[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.682821] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.284577] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.632322] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.356261] random: sshd: uninitialized urandom read (32 bytes read, 77 bits of entropy available) [ 21.531455] random: sshd: uninitialized urandom read (32 bytes read, 83 bits of entropy available) Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. [ 26.928145] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available) executing program [ 27.033430] ------------[ cut here ]------------ [ 27.038222] WARNING: CPU: 1 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 27.047459] Kernel panic - not syncing: panic_on_warn set ... [ 27.047459] [ 27.054793] CPU: 1 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #12 [ 27.061347] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.070678] 0000000000000000 cea19db8524ac313 ffff8801da20fa38 ffffffff81d0457d [ 27.078626] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 27.086590] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 27.095057] Call Trace: [ 27.097611] [] dump_stack+0xc1/0x124 [ 27.102940] [] panic+0x1aa/0x388 [ 27.107921] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 27.114817] [] ? pm_qos_get_value.part.4+0xb/0xb [ 27.122417] [] ? warn_slowpath_common+0x10a/0x140 [ 27.128887] [] warn_slowpath_common+0x125/0x140 [ 27.135181] [] ? task_participate_group_stop+0x21d/0x2d0 [ 27.142269] [] warn_slowpath_null+0x29/0x30 [ 27.148211] [] task_participate_group_stop+0x21d/0x2d0 [ 27.155100] [] ? do_signal_stop+0x385/0x7a0 [ 27.161047] [] do_signal_stop+0x19b/0x7a0 [ 27.166811] [] get_signal+0x4c8/0x1660 [ 27.172313] [] do_signal+0x8b/0x1d40 [ 27.177642] [] ? __might_fault+0x18e/0x1d0 [ 27.183491] [] ? __might_fault+0xe4/0x1d0 [ 27.189260] [] ? setup_sigcontext+0x780/0x780 [ 27.195370] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 27.201928] [] ? kvm_clock_get_cycles+0x9/0x10 [ 27.208136] [] ? poll_select_set_timeout+0xa6/0x110 [ 27.214772] [] ? SyS_select+0x168/0x1d0 [ 27.220366] [] ? exit_to_usermode_loop+0xec/0x170 [ 27.226826] [] exit_to_usermode_loop+0x122/0x170 [ 27.233196] [] syscall_return_slowpath+0x1b5/0x1f0 [ 27.239740] [] int_ret_from_sys_call+0x25/0x9f [ 27.246430] Dumping ftrace buffer: [ 27.250009] (ftrace buffer empty) [ 27.253692] Kernel Offset: disabled [ 27.257320] Rebooting in 86400 seconds..