[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.779054] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.692524] random: sshd: uninitialized urandom read (32 bytes read) [ 18.149667] random: sshd: uninitialized urandom read (32 bytes read) [ 19.186103] random: sshd: uninitialized urandom read (32 bytes read) [ 19.335934] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 24.903721] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.994004] ------------[ cut here ]------------ [ 24.998972] WARNING: CPU: 0 PID: 3655 at lib/vsprintf.c:1938 set_precision+0x144/0x170 [ 25.007010] precision 1048186 too large[ 25.010812] Kernel panic - not syncing: panic_on_warn set ... [ 25.010812] [ 25.018187] CPU: 0 PID: 3655 Comm: syz-executor882 Not tainted 4.9.113-g47bbcd6 #10 [ 25.025961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.035329] ffff8801c35076e0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 25.043377] 0000000000000000 0000000000000000 0000000000000792 ffff8801c35077a0 [ 25.051445] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 25.059500] Call Trace: [ 25.062076] [] dump_stack+0xc1/0x128 [ 25.067438] [] panic+0x1bf/0x3bc [ 25.072450] [] ? add_taint.cold.6+0x16/0x16 [ 25.078469] [] ? __warn.cold.9+0xa6/0x17f [ 25.084270] [] ? set_precision+0x144/0x170 [ 25.090151] [] __warn.cold.9+0xc1/0x17f [ 25.095764] [] ? unwind_next_frame+0x86/0xe0 [ 25.101817] [] warn_slowpath_fmt+0xc2/0x100 [ 25.107776] [] ? __warn+0x50/0x50 [ 25.112870] [] ? format_decode+0x1b1/0x9e0 [ 25.118739] [] ? set_precision+0x170/0x170 [ 25.124630] [] set_precision+0x144/0x170 [ 25.130341] [] vsnprintf+0x31e/0x1840 [ 25.135788] [] ? pointer+0xb00/0xb00 [ 25.141415] [] vscnprintf+0x2d/0x60 [ 25.146694] [] vprintk_emit+0xf4/0x790 [ 25.152236] [] vprintk+0x28/0x30 [ 25.157255] [] vprintk_default+0x1d/0x30 [ 25.162979] [] printk+0xaf/0xd7 [ 25.167904] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 25.174739] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 25.181660] [] ? ___ratelimit+0x53/0x401 [ 25.187366] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 25.194302] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.201147] [] ? dns_resolver_free_preparse+0x40/0x40 [ 25.207996] [] key_create_or_update+0x35b/0xac0 [ 25.214330] [] ? key_type_lookup+0xd0/0xd0 [ 25.220225] [] ? lookup_user_key+0x10f/0xd10 [ 25.226276] [] ? __check_object_size+0x248/0x38e [ 25.232862] [] SyS_add_key+0x1b4/0x390 [ 25.238389] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.245913] [] ? do_syscall_64+0x48/0x490 [ 25.251703] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 25.259259] [] do_syscall_64+0x1a6/0x490 [ 25.264975] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 25.272553] Dumping ftrace buffer: [ 25.276080] (ftrace buffer empty) [ 25.279776] Kernel Offset: disabled [ 25.283387] Rebooting in 86400 seconds..