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: 7951 Comm: kworker/u4:8 Not tainted 5.1.0-rc4+ #169
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:1983 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1999 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2710 [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:ffff88808af0f9c8 EFLAGS: 00010202
RAX: b518000000000000 RBX: ffffe8ffffd6b3c0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff858be03a RDI: 0000000000000008
RBP: ffff88808af0fa28 R08: ffff88808aaca040 R09: fffffbfff126567d
R10: fffffbfff126567c R11: ffffffff8932b3e3 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd6b3d0 R15: ffffe8ffffd6b50a
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8899455330 CR3: 000000009971d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6gre_dev_free+0x19/0x60 net/ipv6/ip6_gre.c:1390
 netdev_run_todo+0x51c/0x7d0 net/core/dev.c:8986
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:116
 ip6gre_exit_batch_net+0x53a/0x750 net/ipv6/ip6_gre.c:1609
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace ecbc0fd1e8a3a1e2 ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1983 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1999 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2710 [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:ffff88808af0f9c8 EFLAGS: 00010202
RAX: b518000000000000 RBX: ffffe8ffffd6b3c0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff858be03a RDI: 0000000000000008
RBP: ffff88808af0fa28 R08: ffff88808aaca040 R09: fffffbfff126567d
R10: fffffbfff126567c R11: ffffffff8932b3e3 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd6b3d0 R15: ffffe8ffffd6b50a
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d2c000 CR3: 00000000854c6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400