[ 16.275612] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [ 22.054322] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.404461] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 23.231719] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) [ 23.406273] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. [ 28.794469] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) executing program executing program [ 28.887812] ------------[ cut here ]------------ [ 28.892590] WARNING: CPU: 0 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 28.901838] Kernel panic - not syncing: panic_on_warn set ... [ 28.901838] [ 28.909174] CPU: 0 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #12 [ 28.915725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.925053] 0000000000000000 2f70d8eb21590ca4 ffff8801da20fa38 ffffffff81d0457d [ 28.933033] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 28.941010] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 28.948992] Call Trace: [ 28.951555] [] dump_stack+0xc1/0x124 [ 28.956895] [] panic+0x1aa/0x388 [ 28.961885] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.968782] [] ? pm_qos_get_value.part.4+0xb/0xb [ 28.975162] [] ? warn_slowpath_common+0x10a/0x140 [ 28.981628] [] warn_slowpath_common+0x125/0x140 [ 28.987921] [] ? task_participate_group_stop+0x21d/0x2d0 [ 28.994990] [] warn_slowpath_null+0x29/0x30 [ 29.000931] [] task_participate_group_stop+0x21d/0x2d0 [ 29.007827] [] ? do_signal_stop+0x385/0x7a0 [ 29.013768] [] do_signal_stop+0x19b/0x7a0 [ 29.019539] [] get_signal+0x4c8/0x1660 [ 29.025048] [] do_signal+0x8b/0x1d40 [ 29.030385] [] ? __might_fault+0x18e/0x1d0 [ 29.036241] [] ? __might_fault+0xe4/0x1d0 [ 29.042010] [] ? setup_sigcontext+0x780/0x780 [ 29.048128] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 29.054681] [] ? kvm_clock_get_cycles+0x9/0x10 [ 29.060888] [] ? poll_select_set_timeout+0xa6/0x110 [ 29.067540] [] ? SyS_select+0x168/0x1d0 [ 29.073134] [] ? exit_to_usermode_loop+0xec/0x170 [ 29.079598] [] exit_to_usermode_loop+0x122/0x170 [ 29.085976] [] syscall_return_slowpath+0x1b5/0x1f0 [ 29.092529] [] int_ret_from_sys_call+0x25/0x9f [ 30.227300] Shutting down cpus with NMI [ 30.231700] Dumping ftrace buffer: [ 30.235288] (ftrace buffer empty) [ 30.238964] Kernel Offset: disabled [ 30.242591] Rebooting in 86400 seconds..