Buffer I/O error on dev loop1p1, logical block 1, async page read
Buffer I/O error on dev loop1p3, logical block 0, async page read
Buffer I/O error on dev loop1p3, logical block 1, async page read
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: 14198 Comm: kworker/u4:11 Not tainted 4.20.0+ #11
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+0x5c9/0x7f0 net/ipv6/ip6_fib.c:960
Code: 0f b6 3d 19 69 86 03 31 ff 44 89 fe e8 80 63 b0 fa 45 84 ff 0f 84 e3 00 00 00 e8 32 62 b0 fa 49 8d 7e 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 b8 01 00 00 48 8d 45 98 4d 8b 7e 70 48 89 c2 48
RSP: 0018:ffff8880550a6538 EFLAGS: 00010207
RAX: 0000000000001653 RBX: dffffc0000000000 RCX: ffffffff86d19762
RDX: 0000000000000000 RSI: ffffffff86d1965e RDI: 000000000000b29c
RBP: ffff8880550a6638 R08: ffff888054e58000 R09: ffffed100a1d7096
R10: ffffed100a1d7095 R11: ffff888050eb84af R12: 0000000000000001
R13: ffff888050eb8480 R14: 000000000000b22c R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001d95e88 CR3: 000000005c9cf000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fib6_del_route net/ipv6/ip6_fib.c:1813 [inline]
 fib6_del+0xbdb/0x12e0 net/ipv6/ip6_fib.c:1844
 fib6_clean_node+0x453/0x660 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+0x22a/0x340 net/ipv6/ip6_fib.c:2055
 __fib6_clean_all+0x216/0x430 net/ipv6/ip6_fib.c:2071
 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2082
 rt6_sync_down_dev+0x17e/0x1b0 net/ipv6/route.c:4041
 rt6_disable_ip+0x80/0x730 net/ipv6/route.c:4046
 addrconf_ifdown+0x13e/0x15e0 net/ipv6/addrconf.c:3669
 addrconf_notify+0x629/0x25f0 net/ipv6/addrconf.c:3594
 notifier_call_chain+0x179/0x380 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+0x42e/0x890 net/core/dev.c:1508
 rollback_registered_many+0x544/0x1370 net/core/dev.c:8079
 unregister_netdevice_many.part.0+0x8e/0x470 net/core/dev.c:9207
 unregister_netdevice_many+0xba/0x120 net/core/dev.c:9206
 sit_exit_batch_net+0x5f1/0x830 net/ipv6/sit.c:1888
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 0f7471aa053153ea ]---
RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline]
RIP: 0010:fib6_purge_rt+0x5c9/0x7f0 net/ipv6/ip6_fib.c:960
Code: 0f b6 3d 19 69 86 03 31 ff 44 89 fe e8 80 63 b0 fa 45 84 ff 0f 84 e3 00 00 00 e8 32 62 b0 fa 49 8d 7e 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 b8 01 00 00 48 8d 45 98 4d 8b 7e 70 48 89 c2 48
RSP: 0018:ffff8880550a6538 EFLAGS: 00010207
RAX: 0000000000001653 RBX: dffffc0000000000 RCX: ffffffff86d19762
RDX: 0000000000000000 RSI: ffffffff86d1965e RDI: 000000000000b29c
RBP: ffff8880550a6638 R08: ffff888054e58000 R09: ffffed100a1d7096
R10: ffffed100a1d7095 R11: ffff888050eb84af R12: 0000000000000001
R13: ffff888050eb8480 R14: 000000000000b22c R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001d95e88 CR3: 000000005c9cf000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400