kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8974 Comm: kworker/u4:7 Not tainted 5.0.0-rc7+ #88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__skb_unlink include/linux/skbuff.h:1929 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1945 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2656 [inline]
RIP: 0010:gro_cells_destroy net/core/gro_cells.c:89 [inline]
RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:78
Code: 03 42 80 3c 20 00 0f 85 53 01 00 00 48 8d 7a 08 49 8b 47 08 49 c7 07 00 00 00 00 48 89 f9 49 c7 47 08 00 00 00 00 48 c1 e9 03 <42> 80 3c 21 00 0f 85 10 01 00 00 48 89 c1 48 89 42 08 48 c1 e9 03
RSP: 0018:ffff8880941e79a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffc69758 RCX: 0000000000000001
kobject: 'loop1' (00000000934ac10e): kobject_uevent_env
RDX: 0000000000000000 RSI: ffffffff858417ba RDI: 0000000000000008
RBP: ffff8880941e7a08 R08: ffff888095b30200 R09: fffffbfff12636a5
R10: fffffbfff12636a4 R11: ffffffff8931b523 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffe8ffffc69768 R15: ffffe8ffffc6a61c
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
kobject: 'loop1' (00000000934ac10e): fill_kobj_path: path = '/devices/virtual/block/loop1'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2419792db8 CR3: 00000000a99f8000 CR4: 00000000001406f0
Call Trace:
 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:1010
 netdev_run_todo+0x51c/0x7d0 net/core/dev.c:8970
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:116
 ip_tunnel_delete_nets+0x423/0x5f0 net/ipv4/ip_tunnel.c:1124
 vti_exit_batch_net+0x23/0x30 net/ipv4/ip_vti.c:495
 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:
kobject: 'loop4' (000000009c6ee511): kobject_uevent_env
kobject: 'loop4' (000000009c6ee511): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000934ac10e): kobject_uevent_env
kobject: 'loop1' (00000000934ac10e): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000075d5fd62): kobject_uevent_env
kobject: 'loop0' (0000000075d5fd62): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000fac0a28b): kobject_uevent_env
net_ratelimit: 17337 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:f6:f4:18:93:2f:f2, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:f6:f4:18:93:2f:f2, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
kobject: 'loop3' (00000000fac0a28b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop3' (00000000fac0a28b): kobject_uevent_env
kobject: 'loop3' (00000000fac0a28b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000075d5fd62): kobject_uevent_env
kobject: 'loop0' (0000000075d5fd62): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000fac0a28b): kobject_uevent_env
kobject: 'loop3' (00000000fac0a28b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop3' (00000000fac0a28b): kobject_uevent_env
kobject: 'loop3' (00000000fac0a28b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (000000009c6ee511): kobject_uevent_env
kobject: 'loop4' (000000009c6ee511): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000cadff190): kobject_uevent_env
kobject: 'loop2' (00000000cadff190): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000cadff190): kobject_uevent_env
kobject: 'loop2' (00000000cadff190): fill_kobj_path: path = '/devices/virtual/block/loop2'
---[ end trace c121fc9d88e0f5d1 ]---
kobject: 'loop1' (00000000934ac10e): kobject_uevent_env
RIP: 0010:__skb_unlink include/linux/skbuff.h:1929 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1945 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2656 [inline]
RIP: 0010:gro_cells_destroy net/core/gro_cells.c:89 [inline]
RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:78
Code: 03 42 80 3c 20 00 0f 85 53 01 00 00 48 8d 7a 08 49 8b 47 08 49 c7 07 00 00 00 00 48 89 f9 49 c7 47 08 00 00 00 00 48 c1 e9 03 <42> 80 3c 21 00 0f 85 10 01 00 00 48 89 c1 48 89 42 08 48 c1 e9 03
kobject: 'loop1' (00000000934ac10e): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000075d5fd62): kobject_uevent_env
RSP: 0018:ffff8880941e79a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffc69758 RCX: 0000000000000001
kobject: 'loop0' (0000000075d5fd62): fill_kobj_path: path = '/devices/virtual/block/loop0'
RDX: 0000000000000000 RSI: ffffffff858417ba RDI: 0000000000000008
RBP: ffff8880941e7a08 R08: ffff888095b30200 R09: fffffbfff12636a5
kobject: 'loop4' (000000009c6ee511): kobject_uevent_env
kobject: 'loop4' (000000009c6ee511): fill_kobj_path: path = '/devices/virtual/block/loop4'
R10: fffffbfff12636a4 R11: ffffffff8931b523 R12: dffffc0000000000
kobject: 'loop2' (00000000cadff190): kobject_uevent_env
R13: 0000000000000000 R14: ffffe8ffffc69768 R15: ffffe8ffffc6a61c
kobject: 'loop2' (00000000cadff190): fill_kobj_path: path = '/devices/virtual/block/loop2'
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
kobject: 'loop2' (00000000cadff190): kobject_uevent_env
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a50489 CR3: 0000000096ff6000 CR4: 00000000001406f0
kobject: 'loop2' (00000000cadff190): fill_kobj_path: path = '/devices/virtual/block/loop2'