usb 3-1: config 0 interface 175 altsetting 0 endpoint 0x8C has invalid wMaxPacketSize 0 usb 3-1: New USB device found, idVendor=10cf, idProduct=5502, bcdDevice=3d.24 usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 3-1: config 0 descriptor?? general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 PID: 4510 Comm: kworker/0:3 Not tainted 5.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:vmk80xx_write_packet+0x75/0x260 drivers/staging/comedi/drivers/vmk80xx.c:204 Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00 RSP: 0018:ffff8881acabf1e0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8881d2973400 RCX: ffffc9000d748000 RDX: 0000000000000002 RSI: ffffffff848b3b23 RDI: ffff8881d2973468 RBP: ffff8881c14bc800 R08: ffff8881d8f41880 R09: 0000000000000010 R10: fffffbfff1266c99 R11: ffffffff893364cf R12: ffff8881c71eb000 R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881ca24dc88 FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbb415ec518 CR3: 00000001d328f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vmk80xx_reset_device drivers/staging/comedi/drivers/vmk80xx.c:226 [inline] vmk80xx_auto_attach+0x13b1/0x17c0 drivers/staging/comedi/drivers/vmk80xx.c:814 comedi_auto_config+0x16e/0x250 drivers/staging/comedi/drivers.c:1067 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374 really_probe+0x290/0xac0 drivers/base/dd.c:551 driver_probe_device+0x223/0x350 drivers/base/dd.c:724 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 __device_attach+0x217/0x390 drivers/base/dd.c:897 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272 really_probe+0x290/0xac0 drivers/base/dd.c:551 driver_probe_device+0x223/0x350 drivers/base/dd.c:724 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 __device_attach+0x217/0x390 drivers/base/dd.c:897 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2544 hub_port_connect drivers/usb/core/hub.c:5191 [inline] hub_port_connect_change drivers/usb/core/hub.c:5331 [inline] port_event drivers/usb/core/hub.c:5477 [inline] hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5559 process_one_work+0x94b/0x1620 kernel/workqueue.c:2264 worker_thread+0x96/0xe20 kernel/workqueue.c:2410 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace ccf5bd9d7eaa96e4 ]--- RIP: 0010:vmk80xx_write_packet+0x75/0x260 drivers/staging/comedi/drivers/vmk80xx.c:204 Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00 RSP: 0018:ffff8881acabf1e0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8881d2973400 RCX: ffffc9000d748000 RDX: 0000000000000002 RSI: ffffffff848b3b23 RDI: ffff8881d2973468 RBP: ffff8881c14bc800 R08: ffff8881d8f41880 R09: 0000000000000010 R10: fffffbfff1266c99 R11: ffffffff893364cf R12: ffff8881c71eb000 R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881ca24dc88 FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbb415ec518 CR3: 00000001d328f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400