[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.062949] 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: [ 20.207256] random: sshd: uninitialized urandom read (32 bytes read) [ 20.555896] random: sshd: uninitialized urandom read (32 bytes read) [ 21.579583] random: sshd: uninitialized urandom read (32 bytes read) [ 27.890449] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. [ 33.335656] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.421068] ------------[ cut here ]------------ [ 33.425857] WARNING: CPU: 0 PID: 3675 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 33.433881] precision 59591 too large[ 33.437484] Kernel panic - not syncing: panic_on_warn set ... [ 33.437484] [ 33.444841] CPU: 0 PID: 3675 Comm: syz-executor984 Not tainted 4.9.107-g42a730a #45 [ 33.452603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.461932] ffff8801c2b2f6e0 ffffffff81eb42a9 ffffffff83c48b40 00000000ffffffff [ 33.469942] 0000000000000000 0000000000000000 0000000000000795 ffff8801c2b2f7a0 [ 33.477934] ffffffff81421e65 0000000041b58ab3 ffffffff843b9b50 ffffffff81421ca6 [ 33.485926] Call Trace: [ 33.488515] [] dump_stack+0xc1/0x128 [ 33.493856] [] panic+0x1bf/0x3bc [ 33.498854] [] ? add_taint.cold.6+0x16/0x16 [ 33.504803] [] ? __warn.cold.9+0xa6/0x17f [ 33.510584] [] ? set_precision+0x144/0x170 [ 33.516446] [] __warn.cold.9+0xc1/0x17f [ 33.522045] [] ? unwind_next_frame+0x86/0xe0 [ 33.528076] [] warn_slowpath_fmt+0xc2/0x100 [ 33.534032] [] ? __warn+0x50/0x50 [ 33.539121] [] ? format_decode+0x1b1/0x9e0 [ 33.544987] [] ? set_precision+0x170/0x170 [ 33.550847] [] set_precision+0x144/0x170 [ 33.556539] [] vsnprintf+0x31e/0x1840 [ 33.561974] [] ? pointer+0xb00/0xb00 [ 33.567312] [] vscnprintf+0x2d/0x60 [ 33.572568] [] vprintk_emit+0xf4/0x790 [ 33.578076] [] vprintk+0x28/0x30 [ 33.583068] [] vprintk_default+0x1d/0x30 [ 33.588753] [] printk+0xaf/0xd7 [ 33.593653] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 33.600465] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 33.607365] [] ? ___ratelimit+0x53/0x401 [ 33.613045] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 33.619943] [] ? dns_resolver_free_preparse+0x40/0x40 [ 33.626754] [] ? dns_resolver_free_preparse+0x40/0x40 [ 33.633564] [] key_create_or_update+0x35b/0xac0 [ 33.639854] [] ? key_type_lookup+0xd0/0xd0 [ 33.645711] [] ? lookup_user_key+0x10f/0xd10 [ 33.651745] [] ? __check_object_size+0x248/0x38e [ 33.658139] [] SyS_add_key+0x1b4/0x390 [ 33.663647] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 33.671152] [] ? do_syscall_64+0x48/0x490 [ 33.676923] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 33.684428] [] do_syscall_64+0x1a6/0x490 [ 33.690111] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 33.697461] Dumping ftrace buffer: [ 33.700972] (ftrace buffer empty) [ 33.704655] Kernel Offset: disabled [ 33.708253] Rebooting in 86400 seconds..