[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.867772] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 14.323364] random: sshd: uninitialized urandom read (32 bytes read) [ 14.562280] random: sshd: uninitialized urandom read (32 bytes read) [ 15.263785] random: sshd: uninitialized urandom read (32 bytes read) [ 15.400794] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. [ 20.809625] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 20.885961] ------------[ cut here ]------------ [ 20.890738] WARNING: CPU: 0 PID: 3787 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 20.898760] precision 1048025 too large[ 20.902528] Kernel panic - not syncing: panic_on_warn set ... [ 20.902528] [ 20.909877] CPU: 0 PID: 3787 Comm: syz-executor000 Not tainted 4.9.97-g1321d42 #16 [ 20.917551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.926874] ffff8801d946f6d0 ffffffff81eb0b69 ffffffff83c484a0 00000000ffffffff [ 20.934850] 0000000000000000 0000000000000000 0000000000000795 ffff8801d946f790 [ 20.942826] ffffffff8141f975 0000000041b58ab3 ffffffff843b8408 ffffffff8141f7b6 [ 20.950801] Call Trace: [ 20.953360] [] dump_stack+0xc1/0x128 [ 20.958693] [] panic+0x1bf/0x3bc [ 20.963678] [] ? add_taint.cold.6+0x16/0x16 [ 20.969616] [] ? __warn.cold.9+0xa6/0x17f [ 20.975385] [] ? set_precision+0x144/0x170 [ 20.981239] [] __warn.cold.9+0xc1/0x17f [ 20.986834] [] ? unwind_next_frame+0x86/0xe0 [ 20.992865] [] warn_slowpath_fmt+0xc2/0x100 [ 20.998803] [] ? __warn+0x50/0x50 [ 21.003878] [] ? format_decode+0x1b1/0x9e0 [ 21.009732] [] ? set_precision+0x170/0x170 [ 21.015591] [] set_precision+0x144/0x170 [ 21.021270] [] vsnprintf+0x31e/0x1840 [ 21.026689] [] ? pointer+0xb00/0xb00 [ 21.032020] [] vscnprintf+0x2d/0x60 [ 21.037268] [] vprintk_emit+0xf4/0x790 [ 21.042771] [] vprintk+0x28/0x30 [ 21.047757] [] vprintk_default+0x1d/0x30 [ 21.053434] [] printk+0xaf/0xd7 [ 21.058333] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 21.065146] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 21.072049] [] ? ___ratelimit+0x53/0x401 [ 21.077731] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 21.084624] [] ? dns_resolver_free_preparse+0x40/0x40 [ 21.091432] [] ? dns_resolver_free_preparse+0x40/0x40 [ 21.098243] [] key_create_or_update+0x35b/0xac0 [ 21.104535] [] ? key_type_lookup+0xd0/0xd0 [ 21.110388] [] ? lookup_user_key+0x10f/0xd10 [ 21.116413] [] ? lookup_user_key+0xa0b/0xd10 [ 21.122443] [] ? __check_object_size+0x248/0x38e [ 21.128818] [] SyS_add_key+0x1b4/0x390 [ 21.134325] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 21.141829] [] ? __do_page_fault+0x183/0xd50 [ 21.147855] [] ? do_fast_syscall_32+0xcf/0x870 [ 21.154055] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 21.161555] [] do_fast_syscall_32+0x2f7/0x870 [ 21.167669] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 21.174307] [] entry_SYSENTER_compat+0x90/0xa2 [ 21.181026] Dumping ftrace buffer: [ 21.184536] (ftrace buffer empty) [ 21.188215] Kernel Offset: disabled [ 21.191820] Rebooting in 86400 seconds..