kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 12421 Comm: kworker/1:9 Not tainted 5.2.0-rc3+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events iterate_cleanup_work
RIP: 0010:dst_dev_put+0x24/0x280 net/core/dst.c:156
Code: 90 90 90 90 90 90 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb e8 4d 78 eb fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 e1 01 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffff8880ae909cc8 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 00000000000055a4 RCX: 1ffffffff1301d66
RDX: 0000000000000ab4 RSI: ffffffff85852fb3 RDI: 00000000000055a4
RBP: ffff8880ae909ce8 R08: ffff8880632b2600 R09: ffff8880632b2ec8
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000007 R14: 00000000000055a4 R15: 0000607f5146a848
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01fdf05000 CR3: 0000000094f64000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus.part.0+0xdb/0x130 net/ipv4/fib_semantics.c:202
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:194 [inline]
 fib_nh_common_release+0x107/0x280 net/ipv4/fib_semantics.c:215
 fib6_nh_release+0x299/0x3a0 net/ipv6/route.c:3487
 fib6_info_destroy_rcu+0x11e/0x160 net/ipv6/ip6_fib.c:174
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2092 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2310 [inline]
 rcu_core+0xba5/0x1500 kernel/rcu/tree.c:2291
 __do_softirq+0x25c/0x94c kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:374 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:414
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline]
RIP: 0010:lock_is_held_type+0x272/0x320 kernel/locking/lockdep.c:4343
Code: ff df c7 83 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 88 00 00 00 48 83 3d 26 b2 5b 07 00 74 31 48 8b 7d c0 57 9d <0f> 1f 44 00 00 48 83 c4 20 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d
RSP: 0018:ffff8880973efb48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1164e7e RBX: ffff8880632b2600 RCX: ffff8880632b2e80
RDX: dffffc0000000000 RSI: ffffffff88ba3540 RDI: 0000000000000286
RBP: ffff8880973efb90 R08: ffff8880632b2600 R09: ffff8880632b2ec8
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880632b2ea8 R14: ffffffff88ba3540 R15: 0000000000000002
 lock_is_held include/linux/lockdep.h:356 [inline]
 ___might_sleep+0x201/0x280 kernel/sched/core.c:6103
 get_next_corpse net/netfilter/nf_conntrack_core.c:2019 [inline]
 nf_ct_iterate_cleanup+0x22a/0x4e0 net/netfilter/nf_conntrack_core.c:2041
 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2126 [inline]
 nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2111
 iterate_cleanup_work+0x4a/0xd7 net/netfilter/nf_nat_masquerade.c:216
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace c136dae8a1ff40cd ]---
RIP: 0010:dst_dev_put+0x24/0x280 net/core/dst.c:156
Code: 90 90 90 90 90 90 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb e8 4d 78 eb fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 e1 01 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffff8880ae909cc8 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 00000000000055a4 RCX: 1ffffffff1301d66
RDX: 0000000000000ab4 RSI: ffffffff85852fb3 RDI: 00000000000055a4
RBP: ffff8880ae909ce8 R08: ffff8880632b2600 R09: ffff8880632b2ec8
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000007 R14: 00000000000055a4 R15: 0000607f5146a848
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01fdf05000 CR3: 0000000094f64000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400