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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, kernel-janitors@vger.kernel.org,
	"Simon Sandström" <simon@nikanor.nu>
Subject: [PATCH] staging: kpc2000: prevent underflow in cpld_reconfigure()
Date: Mon, 24 Feb 2020 10:33:25 +0000	[thread overview]
Message-ID: <20200224103325.hrxdnaeqsthplu42@kili.mountain> (raw)

This function should not allow negative values of "wr_val".  If
negatives are allowed then capping the upper bound at 7 is
meaningless.  Let's make it unsigned.

Fixes: 7dc7967fc39a ("staging: kpc2000: add initial set of Daktronics drivers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/staging/kpc2000/kpc2000/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc2000/core.c b/drivers/staging/kpc2000/kpc2000/core.c
index 93cf28febdf6..7b00d7069e21 100644
--- a/drivers/staging/kpc2000/kpc2000/core.c
+++ b/drivers/staging/kpc2000/kpc2000/core.c
@@ -110,10 +110,10 @@ static ssize_t cpld_reconfigure(struct device *dev,
 				const char *buf, size_t count)
 {
 	struct kp2000_device *pcard = dev_get_drvdata(dev);
-	long wr_val;
+	unsigned long wr_val;
 	int rv;
 
-	rv = kstrtol(buf, 0, &wr_val);
+	rv = kstrtoul(buf, 0, &wr_val);
 	if (rv < 0)
 		return rv;
 	if (wr_val > 7)
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, kernel-janitors@vger.kernel.org,
	"Simon Sandström" <simon@nikanor.nu>
Subject: [PATCH] staging: kpc2000: prevent underflow in cpld_reconfigure()
Date: Mon, 24 Feb 2020 13:33:25 +0300	[thread overview]
Message-ID: <20200224103325.hrxdnaeqsthplu42@kili.mountain> (raw)

This function should not allow negative values of "wr_val".  If
negatives are allowed then capping the upper bound at 7 is
meaningless.  Let's make it unsigned.

Fixes: 7dc7967fc39a ("staging: kpc2000: add initial set of Daktronics drivers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/staging/kpc2000/kpc2000/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc2000/core.c b/drivers/staging/kpc2000/kpc2000/core.c
index 93cf28febdf6..7b00d7069e21 100644
--- a/drivers/staging/kpc2000/kpc2000/core.c
+++ b/drivers/staging/kpc2000/kpc2000/core.c
@@ -110,10 +110,10 @@ static ssize_t cpld_reconfigure(struct device *dev,
 				const char *buf, size_t count)
 {
 	struct kp2000_device *pcard = dev_get_drvdata(dev);
-	long wr_val;
+	unsigned long wr_val;
 	int rv;
 
-	rv = kstrtol(buf, 0, &wr_val);
+	rv = kstrtoul(buf, 0, &wr_val);
 	if (rv < 0)
 		return rv;
 	if (wr_val > 7)
-- 
2.11.0

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             reply	other threads:[~2020-02-24 10:33 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24 10:33 Dan Carpenter [this message]
2020-02-24 10:33 ` [PATCH] staging: kpc2000: prevent underflow in cpld_reconfigure() Dan Carpenter

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