]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
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>
Fri, 8 Dec 2023 07:48:02 +0000 (08:48 +0100)
commit64c27b7b2357ddb38b6afebaf46d5bff4d250702
tree384a2b542ab9fea3cdf3d82496c3feb3aa96b16f
parente704db8ea64a06a118ad782da475f293aa28d86d
usb: config: fix iteration issue in 'usb_get_bos_descriptor()'

[ Upstream commit 974bba5c118f4c2baf00de0356e3e4f7928b4cbc ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/usb/core/config.c