bridge0: port 4(gretap0) entered blocking state
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
bridge0: port 4(gretap0) entered disabled state
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7816 Comm: kworker/u4:6 Not tainted 5.0.0+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'brport' (0000000075dcf782): kobject_add_internal: parent: 'gretap0', set: '<NULL>'
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:ffff888065fcf9a8 EFLAGS: 00010203
RAX: ffd653c000000000 RBX: ffffe8ffffd652b8 RCX: 000000001ffffd20
RDX: 00000000ffffe8ff RSI: ffffffff858410ca RDI: 00000000ffffe907
RBP: ffff888065fcfa08 R08: ffff88808ee96540 R09: fffffbfff1263645
R10: fffffbfff1263644 R11: ffffffff8931b223 R12: dffffc0000000000
device gretap0 entered promiscuous mode
R13: 0000000000000001 R14: ffffe8ffffd652c8 R15: ffffe8ffffd653b4
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcfda1cec0 CR3: 0000000089e4b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bridge0: port 4(gretap0) entered blocking state
 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:1010
 netdev_run_todo+0x51c/0x7d0 net/core/dev.c:8970
bridge0: port 4(gretap0) entered forwarding state
kobject: 'loop2' (00000000db5bd0ad): kobject_uevent_env
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:116
kobject: 'loop2' (00000000db5bd0ad): fill_kobj_path: path = '/devices/virtual/block/loop2'
 ip_tunnel_delete_nets+0x423/0x5f0 net/ipv4/ip_tunnel.c:1124
kobject: 'brport' (0000000075dcf782): kobject_uevent_env
 ipip_exit_batch_net+0x23/0x30 net/ipv4/ipip.c:663
 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
kobject: 'brport' (0000000075dcf782): kobject_uevent_env: filter function caused the event to drop!
 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
kobject: 'regulatory.0' (0000000004a00879): kobject_uevent_env
Modules linked in:
---[ end trace 0cd979d23e272903 ]---
kobject: 'loop3' (000000007b2989bd): kobject_uevent_env
kobject: 'loop3' (000000007b2989bd): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'regulatory.0' (0000000004a00879): fill_kobj_path: path = '/devices/platform/regulatory.0'
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
kobject: 'loop4' (0000000097e6eead): kobject_uevent_env
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: 'loop4' (0000000097e6eead): fill_kobj_path: path = '/devices/virtual/block/loop4'
RSP: 0018:ffff888065fcf9a8 EFLAGS: 00010203
kobject: 'loop5' (0000000008aee808): kobject_uevent_env
RAX: ffd653c000000000 RBX: ffffe8ffffd652b8 RCX: 000000001ffffd20
kobject: 'loop5' (0000000008aee808): fill_kobj_path: path = '/devices/virtual/block/loop5'
RDX: 00000000ffffe8ff RSI: ffffffff858410ca RDI: 00000000ffffe907
RBP: ffff888065fcfa08 R08: ffff88808ee96540 R09: fffffbfff1263645
R10: fffffbfff1263644 R11: ffffffff8931b223 R12: dffffc0000000000
kobject: 'loop4' (0000000097e6eead): kobject_uevent_env
R13: 0000000000000001 R14: ffffe8ffffd652c8 R15: ffffe8ffffd653b4
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000245b7d0 CR3: 00000000a5527000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop4' (0000000097e6eead): fill_kobj_path: path = '/devices/virtual/block/loop4'