From: Dan Carpenter <dan.carpenter@oracle.com>
To: "Luis R. Rodriguez" <mcgrof@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>,
linux-wireless@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] prism54: potential memory corruption in prism54_get_essid()
Date: Mon, 21 Nov 2011 17:47:13 +0300 [thread overview]
Message-ID: <20111121144713.GA19092@elgon.mountain> (raw)
"dwrq->length" is the capped version of "essid->length".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index d97a2ca..bc2ba80 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);
reply other threads:[~2011-11-21 14:47 UTC|newest]
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