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SubjectRe: [PATCH 5.4 17/78] HID: Fix slab-out-of-bounds read in hid_field_extract (Broken!)
Date
On 2/6/20 4:14 PM, Alan Stern wrote:
> On Thu, 6 Feb 2020, Enderborg, Peter wrote:
>
>>> Also, please post the output from "lsusb -v" for the StreamDeck.
>> Bus 002 Device 008: ID 0fd9:0060 Elgato Systems GmbH Stream Deck
>> Device Descriptor:
>>   bLength                18
>>   bDescriptorType         1
>>   bcdUSB               2.00
>>   bDeviceClass            0
>>   bDeviceSubClass         0
>>   bDeviceProtocol         0
>>   bMaxPacketSize0        64
>>   idVendor           0x0fd9 Elgato Systems GmbH
>>   idProduct          0x0060
>>   bcdDevice            1.00
>>   iManufacturer           1
>>   iProduct                2
>>   iSerial                 3
>>   bNumConfigurations      1
>>   Configuration Descriptor:
>>     bLength                 9
>>     bDescriptorType         2
>>     wTotalLength       0x0029
>>     bNumInterfaces          1
>>     bConfigurationValue     1
>>     iConfiguration          0
>>     bmAttributes         0xe0
>>       Self Powered
>>       Remote Wakeup
>>     MaxPower              400mA
>>     Interface Descriptor:
>>       bLength                 9
>>       bDescriptorType         4
>>       bInterfaceNumber        0
>>       bAlternateSetting       0
>>       bNumEndpoints           2
>>       bInterfaceClass         3 Human Interface Device
>>       bInterfaceSubClass      0
>>       bInterfaceProtocol      0
>>       iInterface              0
>>         HID Device Descriptor:
>>           bLength                 9
>>           bDescriptorType        33
>>           bcdHID               1.11
>>           bCountryCode            0 Not supported
>>           bNumDescriptors         1
>>           bDescriptorType        34 Report
>>           wDescriptorLength     248
>>          Report Descriptors:
>>            ** UNAVAILABLE **
> I was hoping to see the report descriptors. This would produce the
> actual descriptors as sent by the device, not the kernel's
> interpretation or modification of the descriptors.
>
> I guess you have to unbind the device from the usbhid driver first in
> order for lsusb to get them. Can you do that?
>
> Alan Stern
>
Im not sure exatly what you need to unbind. But I assume this is what you want:

 lsusb -v -d 0fd9:0060

Bus 002 Device 002: ID 0fd9:0060 Elgato Systems GmbH Stream Deck
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0fd9 Elgato Systems GmbH
  idProduct          0x0060
  bcdDevice            1.00
  iManufacturer           1 Elgato Systems
  iProduct                2 Stream Deck
  iSerial                 3 AL01H1A08945
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0029
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower              400mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     248
          Report Descriptor: (length is 248)
            Item(Global): Usage Page, data= [ 0x0c ] 12
                            Consumer
            Item(Local ): Usage, data= [ 0x01 ] 1
                            Consumer Control
            Item(Main  ): Collection, data= [ 0x01 ] 1
                            Application
            Item(Local ): Usage, data= [ 0x01 ] 1
                            Consumer Control
            Item(Global): Usage Page, data= [ 0x09 ] 9
                            Buttons
            Item(Local ): Usage Minimum, data= [ 0x01 ] 1
                            Button 1 (Primary)
            Item(Local ): Usage Maximum, data= [ 0x10 ] 16
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x01 ] 1
            Item(Main  ): Input, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0xa0 ] 160
            Item(Main  ): Input, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0xa1 ] 161
            Item(Main  ): Input, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0xfe 0x1f ] 8190
            Item(Global): Report ID, data= [ 0x02 ] 2
            Item(Main  ): Output, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x03 ] 3
            Item(Main  ): Feature, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x04 ] 4
            Item(Main  ): Feature, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x05 ] 5
            Item(Main  ): Feature, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x01 ] 1
            Item(Global): Report ID, data= [ 0x06 ] 6
            Item(Main  ): Feature, data= [ 0x02 ] 2
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x07 ] 7
            Item(Main  ): Feature, data= [ 0x04 ] 4
                            Data Array Relative No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x01 ] 1
            Item(Global): Report ID, data= [ 0x08 ] 8
            Item(Main  ): Feature, data= [ 0x04 ] 4
                            Data Array Relative No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x09 ] 9
            Item(Main  ): Feature, data= [ 0x04 ] 4
                            Data Array Relative No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x0a ] 10
            Item(Main  ): Feature, data= [ 0x04 ] 4
                            Data Array Relative No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): Collection, data= [ 0x00 ] 0
                            Physical
            Item(Local ): Usage, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
            Item(Global): Report Size, data= [ 0x08 ] 8
            Item(Global): Report Count, data= [ 0x10 ] 16
            Item(Global): Report ID, data= [ 0x0b ] 11
            Item(Main  ): Feature, data= [ 0x04 ] 4
                            Data Array Relative No_Wrap Linear
                            Preferred_State No_Null_Position Non_Volatile Bitfield
            Item(Main  ): End Collection, data=none
            Item(Main  ): End Collection, data=none
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes

    bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0003
  Self Powered
  Remote Wakeup Enabled
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