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.373114] [] ? do_syscall_64+0x48/0x490 [ 24.378883] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.386389] [] do_syscall_64+0x1a6/0x490 [ 24.392077] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.399424] Dumping ftrace buffer: [ 24.402943] (ftrace buffer empty) [ 24.406624] Kernel Offset: disabled [ 24.410221] Rebooting in 86400 seconds..