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

[ Upstream commit ce9daa2efc ]

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@163.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Link: https://lore.kernel.org/r/20230628081511.186850-1-make_ruc2021@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ma Ke 2023-06-28 16:15:11 +08:00 committed by Greg Kroah-Hartman
parent b1d2832d02
commit dbd27ca066
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/gadget/udc/fsl_qe_udc.c
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@ -1954,9 +1954,13 @@ 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;
struct qe_ep *target_ep = &udc->eps[pipe];
struct qe_ep *target_ep;
u16 usep;
if (pipe >= USB_MAX_ENDPOINTS)
goto stall;
target_ep = &udc->eps[pipe];
/* stall if endpoint doesn't exist */
if (!target_ep->ep.desc)
goto stall;