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: 0 PID: 130 Comm: kworker/u4:3 Not tainted 5.1.0-rc2+ #117
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:921 [inline]
RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:957
Code: 0f b6 35 26 37 42 03 31 ff 44 89 f6 e8 d6 ef 57 fb 45 84 f6 0f 84 b3 00 00 00 e8 88 ee 57 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80
RSP: 0018:ffff8880a941f0f8 EFLAGS: 00010202
RAX: 0000000000000010 RBX: dffffc0000000000 RCX: ffffffff861883c9
RDX: 0000000000000000 RSI: ffffffff861882f8 RDI: 0000000000000082
RBP: ffff8880a941f150 R08: ffff8880a940c400 R09: ffffed1012cecabe
R10: ffffed1012cecabd R11: ffff8880967655ef R12: 0000000000000001
R13: ffff8880967655c0 R14: 0000000000000001 R15: 0000000000000012
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002762978 CR3: 0000000072a6e000 CR4: 00000000001406f0
Call Trace:
 fib6_del_route net/ipv6/ip6_fib.c:1810 [inline]
 fib6_del+0xac2/0x10a0 net/ipv6/ip6_fib.c:1841
 fib6_clean_node+0x3a8/0x590 net/ipv6/ip6_fib.c:2003
 fib6_walk_continue+0x495/0x900 net/ipv6/ip6_fib.c:1925
 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1973
 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2052
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2068
 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2079
 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4070
 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4075
 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3707
 addrconf_notify+0x19a/0x2260 net/ipv6/addrconf.c:3632
 notifier_call_chain+0xc7/0x240 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1740
 call_netdevice_notifiers_extack net/core/dev.c:1752 [inline]
 call_netdevice_notifiers net/core/dev.c:1766 [inline]
 dev_close_many+0x33f/0x6f0 net/core/dev.c:1509
 rollback_registered_many+0x43b/0xfd0 net/core/dev.c:8173
 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9304
 unregister_netdevice_many+0x3b/0x50 net/core/dev.c:9303
 sit_exit_batch_net+0x560/0x750 net/ipv6/sit.c:1891
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:551
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 6268ae35565d0c85 ]---
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:921 [inline]
RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:957
Code: 0f b6 35 26 37 42 03 31 ff 44 89 f6 e8 d6 ef 57 fb 45 84 f6 0f 84 b3 00 00 00 e8 88 ee 57 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80
RSP: 0018:ffff8880a941f0f8 EFLAGS: 00010202
RAX: 0000000000000010 RBX: dffffc0000000000 RCX: ffffffff861883c9
RDX: 0000000000000000 RSI: ffffffff861882f8 RDI: 0000000000000082
RBP: ffff8880a941f150 R08: ffff8880a940c400 R09: ffffed1012cecabe
R10: ffffed1012cecabd R11: ffff8880967655ef R12: 0000000000000001
R13: ffff8880967655c0 R14: 0000000000000001 R15: 0000000000000012
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002762978 CR3: 0000000072a6e000 CR4: 00000000001406f0