IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
WARNING: CPU: 0 PID: 7811 at net/ipv4/tcp_output.c:2535 tcp_send_loss_probe+0x771/0x8a0 net/ipv4/tcp_output.c:2535
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7811 Comm: kworker/0:3 Not tainted 5.0.0-rc7+ #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events iterate_cleanup_work
Call Trace:
 <IRQ>
 __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:tcp_send_loss_probe+0x771/0x8a0 net/ipv4/tcp_output.c:2535
Code: 88 fc ff ff 4c 89 ef e8 ed 61 c9 fb e9 c8 fc ff ff e8 43 62 c9 fb e9 63 fd ff ff e8 d9 61 c9 fb e9 94 f9 ff ff e8 5f 61 92 fb <0f> 0b e9 7d fa ff ff e8 53 61 92 fb 0f b6 1d 3a 5d 7b 03 31 ff 89
RSP: 0018:ffff8880ae807c68 EFLAGS: 00010206
RAX: ffff8880a0c48300 RBX: 0000000000000000 RCX: ffffffff85dd7b4b
RDX: 0000000000000100 RSI: ffffffff85dd8021 RDI: 0000000000000005
RBP: ffff8880ae807c98 R08: ffff8880a0c48300 R09: ffffed1011cd0339
R10: ffffed1011cd0338 R11: ffff88808e6819c3 R12: ffff88808c510040
R13: ffff88808e681800 R14: 0000000000008000 R15: ffff88808c510850
 tcp_write_timer_handler+0x4f8/0x8e0 net/ipv4/tcp_timer.c:596
 tcp_write_timer+0x10e/0x1d0 net/ipv4/tcp_timer.c:620
 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers kernel/time/timer.c:1681 [inline]
 __run_timers kernel/time/timer.c:1649 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
 __do_softirq+0x266/0x95a kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:lock_is_held_type+0x50/0x210 kernel/locking/lockdep.c:3872
Code: 48 83 ec 08 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 61 01 00 00 8b 83 7c 08 00 00 <85> c0 0f 85 39 01 00 00 48 c7 c0 e8 82 92 88 48 ba 00 00 00 00 00
RSP: 0018:ffff8880979ffb70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff8880a0c48300 RCX: 1ffffffff12b9587
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880a0c48b7c
RBP: ffff8880979ffb90 R08: ffff8880a0c48300 R09: ffff8880a0c48bc8
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff889a42c0
R13: 0000000000000775 R14: 0000000000000001 R15: dffffc0000000000
 lock_is_held include/linux/lockdep.h:337 [inline]
 ___might_sleep+0x201/0x280 kernel/sched/core.c:6126
 get_next_corpse net/netfilter/nf_conntrack_core.c:1909 [inline]
 nf_ct_iterate_cleanup+0x22a/0x4e0 net/netfilter/nf_conntrack_core.c:1931
 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2016 [inline]
 nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2001
 iterate_cleanup_work+0x4a/0xe0 net/ipv6/netfilter/nf_nat_masquerade_ipv6.c:113
 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..