------------[ cut here ]------------
kobject: 'loop2' (ffff8880a49bc9a0): kobject_uevent_env
WARNING: CPU: 1 PID: 2239 at net/batman-adv/multicast.c:315 batadv_mcast_mla_tt_add net/batman-adv/multicast.c:315 [inline]
WARNING: CPU: 1 PID: 2239 at net/batman-adv/multicast.c:315 __batadv_mcast_mla_update net/batman-adv/multicast.c:578 [inline]
WARNING: CPU: 1 PID: 2239 at net/batman-adv/multicast.c:315 batadv_mcast_mla_update+0x1599/0x1b00 net/batman-adv/multicast.c:603
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2239 Comm: kworker/u4:4 Not tainted 4.14.113 #3
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:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x438 kernel/panic.c:182
kobject: 'loop2' (ffff8880a49bc9a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 __warn.cold+0x2f/0x34 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944
RIP: 0010:batadv_mcast_mla_tt_add net/batman-adv/multicast.c:315 [inline]
RIP: 0010:__batadv_mcast_mla_update net/batman-adv/multicast.c:578 [inline]
RIP: 0010:batadv_mcast_mla_update+0x1599/0x1b00 net/batman-adv/multicast.c:603
RSP: 0018:ffff8880a1e3fbf8 EFLAGS: 00010297
RAX: ffff8880a1e32500 RBX: ffff8880a1e3fcf0 RCX: 1ffff110143c65b9
RDX: 0000000000000000 RSI: ffff8880a1e32da8 RDI: 0000000000000286
RBP: ffff8880a1e3fd38 R08: 000000005097db3f R09: ffff8880a1e32dc8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a1e3fcf0
R13: ffff888067c98900 R14: ffff888067c99984 R15: ffff8880a1e3fd10
kobject: 'loop5' (ffff8880a4aae260): kobject_uevent_env
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Kernel Offset: disabled
Rebooting in 86400 seconds..