usb: config: fix iteration issue in 'usb_get_bos_descriptor()'
authorNiklas Neronin <niklas.neronin@linux.intel.com>
Wed, 15 Nov 2023 12:13:25 +0000 (14:13 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 21 Nov 2023 14:30:56 +0000 (15:30 +0100)
commit974bba5c118f4c2baf00de0356e3e4f7928b4cbc
treecbfdbc7ed8c8196074cdd5923bf20ba96f4c6398
parent791cd7afe51b0c770264836ab0607766e3e80f52
usb: config: fix iteration issue in 'usb_get_bos_descriptor()'

The BOS descriptor defines a root descriptor and is the base descriptor for
accessing a family of related descriptors.

Function 'usb_get_bos_descriptor()' encounters an iteration issue when
skipping the 'USB_DT_DEVICE_CAPABILITY' descriptor type. This results in
the same descriptor being read repeatedly.

To address this issue, a 'goto' statement is introduced to ensure that the
pointer and the amount read is updated correctly. This ensures that the
function iterates to the next descriptor instead of reading the same
descriptor repeatedly.

Cc: stable@vger.kernel.org
Fixes: 3dd550a2d365 ("USB: usbcore: Fix slab-out-of-bounds bug during device reset")
Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20231115121325.471454-1-niklas.neronin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/config.c