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: 3069 Comm: kworker/u4:5 Not tainted 5.2.0-rc2+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline]
RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:899 [inline]
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:920 [inline]
RIP: 0010:fib6_purge_rt+0x1a0/0x630 net/ipv6/ip6_fib.c:928
Code: c1 ea 03 42 80 3c 32 00 0f 85 1d 04 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 cb 8c 4d fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 0b 04 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff
RSP: 0018:ffff88809e097160 EFLAGS: 00010207
RAX: ffff88809e682640 RBX: ffff888089084780 RCX: 1ffffffff10ea44d
RDX: 0000000000000750 RSI: ffffffff862318f5 RDI: 0000000000003a84
RBP: ffff88809e0971c8 R08: ffff88809e682640 R09: ffffed1013c12e13
R10: ffffed1013c12e12 R11: 0000000000000003 R12: 0000000000000001
R13: ffff888069baf700 R14: dffffc0000000000 R15: 0000000000003a14
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000178ffd0 CR3: 0000000090132000 CR4: 00000000001406f0
Call Trace:
 fib6_del_route net/ipv6/ip6_fib.c:1811 [inline]
 fib6_del+0x9bd/0xeb0 net/ipv6/ip6_fib.c:1842
 fib6_clean_node+0x3a5/0x590 net/ipv6/ip6_fib.c:2004
 fib6_walk_continue+0x4a9/0x8e0 net/ipv6/ip6_fib.c:1926
 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1974
 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2053
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2069
 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2080
 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4284
 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4289
 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3707
 addrconf_notify+0x5db/0x2370 net/ipv6/addrconf.c:3632
 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95
 __raw_notifier_call_chain kernel/notifier.c:396 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1753
 call_netdevice_notifiers_extack net/core/dev.c:1765 [inline]
 call_netdevice_notifiers net/core/dev.c:1779 [inline]
 dev_close_many+0x33f/0x6f0 net/core/dev.c:1522
 rollback_registered_many+0x43b/0xfc0 net/core/dev.c:8159
 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9290
 unregister_netdevice_many+0x3b/0x50 net/core/dev.c:9289
 vti6_exit_batch_net+0x467/0x690 net/ipv6/ip6_vti.c:1152
 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:157
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:553
 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 f6c0b440c8d20a54 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline]
RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:899 [inline]
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:920 [inline]
RIP: 0010:fib6_purge_rt+0x1a0/0x630 net/ipv6/ip6_fib.c:928
Code: c1 ea 03 42 80 3c 32 00 0f 85 1d 04 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 cb 8c 4d fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 0b 04 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff
RSP: 0018:ffff88809e097160 EFLAGS: 00010207
RAX: ffff88809e682640 RBX: ffff888089084780 RCX: 1ffffffff10ea44d
RDX: 0000000000000750 RSI: ffffffff862318f5 RDI: 0000000000003a84
RBP: ffff88809e0971c8 R08: ffff88809e682640 R09: ffffed1013c12e13
R10: ffffed1013c12e12 R11: 0000000000000003 R12: 0000000000000001
R13: ffff888069baf700 R14: dffffc0000000000 R15: 0000000000003a14
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000178ffd0 CR3: 0000000090132000 CR4: 00000000001406f0