6.6-stable review patch. If anyone has any objections, please let me know.
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From: Niklas Neronin niklas.neronin@linux.intel.com
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... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/core/config.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -1047,7 +1047,7 @@ int usb_get_bos_descriptor(struct usb_de
if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { dev_notice(ddev, "descriptor type invalid, skip\n"); - continue; + goto skip_to_next_descriptor; }
switch (cap_type) { @@ -1078,6 +1078,7 @@ int usb_get_bos_descriptor(struct usb_de break; }
+skip_to_next_descriptor: total_len -= length; buffer += length; }