[ 15.779498] random: sshd: uninitialized urandom read (32 bytes read, 32 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: [ 21.078443] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.386178] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.212657] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 33.273566] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. [ 38.678315] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) executing program [ 38.775861] ------------[ cut here ]------------ [ 38.780640] WARNING: CPU: 1 PID: 1 at kernel/signal.c:334 task_participate_group_stop+0x21d/0x2d0() [ 38.789871] Kernel panic - not syncing: panic_on_warn set ... [ 38.789871] [ 38.797202] CPU: 1 PID: 1 Comm: init Not tainted 4.4.107-g610c835 #12 [ 38.803746] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.813065] 0000000000000000 01bed9913c785f9c ffff8801da20fa38 ffffffff81d0457d [ 38.821023] ffffffff838429a0 ffff8801da20fb10 ffffffff838485e0 0000000000000009 [ 38.828974] 000000000000014e ffff8801da20fb00 ffffffff8141774a 0000000041b58ab3 [ 38.836929] Call Trace: [ 38.839485] [] dump_stack+0xc1/0x124 [ 38.844826] [] panic+0x1aa/0x388 [ 38.849818] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 38.856711] [] ? pm_qos_get_value.part.4+0xb/0xb [ 38.863083] [] ? warn_slowpath_common+0x10a/0x140 [ 38.869540] [] warn_slowpath_common+0x125/0x140 [ 38.875826] [] ? task_participate_group_stop+0x21d/0x2d0 [ 38.882900] [] warn_slowpath_null+0x29/0x30 [ 38.888850] [] task_participate_group_stop+0x21d/0x2d0 [ 38.895749] [] ? do_signal_stop+0x385/0x7a0 [ 38.901687] [] do_signal_stop+0x19b/0x7a0 [ 38.907449] [] get_signal+0x4c8/0x1660 [ 38.912958] [] do_signal+0x8b/0x1d40 [ 38.918292] [] ? __might_fault+0x18e/0x1d0 [ 38.924144] [] ? __might_fault+0xe4/0x1d0 [ 38.929908] [] ? setup_sigcontext+0x780/0x780 [ 38.936020] [] ? poll_schedule_timeout+0x1f0/0x1f0 [ 38.942575] [] ? kvm_clock_get_cycles+0x9/0x10 [ 38.948789] [] ? poll_select_set_timeout+0xa6/0x110 [ 38.955432] [] ? SyS_select+0x168/0x1d0 [ 38.961024] [] ? exit_to_usermode_loop+0xec/0x170 [ 38.967481] [] exit_to_usermode_loop+0x122/0x170 [ 38.973851] [] syscall_return_slowpath+0x1b5/0x1f0 [ 38.980394] [] int_ret_from_sys_call+0x25/0x9f [ 38.987034] Dumping ftrace buffer: [ 38.990611] (ftrace buffer empty) [ 38.994287] Kernel Offset: disabled [ 38.997920] Rebooting in 86400 seconds..