[ 15.586435] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.720112] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.058449] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.885668] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) [ 31.144620] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. [ 36.521218] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) executing program executing program executing program executing program [ 36.615212] ------------[ cut here ]------------ [ 36.620016] WARNING: CPU: 1 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 36.629239] Kernel panic - not syncing: panic_on_warn set ... [ 36.629239] [ 36.636566] CPU: 1 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #12 [ 36.643105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.652423] 0000000000000000 3903559981192249 ffff8801da20fa38 ffffffff81d0457d [ 36.660372] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 36.668316] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 36.676261] Call Trace: [ 36.678816] [] dump_stack+0xc1/0x124 [ 36.684145] [] panic+0x1aa/0x388 [ 36.689126] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 36.696018] [] ? pm_qos_get_value.part.4+0xb/0xb [ 36.702387] [] ? warn_slowpath_common+0x10a/0x140 [ 36.708845] [] warn_slowpath_common+0x125/0x140 [ 36.715126] [] ? task_participate_group_stop+0x21d/0x2d0 [ 36.722200] [] warn_slowpath_null+0x29/0x30 [ 36.728138] [] task_participate_group_stop+0x21d/0x2d0 [ 36.735025] [] ? do_signal_stop+0x385/0x7a0 [ 36.740958] [] do_signal_stop+0x19b/0x7a0 [ 36.746718] [] get_signal+0x4c8/0x1660 [ 36.752221] [] do_signal+0x8b/0x1d40 [ 36.757549] [] ? __might_fault+0x18e/0x1d0 [ 36.763397] [] ? __might_fault+0xe4/0x1d0 [ 36.769158] [] ? setup_sigcontext+0x780/0x780 [ 36.775275] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 36.781818] [] ? kvm_clock_get_cycles+0x9/0x10 [ 36.788011] [] ? poll_select_set_timeout+0xa6/0x110 [ 36.794641] [] ? SyS_select+0x168/0x1d0 [ 36.800226] [] ? exit_to_usermode_loop+0xec/0x170 [ 36.806680] [] exit_to_usermode_loop+0x122/0x170 [ 36.813058] [] syscall_return_slowpath+0x1b5/0x1f0 [ 36.819599] [] int_ret_from_sys_call+0x25/0x9f [ 37.886778] Shutting down cpus with NMI [ 37.891160] Dumping ftrace buffer: [ 37.894755] (ftrace buffer empty) [ 37.898441] Kernel Offset: disabled [ 37.902074] Rebooting in 86400 seconds..