From: Ma Ke make24@iscas.ac.cn

stable inclusion from stable-v6.6.51 commit b2a50ffdd1a079869a62198a8d1441355c513c7c category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAU9NW CVE: CVE-2024-46836

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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[ Upstream commit ee0d382feb44ec0f445e2ad63786cd7f3f6a8199 ]

We should verify the bound of the array to assure that host may not manipulate the index to point past endpoint array.

Found by static analysis.

Signed-off-by: Ma Ke make24@iscas.ac.cn Reviewed-by: Andrew Jeffery andrew@codeconstruct.com.au Acked-by: Andrew Jeffery andrew@codeconstruct.com.au Link: https://lore.kernel.org/r/20240625022306.2568122-1-make24@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Gu Bowen gubowen5@huawei.com --- drivers/usb/gadget/udc/aspeed_udc.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/aspeed_udc.c b/drivers/usb/gadget/udc/aspeed_udc.c index fc2ead0fe621..4868286574a1 100644 --- a/drivers/usb/gadget/udc/aspeed_udc.c +++ b/drivers/usb/gadget/udc/aspeed_udc.c @@ -1009,6 +1009,8 @@ static void ast_udc_getstatus(struct ast_udc_dev *udc) break; case USB_RECIP_ENDPOINT: epnum = crq.wIndex & USB_ENDPOINT_NUMBER_MASK; + if (epnum >= AST_UDC_NUM_ENDPOINTS) + goto stall; status = udc->ep[epnum].stopped; break; default: