mmc_test: change simple_strtol() to strict_strtol()

It's better to use strict_strtol() to convert user's input and strictly
check it. At least it forbids to interpret wrong input as a 0 and
prevents to run all tests.

Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index e27806d6458c..2888fdccd7ad 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -2024,9 +2024,10 @@ static ssize_t mmc_test_store(struct device *dev,
 {
         struct mmc_card *card = mmc_dev_to_card(dev);
         struct mmc_test_card *test;
-        int testcase;
+        long testcase;
 
-        testcase = simple_strtol(buf, NULL, 10);
+        if (strict_strtol(buf, 10, &testcase))
+                return -EINVAL;
 
         test = kzalloc(sizeof(struct mmc_test_card), GFP_KERNEL);
         if (!test)