Disabling bearer <udp:syz2>
Left network mode
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: 21 Comm: kworker/u4:1 Not tainted 5.2.0-rc3+ #22
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:1991 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2007 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2718 [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: 0000:ffff8880a9a179a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffd70aa0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8596095a RDI: 0000000000000008
RBP: ffff8880a9a17a08 R08: ffff8880a9a08580 R09: fffffbfff12a8e51
R10: fffffbfff12a8e50 R11: ffffffff89547283 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd70ab0 R15: ffffe8ffffd70c64
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c424f01010 CR3: 0000000090472000 CR4: 00000000001406f0
Call Trace:
 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:1013
 netdev_run_todo+0x48b/0x7c0 net/core/dev.c:8964
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 ip_tunnel_delete_nets+0x423/0x5f0 net/ipv4/ip_tunnel.c:1127
 ipgre_tap_exit_batch_net+0x23/0x30 net/ipv4/ip_gre.c:1577
 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 9cc09b4b3cfdb90e ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1991 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2007 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2718 [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: 0000:ffff8880a9a179a8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffd70aa0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8596095a RDI: 0000000000000008
RBP: ffff8880a9a17a08 R08: ffff8880a9a08580 R09: fffffbfff12a8e51
R10: fffffbfff12a8e50 R11: ffffffff89547283 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffe8ffffd70ab0 R15: ffffe8ffffd70c64
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c427d21010 CR3: 0000000090472000 CR4: 00000000001406e0