[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.578027] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.714370] random: sshd: uninitialized urandom read (32 bytes read) [ 18.158594] random: sshd: uninitialized urandom read (32 bytes read) [ 19.148739] random: sshd: uninitialized urandom read (32 bytes read) [ 19.296563] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 24.811507] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.894248] ------------[ cut here ]------------ [ 24.899011] WARNING: CPU: 0 PID: 3793 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 24.907030] precision 59591 too large[ 24.910623] Kernel panic - not syncing: panic_on_warn set ... [ 24.910623] [ 24.917970] CPU: 0 PID: 3793 Comm: syz-executor973 Not tainted 4.9.107-gdb2c520 #49 [ 24.925730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.935062] ffff8801d923f6e0 ffffffff81eb3da9 ffffffff83c48b40 00000000ffffffff [ 24.943031] 0000000000000000 0000000000000000 0000000000000795 ffff8801d923f7a0 [ 24.951003] ffffffff81421925 0000000041b58ab3 ffffffff843b9b48 ffffffff81421766 [ 24.958998] Call Trace: [ 24.961553] [] dump_stack+0xc1/0x128 [ 24.966889] [] panic+0x1bf/0x3bc [ 24.971880] [] ? add_taint.cold.6+0x16/0x16 [ 24.977818] [] ? __warn.cold.9+0xa6/0x17f [ 24.983586] [] ? set_precision+0x144/0x170 [ 24.989448] [] __warn.cold.9+0xc1/0x17f [ 24.995043] [] ? unwind_next_frame+0x86/0xe0 [ 25.001069] [] warn_slowpath_fmt+0xc2/0x100 [ 25.007015] [] ? __warn+0x50/0x50 [ 25.012085] [] ? format_decode+0x1b1/0x9e0 [ 25.017938] [] ? set_precision+0x170/0x170 [ 25.023790] [] set_precision+0x144/0x170 [ 25.029476] [] vsnprintf+0x31e/0x1840 [ 25.034905] [] ? pointer+0xb00/0xb00 [ 25.040237] [] vscnprintf+0x2d/0x60 [ 25.045481] [] vprintk_emit+0xf4/0x790 [ 25.050985] [] vprintk+0x28/0x30 [ 25.055968] [] vprintk_default+0x1d/0x30 [ 25.061647] [] printk+0xaf/0xd7 [ 25.066542] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 25.073353] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 25.080248] [] ? ___ratelimit+0x53/0x401 [ 25.085927] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 25.092823] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.099630] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.106439] [] key_create_or_update+0x35b/0xac0 [ 25.112726] [] ? key_type_lookup+0xd0/0xd0 [ 25.118585] [] ? lookup_user_key+0x10f/0xd10 [ 25.124612] [] ? __check_object_size+0x248/0x38e [ 25.130982] [] SyS_add_key+0x1b4/0x390 [ 25.136490] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.143991] [] ? do_syscall_64+0x48/0x490 [ 25.149756] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.157256] [] do_syscall_64+0x1a6/0x490 [ 25.162934] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 25.170326] Dumping ftrace buffer: [ 25.173832] (ftrace buffer empty) [ 25.177510] Kernel Offset: disabled [ 25.181106] Rebooting in 86400 seconds..