[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.685701] 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: [ 17.158606] random: sshd: uninitialized urandom read (32 bytes read) [ 17.662426] random: sshd: uninitialized urandom read (32 bytes read) [ 18.665734] random: sshd: uninitialized urandom read (32 bytes read) [ 18.828769] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 24.311783] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 24.399595] ------------[ cut here ]------------ [ 24.404391] WARNING: CPU: 0 PID: 3792 at lib/vsprintf.c:1941 set_precision+0x144/0x170 [ 24.412418] precision 59591 too large[ 24.416028] Kernel panic - not syncing: panic_on_warn set ... [ 24.416028] [ 24.423380] CPU: 0 PID: 3792 Comm: syz-executor530 Not tainted 4.9.107-gdb2c520 #49 [ 24.431149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.440489] ffff8801beb876d0 ffffffff81eb3da9 ffffffff83c48b40 00000000ffffffff [ 24.448509] 0000000000000000 0000000000000000 0000000000000795 ffff8801beb87790 [ 24.456527] ffffffff81421925 0000000041b58ab3 ffffffff843b9b48 ffffffff81421766 [ 24.464546] Call Trace: [ 24.467109] [] dump_stack+0xc1/0x128 [ 24.472447] [] panic+0x1bf/0x3bc [ 24.477438] [] ? add_taint.cold.6+0x16/0x16 [ 24.483389] [] ? __warn.cold.9+0xa6/0x17f [ 24.489173] [] ? set_precision+0x144/0x170 [ 24.495032] [] __warn.cold.9+0xc1/0x17f [ 24.500633] [] ? unwind_next_frame+0x86/0xe0 [ 24.506666] [] warn_slowpath_fmt+0xc2/0x100 [ 24.512619] [] ? __warn+0x50/0x50 [ 24.517698] [] ? format_decode+0x1b1/0x9e0 [ 24.523591] [] ? set_precision+0x170/0x170 [ 24.529455] [] set_precision+0x144/0x170 [ 24.535154] [] vsnprintf+0x31e/0x1840 [ 24.540597] [] ? pointer+0xb00/0xb00 [ 24.545936] [] vscnprintf+0x2d/0x60 [ 24.551184] [] vprintk_emit+0xf4/0x790 [ 24.556697] [] vprintk+0x28/0x30 [ 24.561858] [] vprintk_default+0x1d/0x30 [ 24.567542] [] printk+0xaf/0xd7 [ 24.572444] [] ? log_wakeup_reason.cold.1+0x13f/0x13f [ 24.579259] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.586174] [] ? ___ratelimit+0x53/0x401 [ 24.591867] [] dns_resolver_preparse.cold.3+0x71/0x240 [ 24.598770] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.606284] [] ? dns_resolver_free_preparse+0x40/0x40 [ 24.613195] [] key_create_or_update+0x35b/0xac0 [ 24.619499] [] ? key_type_lookup+0xd0/0xd0 [ 24.625360] [] ? lookup_user_key+0x10f/0xd10 [ 24.631393] [] ? __check_object_size+0x248/0x38e [ 24.637774] [] SyS_add_key+0x1b4/0x390 [ 24.643283] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.650809] [] ? compat_SyS_setsockopt+0x2a0/0x2a0 [ 24.657459] [] ? do_fast_syscall_32+0xcf/0x870 [ 24.663676] [] ? key_get_type_from_user.constprop.9+0xe0/0xe0 [ 24.671191] [] do_fast_syscall_32+0x2f7/0x870 [ 24.677310] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.683951] [] entry_SYSENTER_compat+0x90/0xa2 [ 24.690824] Dumping ftrace buffer: [ 24.694356] (ftrace buffer empty) [ 24.698051] Kernel Offset: disabled [ 24.701651] Rebooting in 86400 seconds..