From: Dan Carpenter <dan.carpenter@oracle.com>
To: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch 2/2] [media] av7110: potential divide by zero
Date: Wed, 11 Nov 2015 01:23:53 +0300 [thread overview]
Message-ID: <20151110222353.GE30281@mwanda> (raw)
"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 <dan.carpenter@oracle.com>
diff --git a/drivers/media/pci/ttpci/av7110_av.c b/drivers/media/pci/ttpci/av7110_av.c
index ccb3b2c..1cf9060 100644
--- a/drivers/media/pci/ttpci/av7110_av.c
+++ b/drivers/media/pci/ttpci/av7110_av.c
@@ -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;
reply other threads:[~2015-11-10 22:24 UTC|newest]
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