[U-Boot] [PATCH v2 1/1] usb: musb-new: misplaced out of bounds check

[Heinrich Schuchardt]

musb->endpoints[] has array size MUSB_C_NUM_EPS.
We must check array bounds before accessing the array and not afterwards.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
v2
	do not move the ep->desc check
---
 drivers/usb/musb-new/musb_gadget_ep0.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/musb-new/musb_gadget_ep0.c b/drivers/usb/musb-new/musb_gadget_ep0.c
index 3cfcb2205a..aa57a7767d 100644
--- a/drivers/usb/musb-new/musb_gadget_ep0.c
+++ b/drivers/usb/musb-new/musb_gadget_ep0.c
@@ -95,6 +95,11 @@ static int service_tx_status_request(
 			break;
 		}
 
+		if (epnum >= MUSB_C_NUM_EPS) {
+			handled = -EINVAL;
+			break;
+		}
+
 		is_in = epnum & USB_DIR_IN;
 		if (is_in) {
 			epnum &= 0x0f;
@@ -104,7 +109,7 @@ static int service_tx_status_request(
 		}
 		regs = musb->endpoints[epnum].regs;
 
-		if (epnum >= MUSB_C_NUM_EPS || !ep->desc) {
+		if (!ep->desc) {
 			handled = -EINVAL;
 			break;
 		}
-- 
2.16.2