samples/kobject: Use kstrtoint instead of sscanf

Use kstrtoint function instead of sscanf and check for return values.

Signed-off-by: Rastislav Barlik <barlik@zoho.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 22 insertions, 6 deletions

diff --git a/samples/kobject/kobject-example.c b/samples/kobject/kobject-example.c
index 01562e0d4992..063aaece0bcd 100644
--- a/samples/kobject/kobject-example.c
+++ b/samples/kobject/kobject-example.c
@@ -36,7 +36,12 @@ static ssize_t foo_show(struct kobject *kobj, struct kobj_attribute *attr,
 static ssize_t foo_store(struct kobject *kobj, struct kobj_attribute *attr,
                          const char *buf, size_t count)
 {
-        sscanf(buf, "%du", &foo);
+        int ret;
+
+        ret = kstrtoint(buf, 10, &foo);
+        if (ret < 0)
+                return ret;
+
         return count;
 }
 
@@ -63,9 +68,12 @@ static ssize_t b_show(struct kobject *kobj, struct kobj_attribute *attr,
 static ssize_t b_store(struct kobject *kobj, struct kobj_attribute *attr,
                        const char *buf, size_t count)
 {
-        int var;
+        int var, ret;
+
+        ret = kstrtoint(buf, 10, &var);
+        if (ret < 0)
+                return ret;
 
-        sscanf(buf, "%du", &var);
         if (strcmp(attr->attr.name, "baz") == 0)
                 baz = var;
         else
diff --git a/samples/kobject/kset-example.c b/samples/kobject/kset-example.c
index ab5e447ec238..e80ced3a5203 100644
--- a/samples/kobject/kset-example.c
+++ b/samples/kobject/kset-example.c
@@ -120,7 +120,12 @@ static ssize_t foo_show(struct foo_obj *foo_obj, struct foo_attribute *attr,
 static ssize_t foo_store(struct foo_obj *foo_obj, struct foo_attribute *attr,
                          const char *buf, size_t count)
 {
-        sscanf(buf, "%du", &foo_obj->foo);
+        int ret;
+
+        ret = kstrtoint(buf, 10, &foo_obj->foo);
+        if (ret < 0)
+                return ret;
+
         return count;
 }
 
@@ -147,9 +152,12 @@ static ssize_t b_show(struct foo_obj *foo_obj, struct foo_attribute *attr,
 static ssize_t b_store(struct foo_obj *foo_obj, struct foo_attribute *attr,
                        const char *buf, size_t count)
 {
-        int var;
+        int var, ret;
+
+        ret = kstrtoint(buf, 10, &var);
+        if (ret < 0)
+                return ret;
 
-        sscanf(buf, "%du", &var);
         if (strcmp(attr->attr.name, "baz") == 0)
                 foo_obj->baz = var;
         else