linux-kernel - [PATCH] SCSI: Make megaraid_ioctl() check copy_to

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Message-Id: <200609151443.12941.jesper.juhl@gmail.com>
Date:	Fri, 15 Sep 2006 14:43:11 +0200
From:	Jesper Juhl <jesper.juhl@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Seokmann Ju <Seokmann.Ju@...l.com>,
	Neela Syam Kolli <Neela.Kolli@...enio.com>,
	linux-scsi@...r.kernel.org, akpm@...l.org,
	James.Bottomley@...eleye.com, jesper.juhl@...il.com
Subject: [PATCH] SCSI: Make megaraid_ioctl() check copy_to_user() return value


Check copy_to_user() return value in drivers/scsi/megaraid.c::megadev_ioctl()
This gets rid of this little warning:
  drivers/scsi/megaraid.c:3661: warning: ignoring return value of 'copy_to_user', declared with attribute warn_unused_result


Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>
---

 drivers/scsi/megaraid.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- linux-2.6.18-rc7-git1-orig/drivers/scsi/megaraid.c	2006-09-15 13:51:15.121774000 +0200
+++ linux-2.6.18-rc7-git1/drivers/scsi/megaraid.c	2006-09-15 14:27:32.377407763 +0200
@@ -3658,8 +3658,9 @@ megadev_ioctl(struct inode *inode, struc
 			 * Send the request sense data also, irrespective of
 			 * whether the user has asked for it or not.
 			 */
-			copy_to_user(upthru->reqsensearea,
-					pthru->reqsensearea, 14);
+			if (copy_to_user(upthru->reqsensearea,
+					pthru->reqsensearea, 14))
+				rval = -EFAULT;
 
 freemem_and_return:
 			if( pthru->dataxferlen ) {



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