[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.746451] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.589891] random: sshd: uninitialized urandom read (32 bytes read) [ 18.840526] random: sshd: uninitialized urandom read (32 bytes read) [ 19.775766] random: sshd: uninitialized urandom read (32 bytes read) [ 19.898791] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 25.393062] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 25.483825] ------------[ cut here ]------------ [ 25.488606] WARNING: CPU: 1 PID: 3795 at lib/vsprintf.c:1938 set_precision+0x144/0x170 [ 25.496638] precision 1048186 too large[ 25.500412] Kernel panic - not syncing: panic_on_warn set ... [ 25.500412] [ 25.507774] CPU: 1 PID: 3795 Comm: syz-executor237 Not tainted 4.9.113-g47bbcd6 #62 [ 25.515540] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.524875] ffff8801b5e2f6e0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 25.532874] 0000000000000000 0000000000000001 0000000000000792 ffff8801b5e2f7a0 [ 25.540881] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 25.548898] Call Trace: [ 25.551462] [] dump_stack+0xc1/0x128 [ 25.556810] [] panic+0x1bf/0x3bc [ 25.561802] [] ? add_taint.cold.6+0x16/0x16 [ 25.567749] [] ? __warn.cold.9+0xa6/0x17f [ 25.573519] [] ? set_precision+0x144/0x170 [ 25.579385] [] __warn.cold.9+0xc1/0x17f [ 25.584986] [] ? unwind_next_frame+0x86/0xe0 [ 25.591018] [] warn_slowpath_fmt+0xc2/0x100 [ 25.596962] [] ? __warn+0x50/0x50 [ 25.602048] [] ? format_decode+0x1b1/0x9e0 [ 25.607903] [] ? set_precision+0x170/0x170 [ 25.613848] [] set_precision+0x144/0x170 [ 25.619532] [] vsnprintf+0x31e/0x1840 [ 25.624957] [] ? pointer+0xb00/0xb00 [ 25.630391] [] vscnprintf+0x2d/0x60 [ 25.635647] [] vprintk_emit+0xf4/0x790 [ 25.641164] [] vprintk+0x28/0x30 [ 25.646158] [] vprintk_default+0x1d/0x30 [ 25.651841] [] printk+0xaf/0xd7 [ 25.656742] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 25.663561] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 25.670469] [] ? ___ratelimit+0x53/0x401 [ 25.676154] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 25.683058] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.689871] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.696691] [] key_create_or_update+0x35b/0xac0 [ 25.702980] [] ? key_type_lookup+0xd0/0xd0 [ 25.708931] [] ? lookup_user_key+0x10f/0xd10 [ 25.714963] [] ? __check_object_size+0x248/0x38e [ 25.721428] [] SyS_add_key+0x1b4/0x390 [ 25.727031] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.734632] [] ? do_syscall_64+0x48/0x490 [ 25.740488] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.748013] [] do_syscall_64+0x1a6/0x490 [ 25.753705] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 25.761119] Dumping ftrace buffer: [ 25.764636] (ftrace buffer empty) [ 25.768326] Kernel Offset: disabled [ 25.771934] Rebooting in 86400 seconds..