[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.815583] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.209049] random: sshd: uninitialized urandom read (32 bytes read) [ 17.513353] random: sshd: uninitialized urandom read (32 bytes read) [ 18.248703] random: sshd: uninitialized urandom read (32 bytes read) [ 18.394570] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. [ 23.870694] random: sshd: uninitialized urandom read (32 bytes read) [ 23.984310] IPVS: Creating netns size=2536 id=1 executing program [ 24.005662] IPVS: Creating netns size=2536 id=2 [ 24.017182] IPVS: Creating netns size=2536 id=3 executing program [ 24.049017] IPVS: Creating netns size=2536 id=4 executing program executing program [ 24.076956] IPVS: Creating netns size=2536 id=5 [ 24.110234] IPVS: Creating netns size=2536 id=6 [ 24.116273] ------------[ cut here ]------------ [ 24.116289] WARNING: CPU: 1 PID: 3825 at kernel/signal.c:343 task_participate_group_stop+0x220/0x2c0 [ 24.116293] Kernel panic - not syncing: panic_on_warn set ... [ 24.116293] [ 24.116300] CPU: 1 PID: 3825 Comm: 3 Not tainted 4.9.96-g71fce1e #13 [ 24.116304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.116316] ffff8801d8d07ab0 ffffffff81eb0b69 ffffffff83a484a0 00000000ffffffff [ 24.116325] 0000000000000000 0000000000000001 0000000000000157 ffff8801d8d07b70 [ 24.116334] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 24.116336] Call Trace: [ 24.116345] [] dump_stack+0xc1/0x128 [ 24.116353] [] panic+0x1bf/0x3bc [ 24.116360] [] ? add_taint.cold.6+0x16/0x16 [ 24.116369] [] ? do_execveat_common.isra.40+0x186b/0x1f30 [ 24.116376] [] ? SyS_execveat+0x55/0x70 [ 24.116384] [] ? entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.116391] [] ? __warn.cold.9+0xa6/0x17f [ 24.116398] [] ? task_participate_group_stop+0x220/0x2c0 [ 24.116405] [] __warn.cold.9+0xc1/0x17f [ 24.116413] [] warn_slowpath_null+0x2c/0x40 [ 24.116419] [] task_participate_group_stop+0x220/0x2c0 [ 24.116426] [] ? do_signal_stop+0x55c/0x7c0 [ 24.116433] [] do_signal_stop+0x373/0x7c0 [ 24.116440] [] get_signal+0x5b8/0x1450 [ 24.116449] [] do_signal+0x87/0x19f0 [ 24.116458] [] ? kmem_cache_free+0x294/0x310 [ 24.116468] [] ? put_files_struct+0x25/0x250 [ 24.116475] [] ? setup_sigcontext+0x7d0/0x7d0 [ 24.116482] [] ? do_execveat_common.isra.40+0x23e/0x1f30 [ 24.116490] [] ? do_execveat_common.isra.40+0x10cf/0x1f30 [ 24.116496] [] ? prepare_bprm_creds+0x110/0x110 [ 24.116502] [] ? getname_flags+0x23a/0x580 [ 24.116508] [] ? exit_to_usermode_loop+0xac/0x120 [ 24.116515] [] exit_to_usermode_loop+0xe1/0x120 [ 24.116521] [] do_syscall_64+0x364/0x490 [ 24.116528] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.117189] Dumping ftrace buffer: [ 24.117243] (ftrace buffer empty) [ 24.117246] Kernel Offset: disabled [ 24.349829] Rebooting in 86400 seconds..