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>
Sun, 3 Dec 2023 06:33:09 +0000 (07:33 +0100)
commit7c0244cc311a4038505b73682b7c8ceaa5c7a8c8
tree527cf7f82ab8130e194404fbb59663366f482533
parent9c6ad38d4e0d1a03b64903db03149905997b1c75
usb: config: fix iteration issue in 'usb_get_bos_descriptor()'

commit 974bba5c118f4c2baf00de0356e3e4f7928b4cbc upstream.

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