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
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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 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 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next 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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