vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3)
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
vhci_hcd: connection closed
BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
ieee80211 phy13: hwaddr 02:00:00:00:0d:00 registered
PGD b1758067 P4D b1758067 PUD b2db8067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 194 Comm: kworker/u4:3 Not tainted 4.14.202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usbip_event event_handler
task: ffff8880b53a4040 task.stack: ffff8880b53b8000
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RSP: 0018:ffff8880b53bfc70 EFLAGS: 00010297
RAX: ffff8880b53a4040 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000282
RBP: fffffffffffffffc R08: ffffffff8b9b52f0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888237da48d8
vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3)
R13: ffff888237da48c8 R14: fffffbfff1923f40 R15: ffffffff89859260
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
vhci_hcd: connection closed
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
ieee80211 phy13: mac80211_hwsim_start
CR2: 000000000000001c CR3: 00000000a0607000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211 phy13: mac80211_hwsim_add_interface (type=1 mac_addr=02:00:00:00:0d:00)
 vhci_shutdown_connection+0x12a/0x240 drivers/usb/usbip/vhci_hcd.c:1035
 event_handler+0x1c3/0x4a0 drivers/usb/usbip/usbip_event.c:92
ieee80211 phy13: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:0d:00)
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 
vhci_hcd: connection closed
00 65 8b 1d 2c 1a c9 7e 83 fb 07 
vhci_hcd vhci_hcd.0: pdev(1) rhport(1) sockfd(3)
0f 
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
87 
ieee80211 phy13:   ERP_CTS_PROT: 0
5b 04 00 00 e8 8e 
ieee80211 phy13:   ERP_PREAMBLE: 0
d5 1e 00 89 db 48 0f a3 
ieee80211 phy13:   ERP_SLOT: 0
1d 3c 55 d0 08 0f 82 a2 03 00 00 e8 79 d5 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff 
usb 14-2: SetAddress Request (2) to port 1
df 
vhci_hcd vhci_hcd.0: pdev(3) rhport(1) sockfd(3)
48 
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
89 
usb 14-2: new SuperSpeed USB device number 2 using vhci_hcd
fa 
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff8880b53bfc70
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff8880b53bfc70
CR2: 000000000000001c
---[ end trace 8dad6c54a8a78c8f ]---