linux-kernel - [patch] mtip32xx: double free if copy_from

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Message-ID: <20110921071250.GE4999@elgon.mountain>
Date:	Wed, 21 Sep 2011 10:12:50 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Asai Thambi S P <asamymuthupa@...ron.com>
Cc:	Jens Axboe <jaxboe@...ionio.com>,
	Sam Bradshaw <sbradshaw@...ron.com>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] mtip32xx: double free if copy_from_user() fails

We call kfree(req_task) after we go to abort so it isn't needed here.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 847b8ff..0d23d8c 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -1674,7 +1674,6 @@ static int exec_drive_taskfile(struct driver_data *dd,
 		intotal = compat_tasksize + req_task->out_size;
 	} else {
 		if (copy_from_user(req_task, buf, tasksize)) {
-			kfree(req_task);
 			err = -EFAULT;
 			goto abort;
 		}
--
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