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From: Dan Carpenter <error27@gmail.com>
To: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] Staging: rc2860: return -EFAULT on copy_to_user errors
Date: Fri, 04 Jun 2010 10:39:51 +0000	[thread overview]
Message-ID: <20100604103951.GE5483@bicker> (raw)

copy_to_user() returns the number of bytes remaining but we want to
return a negative error code.  This is in the ioctl handler and the
error code gets passed to userspace.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/staging/rt2860/sta_ioctl.c b/drivers/staging/rt2860/sta_ioctl.c
index 112da7a..6b8268d 100644
--- a/drivers/staging/rt2860/sta_ioctl.c
+++ b/drivers/staging/rt2860/sta_ioctl.c
@@ -2522,6 +2522,8 @@ int rt28xx_sta_ioctl(IN struct net_device *net_dev,
 			Status  			    copy_to_user(erq->pointer, pAd->nickname,
 					 erq->length);
+			if (Status)
+				Status = -EFAULT;
 			break;
 		}
 	case SIOCGIWRATE:	/*get default bit rate (bps) */

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <error27@gmail.com>
To: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] Staging: rc2860: return -EFAULT on copy_to_user errors
Date: Fri, 4 Jun 2010 12:39:51 +0200	[thread overview]
Message-ID: <20100604103951.GE5483@bicker> (raw)

copy_to_user() returns the number of bytes remaining but we want to
return a negative error code.  This is in the ioctl handler and the
error code gets passed to userspace.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/staging/rt2860/sta_ioctl.c b/drivers/staging/rt2860/sta_ioctl.c
index 112da7a..6b8268d 100644
--- a/drivers/staging/rt2860/sta_ioctl.c
+++ b/drivers/staging/rt2860/sta_ioctl.c
@@ -2522,6 +2522,8 @@ int rt28xx_sta_ioctl(IN struct net_device *net_dev,
 			Status =
 			    copy_to_user(erq->pointer, pAd->nickname,
 					 erq->length);
+			if (Status)
+				Status = -EFAULT;
 			break;
 		}
 	case SIOCGIWRATE:	/*get default bit rate (bps) */

             reply	other threads:[~2010-06-04 10:39 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-04 10:39 Dan Carpenter [this message]
2010-06-04 10:39 ` [patch] Staging: rc2860: return -EFAULT on copy_to_user errors Dan Carpenter

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