[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.845796] 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: [ 22.795300] random: sshd: uninitialized urandom read (32 bytes read) [ 23.159868] random: sshd: uninitialized urandom read (32 bytes read) [ 23.954131] random: sshd: uninitialized urandom read (32 bytes read) [ 24.087404] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.51' (ECDSA) to the list of known hosts. [ 29.466145] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.550725] ------------[ cut here ]------------ [ 29.555508] WARNING: CPU: 0 PID: 3798 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 29.563535] precision 1046907 too large[ 29.567304] Kernel panic - not syncing: panic_on_warn set ... [ 29.567304] [ 29.574657] CPU: 0 PID: 3798 Comm: syz-executor018 Not tainted 4.9.99-gc462abb #20 [ 29.582336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.591664] ffff8801b676f6e0 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff [ 29.599643] 0000000000000000 0000000000000000 0000000000000795 ffff8801b676f7a0 [ 29.607732] ffffffff8141f855 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f696 [ 29.615721] Call Trace: [ 29.618287] [] dump_stack+0xc1/0x128 [ 29.623624] [] panic+0x1bf/0x3bc [ 29.628611] [] ? add_taint.cold.6+0x16/0x16 [ 29.634563] [] ? __warn.cold.9+0xa6/0x17f [ 29.640359] [] ? set_precision+0x144/0x170 [ 29.646220] [] __warn.cold.9+0xc1/0x17f [ 29.651824] [] ? unwind_next_frame+0x86/0xe0 [ 29.657855] [] warn_slowpath_fmt+0xc2/0x100 [ 29.663799] [] ? __warn+0x50/0x50 [ 29.668880] [] ? format_decode+0x1b1/0x9e0 [ 29.674746] [] ? set_precision+0x170/0x170 [ 29.680606] [] set_precision+0x144/0x170 [ 29.686297] [] vsnprintf+0x31e/0x1840 [ 29.691721] [] ? pointer+0xb00/0xb00 [ 29.697058] [] vscnprintf+0x2d/0x60 [ 29.702401] [] vprintk_emit+0xf4/0x790 [ 29.707910] [] vprintk+0x28/0x30 [ 29.712898] [] vprintk_default+0x1d/0x30 [ 29.718583] [] printk+0xaf/0xd7 [ 29.723495] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 29.730319] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 29.737219] [] ? ___ratelimit+0x53/0x401 [ 29.742910] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 29.749815] [] ? dns_resolver_free_preparse+0x40/0x40 [ 29.756626] [] ? dns_resolver_free_preparse+0x40/0x40 [ 29.763443] [] key_create_or_update+0x35b/0xac0 [ 29.769749] [] ? key_type_lookup+0xd0/0xd0 [ 29.775623] [] ? lookup_user_key+0x10f/0xd10 [ 29.781658] [] ? lookup_user_key+0xa0b/0xd10 [ 29.787693] [] ? __check_object_size+0x248/0x38e [ 29.794078] [] SyS_add_key+0x1b4/0x390 [ 29.799587] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 29.807091] [] ? do_syscall_64+0x48/0x490 [ 29.812861] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 29.820364] [] do_syscall_64+0x1a6/0x490 [ 29.826048] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 29.833449] Dumping ftrace buffer: [ 29.836968] (ftrace buffer empty) [ 29.840648] Kernel Offset: disabled [ 29.844251] Rebooting in 86400 seconds..