[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.164597] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.987250] random: sshd: uninitialized urandom read (32 bytes read) [ 16.186797] random: sshd: uninitialized urandom read (32 bytes read) [ 16.926241] random: sshd: uninitialized urandom read (32 bytes read) [ 17.060273] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 22.466863] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/28 22:02:52 parsed 1 programs 2018/04/28 22:02:52 executed programs: 0 [ 22.907858] IPVS: Creating netns size=2536 id=1 [ 26.565052] ------------[ cut here ]------------ [ 26.569863] WARNING: CPU: 1 PID: 3822 at kernel/signal.c:343 task_participate_group_stop+0x220/0x2c0 [ 26.579123] Kernel panic - not syncing: panic_on_warn set ... [ 26.579123] [ 26.586482] CPU: 1 PID: 3822 Comm: 3 Not tainted 4.9.96-g71fce1e #13 [ 26.592955] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.602293] ffff8801d8cf7aa0 ffffffff81eb0b69 ffffffff83a484a0 00000000ffffffff [ 26.610322] 0000000000000000 0000000000000001 0000000000000157 ffff8801d8cf7b60 [ 26.618358] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 26.626380] Call Trace: [ 26.628969] [] dump_stack+0xc1/0x128 [ 26.634323] [] panic+0x1bf/0x3bc [ 26.639325] [] ? add_taint.cold.6+0x16/0x16 [ 26.645283] [] ? do_execveat_common.isra.40+0x186b/0x1f30 [ 26.652459] [] ? compat_SyS_execveat+0x5b/0x70 [ 26.658672] [] ? entry_SYSENTER_compat+0x90/0xa2 [ 26.665065] [] ? __warn.cold.9+0xa6/0x17f [ 26.670844] [] ? task_participate_group_stop+0x220/0x2c0 [ 26.677927] [] __warn.cold.9+0xc1/0x17f [ 26.683540] [] warn_slowpath_null+0x2c/0x40 [ 26.689490] [] task_participate_group_stop+0x220/0x2c0 [ 26.696421] [] ? do_signal_stop+0x55c/0x7c0 [ 26.702382] [] do_signal_stop+0x373/0x7c0 [ 26.708175] [] get_signal+0x5b8/0x1450 [ 26.713698] [] do_signal+0x87/0x19f0 [ 26.719046] [] ? kmem_cache_free+0x294/0x310 [ 26.725087] [] ? put_files_struct+0x25/0x250 [ 26.731132] [] ? setup_sigcontext+0x7d0/0x7d0 [ 26.737272] [] ? do_execveat_common.isra.40+0x23e/0x1f30 [ 26.744369] [] ? do_execveat_common.isra.40+0x10cf/0x1f30 [ 26.751540] [] ? prepare_bprm_creds+0x110/0x110 [ 26.757853] [] ? getname_flags+0x23a/0x580 [ 26.763720] [] ? exit_to_usermode_loop+0xac/0x120 [ 26.770197] [] exit_to_usermode_loop+0xe1/0x120 [ 26.776500] [] do_fast_syscall_32+0x5c3/0x870 [ 26.782637] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.789296] [] entry_SYSENTER_compat+0x90/0xa2 [ 26.796154] Dumping ftrace buffer: [ 26.799763] (ftrace buffer empty) [ 26.803454] Kernel Offset: disabled [ 26.807087] Rebooting in 86400 seconds..