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: 29 Comm: kworker/u4:2 Not tainted 5.0.0+ #97
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:924 [inline]
RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960
Code: 0f b6 35 e7 bb 4a 03 31 ff 44 89 f6 e8 56 5a 61 fb 45 84 f6 0f 84 b3 00 00 00 e8 08 59 61 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:ffff8880a98870b8 EFLAGS: 00010207
RAX: 00000000000033db RBX: dffffc0000000000 RCX: ffffffff860e5e39
RDX: 0000000000000000 RSI: ffffffff860e5d68 RDI: 0000000000019edc
RBP: ffff8880a9887110 R08: ffff8880a9878040 R09: ffffed1011543856
R10: ffffed1011543855 R11: ffff88808aa1c2af R12: 0000000000000001
R13: ffff88808aa1c280 R14: 0000000000000001 R15: 0000000000019e6c
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5b602efc CR3: 0000000090cce000 CR4: 00000000001406f0
Call Trace:
 fib6_del_route net/ipv6/ip6_fib.c:1813 [inline]
 fib6_del+0xac2/0x10a0 net/ipv6/ip6_fib.c:1844
 fib6_clean_node+0x3a8/0x590 net/ipv6/ip6_fib.c:2006
 fib6_walk_continue+0x4b3/0x8e0 net/ipv6/ip6_fib.c:1928
 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1976
 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2055
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2071
 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2082
 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4051
 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4056
 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3705
 addrconf_notify+0x5e1/0x2280 net/ipv6/addrconf.c:3630
 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:1739
 call_netdevice_notifiers_extack net/core/dev.c:1751 [inline]
 call_netdevice_notifiers net/core/dev.c:1765 [inline]
 dev_close_many+0x33f/0x6f0 net/core/dev.c:1508
 rollback_registered_many+0x43b/0xfd0 net/core/dev.c:8161
 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9292
 unregister_netdevice_many net/core/dev.c:9291 [inline]
 default_device_exit_batch+0x350/0x410 net/core/dev.c:9761
 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: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
Modules linked in:
---[ end trace 3461673a5b5c7409 ]---
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline]
RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960
Code: 0f b6 35 e7 bb 4a 03 31 ff 44 89 f6 e8 56 5a 61 fb 45 84 f6 0f 84 b3 00 00 00 e8 08 59 61 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:ffff8880a98870b8 EFLAGS: 00010207
RAX: 00000000000033db RBX: dffffc0000000000 RCX: ffffffff860e5e39
RDX: 0000000000000000 RSI: ffffffff860e5d68 RDI: 0000000000019edc
RBP: ffff8880a9887110 R08: ffff8880a9878040 R09: ffffed1011543856
R10: ffffed1011543855 R11: ffff88808aa1c2af R12: 0000000000000001
R13: ffff88808aa1c280 R14: 0000000000000001 R15: 0000000000019e6c
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5b602efc CR3: 0000000090cce000 CR4: 00000000001406f0