[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.152148] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.387362] random: sshd: uninitialized urandom read (32 bytes read) [ 19.901001] random: sshd: uninitialized urandom read (32 bytes read) [ 20.679944] random: sshd: uninitialized urandom read (32 bytes read) [ 20.805098] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.11' (ECDSA) to the list of known hosts. [ 26.728965] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.815271] ------------[ cut here ]------------ [ 26.820059] WARNING: CPU: 1 PID: 3799 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 26.828093] precision 1048570 too large[ 26.831865] Kernel panic - not syncing: panic_on_warn set ... [ 26.831865] [ 26.839218] CPU: 1 PID: 3799 Comm: syz-executor507 Not tainted 4.9.98-gf5a861c #19 [ 26.846905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.856233] ffff8801d97576d0 ffffffff81eb0fc9 ffffffff83c484a0 00000000ffffffff [ 26.864230] 0000000000000000 0000000000000001 0000000000000795 ffff8801d9757790 [ 26.872221] ffffffff8141f975 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f7b6 [ 26.880212] Call Trace: [ 26.882781] [] dump_stack+0xc1/0x128 [ 26.888127] [] panic+0x1bf/0x3bc [ 26.893115] [] ? add_taint.cold.6+0x16/0x16 [ 26.899059] [] ? __warn.cold.9+0xa6/0x17f [ 26.904832] [] ? set_precision+0x144/0x170 [ 26.910690] [] __warn.cold.9+0xc1/0x17f [ 26.916331] [] ? unwind_next_frame+0x86/0xe0 [ 26.922365] [] warn_slowpath_fmt+0xc2/0x100 [ 26.928309] [] ? __warn+0x50/0x50 [ 26.933383] [] ? format_decode+0x1b1/0x9e0 [ 26.939240] [] ? set_precision+0x170/0x170 [ 26.945094] [] set_precision+0x144/0x170 [ 26.950796] [] vsnprintf+0x31e/0x1840 [ 26.956235] [] ? pointer+0xb00/0xb00 [ 26.961572] [] vscnprintf+0x2d/0x60 [ 26.966820] [] vprintk_emit+0xf4/0x790 [ 26.972328] [] vprintk+0x28/0x30 [ 26.977314] [] vprintk_default+0x1d/0x30 [ 26.982998] [] printk+0xaf/0xd7 [ 26.987901] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 26.994714] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 27.001614] [] ? ___ratelimit+0x53/0x401 [ 27.007298] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 27.014195] [] ? dns_resolver_free_preparse+0x40/0x40 [ 27.021005] [] ? dns_resolver_free_preparse+0x40/0x40 [ 27.027815] [] key_create_or_update+0x35b/0xac0 [ 27.034103] [] ? key_type_lookup+0xd0/0xd0 [ 27.039959] [] ? lookup_user_key+0x10f/0xd10 [ 27.045988] [] ? lookup_user_key+0xa0b/0xd10 [ 27.052020] [] ? __check_object_size+0x248/0x38e [ 27.058396] [] SyS_add_key+0x1b4/0x390 [ 27.063905] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 27.071415] [] ? compat_SyS_setsockopt+0x2a0/0x2a0 [ 27.077969] [] ? do_fast_syscall_32+0xcf/0x870 [ 27.084174] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 27.091678] [] do_fast_syscall_32+0x2f7/0x870 [ 27.097796] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.104434] [] entry_SYSENTER_compat+0x90/0xa2 [ 27.111117] Dumping ftrace buffer: [ 27.114636] (ftrace buffer empty) [ 27.118321] Kernel Offset: disabled [ 27.121922] Rebooting in 86400 seconds..