Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
WARNING: CPU: 1 PID: 7680 at net/batman-adv/multicast.c:337 batadv_mcast_mla_tt_retract+0x309/0x3d0 net/batman-adv/multicast.c:337
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7680 Comm: kworker/u4:5 Not tainted 5.0.0+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_mcast_mla_update
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:batadv_mcast_mla_tt_retract+0x309/0x3d0 net/batman-adv/multicast.c:337
Code: 8d 47 86 fa 4c 8b 7d c0 4d 85 ff 0f 85 c3 fd ff ff e8 7b 47 86 fa 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 67 47 86 fa <0f> 0b e9 54 fd ff ff e8 5b e0 bd fa e9 37 fe ff ff 48 89 df e8 6e
RSP: 0018:ffff888067367b50 EFLAGS: 00010293
RAX: ffff8880aa362380 RBX: 0000000000000001 RCX: ffffffff86e96c5b
RDX: 0000000000000000 RSI: ffffffff86e96f09 RDI: 0000000000000007
RBP: ffff888067367bb0 R08: ffff8880aa362380 R09: 0000000000000003
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff888067367c98
R13: ffff88806e2549c8 R14: 0000000000000000 R15: ffff888067367d08
 __batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline]
 batadv_mcast_mla_update+0x553/0x1ec0 net/batman-adv/multicast.c:661
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173
 worker_thread+0x98/0xe40 kernel/workqueue.c:2319
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..