[ 16.750726] 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: [ 22.233419] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.761528] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 23.660003] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 26.162852] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) Warning: Permanently added '10.128.15.214' (ECDSA) to the list of known hosts. [ 31.523988] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available) executing program executing program executing program executing program executing program [ 31.627567] ------------[ cut here ]------------ [ 31.632366] WARNING: CPU: 0 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 31.641640] Kernel panic - not syncing: panic_on_warn set ... [ 31.641640] [ 31.648977] CPU: 0 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #4 [ 31.655439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.664762] 0000000000000000 97cc29f8b0898c29 ffff8801da20fa38 ffffffff81d0457d [ 31.672738] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 31.680712] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 31.688694] Call Trace: [ 31.692213] [] dump_stack+0xc1/0x124 [ 31.697550] [] panic+0x1aa/0x388 [ 31.702541] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 31.709438] [] ? pm_qos_get_value.part.4+0xb/0xb [ 31.715816] [] ? warn_slowpath_common+0x10a/0x140 [ 31.722279] [] warn_slowpath_common+0x125/0x140 [ 31.728569] [] ? task_participate_group_stop+0x21d/0x2d0 [ 31.735643] [] warn_slowpath_null+0x29/0x30 [ 31.741589] [] task_participate_group_stop+0x21d/0x2d0 [ 31.748486] [] ? do_signal_stop+0x385/0x7a0 [ 31.754430] [] do_signal_stop+0x19b/0x7a0 [ 31.760198] [] get_signal+0x4c8/0x1660 [ 31.765708] [] do_signal+0x8b/0x1d40 [ 31.771046] [] ? __might_fault+0x18e/0x1d0 [ 31.776901] [] ? __might_fault+0xe4/0x1d0 [ 31.782669] [] ? setup_sigcontext+0x780/0x780 [ 31.788791] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 31.795341] [] ? kvm_clock_get_cycles+0x9/0x10 [ 31.801544] [] ? poll_select_set_timeout+0xa6/0x110 [ 31.808182] [] ? SyS_select+0x168/0x1d0 [ 31.813778] [] ? exit_to_usermode_loop+0xec/0x170 [ 31.820241] [] exit_to_usermode_loop+0x122/0x170 [ 31.826617] [] syscall_return_slowpath+0x1b5/0x1f0 [ 31.833166] [] int_ret_from_sys_call+0x25/0x9f [ 32.969281] Shutting down cpus with NMI [ 32.974033] Dumping ftrace buffer: [ 32.977634] (ftrace buffer empty) [ 32.981329] Kernel Offset: disabled [ 32.984957] Rebooting in 86400 seconds..