[....] Starting [ 16.515714] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) 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: [ 22.026593] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.216058] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.986200] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 23.159815] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 28.547158] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) executing program executing program [ 28.643606] ------------[ cut here ]------------ [ 28.648421] WARNING: CPU: 1 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 28.657668] Kernel panic - not syncing: panic_on_warn set ... [ 28.657668] [ 28.665003] CPU: 1 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #4 [ 28.671461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.680781] 0000000000000000 017731753b5047f1 ffff8801da20fa38 ffffffff81d0457d [ 28.688729] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 28.696675] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 28.704620] Call Trace: [ 28.707174] [] dump_stack+0xc1/0x124 [ 28.712538] [] panic+0x1aa/0x388 [ 28.717520] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.724411] [] ? pm_qos_get_value.part.4+0xb/0xb [ 28.730782] [] ? warn_slowpath_common+0x10a/0x140 [ 28.737238] [] warn_slowpath_common+0x125/0x140 [ 28.745449] [] ? task_participate_group_stop+0x21d/0x2d0 [ 28.752512] [] warn_slowpath_null+0x29/0x30 [ 28.758446] [] task_participate_group_stop+0x21d/0x2d0 [ 28.765335] [] ? do_signal_stop+0x385/0x7a0 [ 28.771268] [] do_signal_stop+0x19b/0x7a0 [ 28.777029] [] get_signal+0x4c8/0x1660 [ 28.782530] [] do_signal+0x8b/0x1d40 [ 28.787860] [] ? __might_fault+0x18e/0x1d0 [ 28.793707] [] ? __might_fault+0xe4/0x1d0 [ 28.799467] [] ? setup_sigcontext+0x780/0x780 [ 28.805595] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 28.812140] [] ? kvm_clock_get_cycles+0x9/0x10 [ 28.818334] [] ? poll_select_set_timeout+0xa6/0x110 [ 28.824962] [] ? SyS_select+0x168/0x1d0 [ 28.830550] [] ? exit_to_usermode_loop+0xec/0x170 [ 28.837007] [] exit_to_usermode_loop+0x122/0x170 [ 28.843376] [] syscall_return_slowpath+0x1b5/0x1f0 [ 28.849918] [] int_ret_from_sys_call+0x25/0x9f [ 29.919259] Shutting down cpus with NMI [ 29.923622] Dumping ftrace buffer: [ 29.927227] (ftrace buffer empty) [ 29.930905] Kernel Offset: disabled [ 29.934534] Rebooting in 86400 seconds..