From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 21 Nov 2011 14:47:13 +0000 (+0300)
Subject: prism54: potential memory corruption in prism54_get_essid()
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=40f9cd299a0e5e8dcdde9b5eb9bfda1cb9109f61;p=~shefty%2Frdma-dev.git

prism54: potential memory corruption in prism54_get_essid()

"dwrq->length" is the capped version of "essid->length".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index d97a2caf582..bc2ba80c47b 100644
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -778,7 +778,7 @@ prism54_get_essid(struct net_device *ndev, struct iw_request_info *info,
 		dwrq->flags = 0;
 		dwrq->length = 0;
 	}
-	essid->octets[essid->length] = '\0';
+	essid->octets[dwrq->length] = '\0';
 	memcpy(extra, essid->octets, dwrq->length);
 	kfree(essid);