av7110: potential divide by zero

PATCH New Dan Carpenter 1 participant 1 message Nov 10, 2015

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Dan Carpenter

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2015-11-10 22:23 UTC #0 lore raw

PATCH 2/2 av7110: potential divide by zero

"len" comes from dvb_video_ioctl() and there is a possibility that it is zero. We do a divide by len later in the function so that's not ok.

Signed-off-by Dan Carpenter <[email protected]>

drivers/media/pci/ttpci/av7110_av.c +3 -0

index ccb3b2c..1cf9060 100644
@@ -1045,6 +1045,9 @@ static int play_iframe(struct av7110 *av7110, char __user *buf, unsigned int len
 
 	dprintk(2, "av7110:%p, \n", av7110);
 
+	if (len = 0)
+		return 0;
+
 	if (!(av7110->playing & RP_VIDEO)) {
 		if (av7110_av_start_play(av7110, RP_VIDEO) < 0)
 			return -EBUSY;