[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.539824] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.734285] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.021822] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.856515] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available) [ 28.446157] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) Warning: Permanently added '10.128.15.214' (ECDSA) to the list of known hosts. [ 33.841660] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available) executing program executing program [ 33.941499] ------------[ cut here ]------------ [ 33.946289] WARNING: CPU: 1 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 33.956245] Kernel panic - not syncing: panic_on_warn set ... [ 33.956245] [ 33.963593] CPU: 1 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #4 [ 33.970055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.979377] 0000000000000000 8643fd08442a7499 ffff8801da20fa38 ffffffff81d0457d [ 33.987361] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 33.995374] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 34.003371] Call Trace: [ 34.005931] [] dump_stack+0xc1/0x124 [ 34.011275] [] panic+0x1aa/0x388 [ 34.016263] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 34.023163] [] ? pm_qos_get_value.part.4+0xb/0xb [ 34.029541] [] ? warn_slowpath_common+0x10a/0x140 [ 34.036005] [] warn_slowpath_common+0x125/0x140 [ 34.042296] [] ? task_participate_group_stop+0x21d/0x2d0 [ 34.049372] [] warn_slowpath_null+0x29/0x30 [ 34.055313] [] task_participate_group_stop+0x21d/0x2d0 [ 34.062206] [] ? do_signal_stop+0x385/0x7a0 [ 34.068143] [] do_signal_stop+0x19b/0x7a0 [ 34.073918] [] get_signal+0x4c8/0x1660 [ 34.079434] [] do_signal+0x8b/0x1d40 [ 34.084766] [] ? __might_fault+0x18e/0x1d0 [ 34.090617] [] ? __might_fault+0xe4/0x1d0 [ 34.096382] [] ? setup_sigcontext+0x780/0x780 [ 34.102497] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 34.109046] [] ? kvm_clock_get_cycles+0x9/0x10 [ 34.115246] [] ? poll_select_set_timeout+0xa6/0x110 [ 34.121880] [] ? SyS_select+0x168/0x1d0 [ 34.127476] [] ? exit_to_usermode_loop+0xec/0x170 [ 34.133935] [] exit_to_usermode_loop+0x122/0x170 [ 34.140314] [] syscall_return_slowpath+0x1b5/0x1f0 [ 34.146879] [] int_ret_from_sys_call+0x25/0x9f [ 35.218052] Shutting down cpus with NMI [ 35.222440] Dumping ftrace buffer: [ 35.226046] (ftrace buffer empty) [ 35.229724] Kernel Offset: disabled [ 35.233352] Rebooting in 86400 seconds..