usb 1-1: New USB device strings: Mfr=1, Product=247, SerialNumber=1
usb 1-1: claimed gadget: Vendor=0424 ProdID=c001 Bus=01 Device=02
usb 1-1: device path: /sys/bus/usb/devices/1-1:9.143
most_core: registered new device mdev0 (1-1:9.143)
usb 1-1: USB disconnect, device number 2
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:device_del+0x7a/0xb80 drivers/base/core.c:2229
Code: c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 31 c0 e8 d1 9d d5 fe 48 8d 7b 40 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 79 0a 00 00 48 8b 43 40 4c 8d a3 80 00 00 00 31
RSP: 0018:ffff8881d9eff7d0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82673ddf RDI: 0000000000000040
RBP: dffffc0000000000 R08: ffff8881d9e36000 R09: ffffed1039fa22e6
R10: ffffed1039fa22e5 R11: ffff8881cfd1172f R12: ffff8881cf6b00a8
R13: ffff8881cfd11660 R14: ffff8881cf6b0030 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cc0a0 CR3: 0000000006e21000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_unregister+0x11/0x30 drivers/base/core.c:2306
 hdm_disconnect+0xdf/0x200 drivers/staging/most/usb/usb.c:1208
 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1081 [inline]
 device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1112
 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556
 device_del+0x460/0xb80 drivers/base/core.c:2274
 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
 usb_disconnect+0x284/0x830 drivers/usb/core/hub.c:2197
 hub_port_connect drivers/usb/core/hub.c:4940 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x1409/0x3590 drivers/usb/core/hub.c:5432
 process_one_work+0x905/0x1570 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x30b/0x410 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 0850138b139ed022 ]---
RIP: 0010:device_del+0x7a/0xb80 drivers/base/core.c:2229
Code: c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 31 c0 e8 d1 9d d5 fe 48 8d 7b 40 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 79 0a 00 00 48 8b 43 40 4c 8d a3 80 00 00 00 31
RSP: 0018:ffff8881d9eff7d0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82673ddf RDI: 0000000000000040
RBP: dffffc0000000000 R08: ffff8881d9e36000 R09: ffffed1039fa22e6
R10: ffffed1039fa22e5 R11: ffff8881cfd1172f R12: ffff8881cf6b00a8
R13: ffff8881cfd11660 R14: ffff8881cf6b0030 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cc0a0 CR3: 0000000006e21000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400