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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Derek Kiernan <derek.kiernan@xilinx.com>,
	Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	kernel-janitors@vger.kernel.org,
	Michal Simek <michal.simek@xilinx.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails
Date: Wed, 21 Aug 2019 07:07:02 +0000	[thread overview]
Message-ID: <20190821070702.GB26957@mwanda> (raw)
In-Reply-To: <20190821070606.GA26957@mwanda>

The copy_from_user() funciton returns the number of bytes remaining to
be copied but we want to return -EFAULT to the user.

Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/misc/xilinx_sdfec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index dc1b8b412712..813b82c59360 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
 	if (!ldpc)
 		return -ENOMEM;
 
-	ret = copy_from_user(ldpc, arg, sizeof(*ldpc));
-	if (ret)
+	if (copy_from_user(ldpc, arg, sizeof(*ldpc))) {
+		ret = -EFAULT;
 		goto err_out;
+	}
 
 	if (xsdfec->config.code = XSDFEC_TURBO_CODE) {
 		ret = -EIO;
-- 
2.20.1

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Derek Kiernan <derek.kiernan@xilinx.com>,
	Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	kernel-janitors@vger.kernel.org,
	Michal Simek <michal.simek@xilinx.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails
Date: Wed, 21 Aug 2019 10:07:02 +0300	[thread overview]
Message-ID: <20190821070702.GB26957@mwanda> (raw)
In-Reply-To: <20190821070606.GA26957@mwanda>

The copy_from_user() funciton returns the number of bytes remaining to
be copied but we want to return -EFAULT to the user.

Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/misc/xilinx_sdfec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index dc1b8b412712..813b82c59360 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
 	if (!ldpc)
 		return -ENOMEM;
 
-	ret = copy_from_user(ldpc, arg, sizeof(*ldpc));
-	if (ret)
+	if (copy_from_user(ldpc, arg, sizeof(*ldpc))) {
+		ret = -EFAULT;
 		goto err_out;
+	}
 
 	if (xsdfec->config.code == XSDFEC_TURBO_CODE) {
 		ret = -EIO;
-- 
2.20.1


_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Derek Kiernan <derek.kiernan@xilinx.com>,
	Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Michal Simek <michal.simek@xilinx.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails
Date: Wed, 21 Aug 2019 10:07:02 +0300	[thread overview]
Message-ID: <20190821070702.GB26957@mwanda> (raw)
In-Reply-To: <20190821070606.GA26957@mwanda>

The copy_from_user() funciton returns the number of bytes remaining to
be copied but we want to return -EFAULT to the user.

Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/misc/xilinx_sdfec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index dc1b8b412712..813b82c59360 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
 	if (!ldpc)
 		return -ENOMEM;
 
-	ret = copy_from_user(ldpc, arg, sizeof(*ldpc));
-	if (ret)
+	if (copy_from_user(ldpc, arg, sizeof(*ldpc))) {
+		ret = -EFAULT;
 		goto err_out;
+	}
 
 	if (xsdfec->config.code == XSDFEC_TURBO_CODE) {
 		ret = -EIO;
-- 
2.20.1


  reply	other threads:[~2019-08-21  7:07 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-21  7:06 [PATCH 1/4] misc: xilinx_sdfec: Fix a couple small information leaks Dan Carpenter
2019-08-21  7:06 ` Dan Carpenter
2019-08-21  7:06 ` Dan Carpenter
2019-08-21  7:07 ` Dan Carpenter [this message]
2019-08-21  7:07   ` [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails Dan Carpenter
2019-08-21  7:07   ` Dan Carpenter
2019-08-22  8:16   ` Michal Simek
2019-08-22  8:16     ` Michal Simek
2019-08-22  8:16     ` Michal Simek
2019-08-22  8:31   ` [PATCH 2/4 v2] " Dan Carpenter
2019-08-22  8:31     ` Dan Carpenter
2019-08-22  8:31     ` Dan Carpenter
2019-08-22 17:47   ` [PATCH 2/4] " Dragan Cvetic
2019-08-22 17:47     ` Dragan Cvetic
2019-08-22 17:47     ` Dragan Cvetic
2019-08-21  7:09 ` [PATCH 3/4] misc: xilinx_sdfec: Prevent a divide by zero in xsdfec_reg0_write() Dan Carpenter
2019-08-21  7:09   ` Dan Carpenter
2019-08-21  7:09   ` Dan Carpenter
2019-08-22  8:18   ` Michal Simek
2019-08-22  8:18     ` Michal Simek
2019-08-22  8:18     ` Michal Simek
2019-08-23  8:23   ` Dragan Cvetic
2019-08-23  8:23     ` Dragan Cvetic
2019-08-23  8:23     ` Dragan Cvetic
2019-08-21  7:11 ` [PATCH 4/4] misc: xilinx_sdfec: Prevent integer overflow in xsdfec_table_write() Dan Carpenter
2019-08-21  7:11   ` Dan Carpenter
2019-08-21  7:11   ` Dan Carpenter
2019-08-22  8:27   ` Michal Simek
2019-08-22  8:27     ` Michal Simek
2019-08-22  8:27     ` Michal Simek
2019-08-22 17:55   ` Dragan Cvetic
2019-08-22 17:55     ` Dragan Cvetic
2019-08-22 17:55     ` Dragan Cvetic
2019-08-22  8:14 ` [PATCH 1/4] misc: xilinx_sdfec: Fix a couple small information leaks Michal Simek
2019-08-22  8:14   ` Michal Simek
2019-08-22  8:14   ` Michal Simek
2019-08-22  8:28   ` Dan Carpenter
2019-08-22  8:28     ` Dan Carpenter
2019-08-22  8:28     ` Dan Carpenter
2019-08-22  8:49     ` Michal Simek
2019-08-22  8:49       ` Michal Simek
2019-08-22  8:49       ` Michal Simek
2019-08-22 17:47 ` Dragan Cvetic
2019-08-22 17:47   ` Dragan Cvetic
2019-08-22 17:47   ` Dragan Cvetic

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