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: 308 Comm: kworker/u4:3 Not tainted 5.0.0-rc7+ #83
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:1924 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1941 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2655 [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: 'loop0' (00000000d3a4e468): 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: 'loop0' (00000000d3a4e468): fill_kobj_path: path = '/devices/virtual/block/loop0'
RSP: 0018:ffff8880a90479a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffd71980 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8582a9ea RDI: 0000000000000008
RBP: ffff8880a9047a08 R08: ffff8880a903e4c0 R09: fffffbfff12633e5
R10: fffffbfff12633e4 R11: ffffffff89319f23 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd71990 R15: ffffe8ffffd71997
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf59f6aa8 CR3: 00000000a7c22000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:966
 netdev_run_todo+0x51c/0x7d0 net/core/dev.c:8888
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117
 ip_tunnel_delete_nets+0x423/0x5f0 net/ipv4/ip_tunnel.c:1080
 ipgre_exit_batch_net+0x23/0x30 net/ipv4/ip_gre.c:1067
 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: 'loop5' (0000000099a01981): kobject_uevent_env
---[ end trace 66eaa0ec3776fdc8 ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1924 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1941 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2655 [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: 'loop5' (0000000099a01981): fill_kobj_path: path = '/devices/virtual/block/loop5'
RSP: 0018:ffff8880a90479a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffd71980 RCX: 0000000000000001
kobject: 'loop2' (000000002517eeaf): kobject_uevent_env
RDX: 0000000000000000 RSI: ffffffff8582a9ea RDI: 0000000000000008
kobject: 'loop2' (000000002517eeaf): fill_kobj_path: path = '/devices/virtual/block/loop2'
RBP: ffff8880a9047a08 R08: ffff8880a903e4c0 R09: fffffbfff12633e5
R10: fffffbfff12633e4 R11: ffffffff89319f23 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd71990 R15: ffffe8ffffd71997
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f00b1f62000 CR3: 00000000a7c22000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400