usb 1-1: string descriptor 0 read error: -71 usb 1-1: claimed gadget: Vendor=0424 ProdID=c001 Bus=01 Device=02 usb 1-1: device path: /sys/bus/usb/devices/1-1:0.133 most_core: registered new device mdev0 (usb_device 1-1:0.133) 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 PTI CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0-rc3+ #8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:device_del+0x76/0xb90 drivers/base/core.c:2224 Code: f1 f1 f1 f1 c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 c1 ce d7 fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 82 0a 00 00 48 8b 03 4c 8d 63 60 31 f6 4c 8d 7b RSP: 0018:ffff8881d9e4f7c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8264999f RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffff8881d9e33000 R09: ffffed1039951b26 R10: ffffed1039951b25 R11: ffff8881cca8d92f R12: ffff8881cde8f828 R13: ffff8881cca8d860 R14: ffff8881cde8f730 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77df136000 CR3: 00000001cf00a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_unregister+0x11/0x30 drivers/base/core.c:2301 hdm_disconnect+0xdf/0x200 drivers/staging/most/usb/usb.c:1208 usb_unbind_interface+0x1c4/0x8b0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1082 [inline] device_release_driver_internal+0x431/0x4f0 drivers/base/dd.c:1113 bus_remove_device+0x2ee/0x4c0 drivers/base/bus.c:556 device_del+0x462/0xb90 drivers/base/core.c:2269 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x840 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+0x13f8/0x35a0 drivers/usb/core/hub.c:5432 process_one_work+0x90a/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 kthread+0x30e/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace d819a3b977ff54ad ]--- RIP: 0010:device_del+0x76/0xb90 drivers/base/core.c:2224 Code: f1 f1 f1 f1 c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 c1 ce d7 fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 82 0a 00 00 48 8b 03 4c 8d 63 60 31 f6 4c 8d 7b RSP: 0018:ffff8881d9e4f7c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8264999f RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffff8881d9e33000 R09: ffffed1039951b26 R10: ffffed1039951b25 R11: ffff8881cca8d92f R12: ffff8881cde8f828 R13: ffff8881cca8d860 R14: ffff8881cde8f730 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77df136000 CR3: 00000001cf00a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400