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WARNING: CPU: 1 PID: 44 at net/batman-adv/multicast.c:371 batadv_mcast_mla_tt_add net/batman-adv/multicast.c:371 [inline]
WARNING: CPU: 1 PID: 44 at net/batman-adv/multicast.c:371 __batadv_mcast_mla_update net/batman-adv/multicast.c:636 [inline]
WARNING: CPU: 1 PID: 44 at net/batman-adv/multicast.c:371 batadv_mcast_mla_update+0x1927/0x1ec0 net/batman-adv/multicast.c:661
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 44 Comm: kworker/u4:2 Not tainted 4.19.44 #16
kobject: 'loop3' (000000008e052fe2): kobject_uevent_env
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
kobject: 'loop3' (000000008e052fe2): fill_kobj_path: path = '/devices/virtual/block/loop3'
 panic+0x263/0x507 kernel/panic.c:185
 __warn.cold+0x20/0x4a kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:297
kobject: 'loop5' (000000001095a844): kobject_uevent_env
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:317
kobject: 'loop5' (000000001095a844): fill_kobj_path: path = '/devices/virtual/block/loop5'
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:997
RIP: 0010:batadv_mcast_mla_tt_add net/batman-adv/multicast.c:371 [inline]
RIP: 0010:__batadv_mcast_mla_update net/batman-adv/multicast.c:636 [inline]
RIP: 0010:batadv_mcast_mla_update+0x1927/0x1ec0 net/batman-adv/multicast.c:661
Code: 00 0f 85 95 05 00 00 4c 3b ad d0 fe ff ff 4c 89 ef 4d 8b 65 00 0f 85 a0 fb ff ff e8 63 9f 97 fa e9 a6 ef ff ff e8 59 9f 97 fa <0f> 0b e9 64 ec ff ff e8 4d 9f 97 fa 8b b5 a8 fe ff ff 31 ff e8 c0
RSP: 0018:ffff8880a98cfbc0 EFLAGS: 00010293
RAX: ffff8880a98c0400 RBX: 0000000000000001 RCX: ffffffff86d349d9
RDX: 0000000000000000 RSI: ffffffff86d35d77 RDI: 0000000000000007
RBP: ffff8880a98cfd30 R08: ffff8880a98c0400 R09: ffff8880a98c0cc8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a98cfc98
R13: ffff88809b53d510 R14: 0000000000000000 R15: ffff8880a98cfd08
 process_one_work+0x989/0x1750 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:413
Kernel Offset: disabled
Rebooting in 86400 seconds..