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: 7 Comm: kworker/u4:0 Not tainted 5.1.0-rc5+ #176
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:ffff8880aa25f9c8 EFLAGS: 00010207
RAX: 80a5074500000000 RBX: ffffe8ffffd65040 RCX: 0020000000000000
RDX: 00ffffffffffffff RSI: ffffffff858bb1da RDI: 0100000000000007
RBP: ffff8880aa25fa28 R08: ffff8880aa2521c0 R09: fffffbfff12656ed
R10: fffffbfff12656ec R11: ffffffff8932b763 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd65050 R15: ffffe8ffffd650bd
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001008 CR3: 000000006cfcf000 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 c46edd6a446e7203 ]---
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:ffff8880aa25f9c8 EFLAGS: 00010207
RAX: 80a5074500000000 RBX: ffffe8ffffd65040 RCX: 0020000000000000
RDX: 00ffffffffffffff RSI: ffffffff858bb1da RDI: 0100000000000007
RBP: ffff8880aa25fa28 R08: ffff8880aa2521c0 R09: fffffbfff12656ed
R10: fffffbfff12656ec R11: ffffffff8932b763 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd65050 R15: ffffe8ffffd650bd
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001008 CR3: 0000000098b4e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400