IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6624 at kernel/signal.c:343 task_participate_group_stop+0x219/0x2c0 kernel/signal.c:343()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6624 Comm: 3 Not tainted 4.4.129-g23eaecc #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 6d8739f7078ef2ea ffff8801ca837af8 ffffffff81e0dc8d
 ffffffff83a43ec0 ffff8800afbfe000 ffffffff83a49b00 0000000000000009
 0000000000000157 ffff8801ca837bb8 ffffffff81409ed4 0000000041b58ab3
Call Trace:
 [<ffffffff81e0dc8d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0dc8d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81409ed4>] panic+0x19e/0x38d kernel/panic.c:112
 [<ffffffff8140a0f8>] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455
 [<ffffffff81130049>] warn_slowpath_null+0x29/0x30 kernel/panic.c:492
 [<ffffffff81155269>] task_participate_group_stop+0x219/0x2c0 kernel/signal.c:343
 [<ffffffff81159b3f>] do_signal_stop+0x36f/0x7c0 kernel/signal.c:2024
 [<ffffffff8115e54e>] get_signal+0x5de/0x14b0 kernel/signal.c:2201
 [<ffffffff8100e02b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6665 at kernel/signal.c:343 task_participate_group_stop+0x219/0x2c0 kernel/signal.c:343()
Modules linked in:
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:348
 [<ffffffff838bf275>] int_ret_from_sys_call+0x25/0xa3
CPU: 0 PID: 6665 Comm: 3 Not tainted 4.4.129-g23eaecc #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 47aed0e0b8e8c3b4 ffff8801d4b5fbb8 ffffffff81e0dc8d
 0000000000000000 ffff8801ce39b000 ffffffff83a49b00 0000000000000009
 0000000000000157 ffff8801d4b5fbf8 ffffffff8112fded ffffffff81155269
Call Trace:
 [<ffffffff81e0dc8d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0dc8d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8112fded>] warn_slowpath_common+0xdd/0x120 kernel/panic.c:459
 [<ffffffff81130049>] warn_slowpath_null+0x29/0x30 kernel/panic.c:492
 [<ffffffff81155269>] task_participate_group_stop+0x219/0x2c0 kernel/signal.c:343
 [<ffffffff81159b3f>] do_signal_stop+0x36f/0x7c0 kernel/signal.c:2024
 [<ffffffff8115e54e>] get_signal+0x5de/0x14b0 kernel/signal.c:2201
 [<ffffffff8100e02b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:348
 [<ffffffff838bf275>] int_ret_from_sys_call+0x25/0xa3
---[ end trace 866e01667dad291f ]---
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..