Patch "usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-gadget-fsl_qe_udc-validate-endpoint-index-for-ch.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bbcaf4e578c3501723c298e2aeac36c5f68059f3
Author: Ma Ke <make_ruc2021@xxxxxxx>
Date:   Wed Jun 28 16:15:11 2023 +0800

    usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc
    
    [ Upstream commit ce9daa2efc0872a9a68ea51dc8000df05893ef2e ]
    
    We should verify the bound of the array to assure that host
    may not manipulate the index to point past endpoint array.
    
    Signed-off-by: Ma Ke <make_ruc2021@xxxxxxx>
    Acked-by: Li Yang <leoyang.li@xxxxxxx>
    Link: https://lore.kernel.org/r/20230628081511.186850-1-make_ruc2021@xxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 15db7a3868fe4..aff4050f96dd6 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1956,6 +1956,8 @@ static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
 	} else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
 		/* Get endpoint status */
 		int pipe = index & USB_ENDPOINT_NUMBER_MASK;
+		if (pipe >= USB_MAX_ENDPOINTS)
+			goto stall;
 		struct qe_ep *target_ep = &udc->eps[pipe];
 		u16 usep;
 



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