[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.608823] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.579893] random: sshd: uninitialized urandom read (32 bytes read) [ 19.822364] random: sshd: uninitialized urandom read (32 bytes read) [ 20.758704] random: sshd: uninitialized urandom read (32 bytes read) [ 20.896632] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 26.342054] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.427198] ------------[ cut here ]------------ [ 26.431982] WARNING: CPU: 0 PID: 3799 at lib/vsprintf.c:1938 set_precision+0x144/0x170 [ 26.440013] precision 1047814 too large[ 26.443790] Kernel panic - not syncing: panic_on_warn set ... [ 26.443790] [ 26.451143] CPU: 0 PID: 3799 Comm: syz-executor063 Not tainted 4.9.113-g47bbcd6 #14 [ 26.458906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.468259] ffff8801c65af6d0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 26.476254] 0000000000000000 0000000000000000 0000000000000792 ffff8801c65af790 [ 26.484240] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 26.492245] Call Trace: [ 26.494809] [] dump_stack+0xc1/0x128 [ 26.500245] [] panic+0x1bf/0x3bc [ 26.505248] [] ? add_taint.cold.6+0x16/0x16 [ 26.511210] [] ? __warn.cold.9+0xa6/0x17f [ 26.516995] [] ? set_precision+0x144/0x170 [ 26.522855] [] __warn.cold.9+0xc1/0x17f [ 26.528470] [] ? unwind_next_frame+0x86/0xe0 [ 26.534519] [] warn_slowpath_fmt+0xc2/0x100 [ 26.540465] [] ? __warn+0x50/0x50 [ 26.545543] [] ? format_decode+0x1b1/0x9e0 [ 26.551402] [] ? set_precision+0x170/0x170 [ 26.557268] [] set_precision+0x144/0x170 [ 26.562956] [] vsnprintf+0x31e/0x1840 [ 26.568382] [] ? pointer+0xb00/0xb00 [ 26.573728] [] vscnprintf+0x2d/0x60 [ 26.578984] [] vprintk_emit+0xf4/0x790 [ 26.584507] [] vprintk+0x28/0x30 [ 26.589506] [] vprintk_default+0x1d/0x30 [ 26.595187] [] printk+0xaf/0xd7 [ 26.600088] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 26.606904] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 26.613810] [] ? ___ratelimit+0x53/0x401 [ 26.619584] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 26.626488] [] ? dns_resolver_free_preparse+0x40/0x40 [ 26.633310] [] ? dns_resolver_free_preparse+0x40/0x40 [ 26.640121] [] key_create_or_update+0x35b/0xac0 [ 26.646413] [] ? key_type_lookup+0xd0/0xd0 [ 26.652273] [] ? lookup_user_key+0x10f/0xd10 [ 26.658306] [] ? __check_object_size+0x248/0x38e [ 26.664702] [] SyS_add_key+0x1b4/0x390 [ 26.670217] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 26.677737] [] ? do_fast_syscall_32+0xcf/0x870 [ 26.683946] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 26.691893] [] do_fast_syscall_32+0x2f7/0x870 [ 26.698036] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.704675] [] entry_SYSENTER_compat+0x90/0xa2 [ 26.711457] Dumping ftrace buffer: [ 26.714975] (ftrace buffer empty) [ 26.718655] Kernel Offset: disabled [ 26.722253] Rebooting in 86400 seconds..