Patch "media: lmedm04: Handle errors for lme2510_int_read" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    media: lmedm04: Handle errors for lme2510_int_read

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:
     media-lmedm04-handle-errors-for-lme2510_int_read.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 c99ab4760e1dbeacaf50f2a57a864dd0d8366d30
Author: Chen Ni <nichen@xxxxxxxxxxx>
Date:   Tue May 21 17:10:42 2024 +0800

    media: lmedm04: Handle errors for lme2510_int_read
    
    [ Upstream commit a2836d3fe220220ff8c495ca9722f89cea8a67e7 ]
    
    Add check for the return value of usb_pipe_endpoint() and
    usb_submit_urb() in order to catch the errors.
    
    Fixes: 15e1ce33182d ("[media] lmedm04: Fix usb_submit_urb BOGUS urb xfer, pipe 1 != type 3 in interrupt urb")
    Signed-off-by: Chen Ni <nichen@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240521091042.1769684-1-nichen@xxxxxxxxxxx
    Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/media/usb/dvb-usb-v2/lmedm04.c b/drivers/media/usb/dvb-usb-v2/lmedm04.c
index fe4d886442a41..220df46f56c57 100644
--- a/drivers/media/usb/dvb-usb-v2/lmedm04.c
+++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c
@@ -373,6 +373,7 @@ static int lme2510_int_read(struct dvb_usb_adapter *adap)
 	struct dvb_usb_device *d = adap_to_d(adap);
 	struct lme2510_state *lme_int = adap_to_priv(adap);
 	struct usb_host_endpoint *ep;
+	int ret;
 
 	lme_int->lme_urb = usb_alloc_urb(0, GFP_KERNEL);
 
@@ -390,11 +391,20 @@ static int lme2510_int_read(struct dvb_usb_adapter *adap)
 
 	/* Quirk of pipe reporting PIPE_BULK but behaves as interrupt */
 	ep = usb_pipe_endpoint(d->udev, lme_int->lme_urb->pipe);
+	if (!ep) {
+		usb_free_urb(lme_int->lme_urb);
+		return -ENODEV;
+	}
 
 	if (usb_endpoint_type(&ep->desc) == USB_ENDPOINT_XFER_BULK)
 		lme_int->lme_urb->pipe = usb_rcvbulkpipe(d->udev, 0xa);
 
-	usb_submit_urb(lme_int->lme_urb, GFP_KERNEL);
+	ret = usb_submit_urb(lme_int->lme_urb, GFP_KERNEL);
+	if (ret) {
+		usb_free_urb(lme_int->lme_urb);
+		return ret;
+	}
+
 	info("INT Interrupt Service Started");
 
 	return 0;