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WARNING: CPU: 1 PID: 2257 at kernel/signal.c:343 task_participate_group_stop+0x21f/0x2d0 kernel/signal.c:343()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2257 Comm: 5 Not tainted 4.4.174+ #4
 0000000000000000 40758184e5514ed0 ffff8800b517fa60 ffffffff81aad1a1
 0000000000000000 ffffffff82835ee0 ffffffff8283bd40 0000000000000157
 ffffffff810f7f3f ffff8800b517fb40 ffffffff813a48c2 0000000041b58ab3
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813a48c2>] panic+0x1b9/0x37b kernel/panic.c:112
 [<ffffffff813a4ab9>] warn_slowpath_common kernel/panic.c:455 [inline]
 [<ffffffff813a4ab9>] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435
 [<ffffffff810d3aaa>] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492
 [<ffffffff810f7f3f>] task_participate_group_stop+0x21f/0x2d0 kernel/signal.c:343
 [<ffffffff810fca32>] do_signal_stop+0x3a2/0x810 kernel/signal.c:2028
 [<ffffffff81100b79>] get_signal+0x5f9/0x1570 kernel/signal.c:2205
 [<ffffffff8100bd4c>] do_signal+0x9c/0x1840 arch/x86/kernel/signal.c:712
 [<ffffffff81003da7>] exit_to_usermode_loop+0x127/0x170 arch/x86/entry/common.c:184
 [<ffffffff8100569b>] prepare_exit_to_usermode arch/x86/entry/common.c:221 [inline]
 [<ffffffff8100569b>] syscall_return_slowpath+0x25b/0x2e0 arch/x86/entry/common.c:286
 [<ffffffff82718ce1>] int_ret_from_sys_call+0x25/0xa3
Kernel Offset: disabled
Rebooting in 86400 seconds..