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: 10368 Comm: kworker/u4:5 Not tainted 5.2.0-rc5+ #32
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:1990 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2006 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2717 [inline]
RIP: 0010:gro_cells_destroy net/core/gro_cells.c:103 [inline]
RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:92
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:ffff888094d479a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffc7e7a0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8595ed4a RDI: 0000000000000008
RBP: ffff888094d47a08 R08: ffff8880773d61c0 R09: fffffbfff12a8e71
R10: fffffbfff12a8e70 R11: ffffffff89547383 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffe8ffffc7e7b0 R15: ffffe8ffffc7e7c3
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c422a12a00 CR3: 0000000079956000 CR4: 00000000001426e0
Call Trace:
 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:1000
 netdev_run_todo+0x48b/0x7c0 net/core/dev.c:8992
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 ip_tunnel_delete_nets+0x423/0x5f0 net/ipv4/ip_tunnel.c:1114
 ipgre_exit_batch_net+0x23/0x30 net/ipv4/ip_gre.c:993
 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 8dfe8232e7009f02 ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1990 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2006 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2717 [inline]
RIP: 0010:gro_cells_destroy net/core/gro_cells.c:103 [inline]
RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:92
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:ffff888094d479a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffc7e7a0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8595ed4a RDI: 0000000000000008
RBP: ffff888094d47a08 R08: ffff8880773d61c0 R09: fffffbfff12a8e71
R10: fffffbfff12a8e70 R11: ffffffff89547383 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffe8ffffc7e7b0 R15: ffffe8ffffc7e7c3
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000025d21a0 CR3: 0000000095389000 CR4: 00000000001426e0