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From: Nguyen Dinh Phi <phind.uet@gmail.com>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, Nguyen Dinh Phi <phind.uet@gmail.com>
Subject: [PATCH RESEND] samples/kobject: Use sysfs_emit instead of snprintf
Date: Wed,  2 Mar 2022 20:07:59 +0800	[thread overview]
Message-ID: <20220302120759.380932-1-phind.uet@gmail.com> (raw)

Convert sprintf() to sysfs_emit() in order to check buffer overrun on sysfs
outputs.

Signed-off-by: Nguyen Dinh Phi <phind.uet@gmail.com>
---
 samples/kobject/kobject-example.c | 4 ++--
 samples/kobject/kset-example.c    | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/samples/kobject/kobject-example.c b/samples/kobject/kobject-example.c
index 9e383fdbaa00..96678ed73216 100644
--- a/samples/kobject/kobject-example.c
+++ b/samples/kobject/kobject-example.c
@@ -28,7 +28,7 @@ static int bar;
 static ssize_t foo_show(struct kobject *kobj, struct kobj_attribute *attr,
 			char *buf)
 {
-	return sprintf(buf, "%d\n", foo);
+	return sysfs_emit(buf, "%d\n", foo);
 }
 
 static ssize_t foo_store(struct kobject *kobj, struct kobj_attribute *attr,
@@ -60,7 +60,7 @@ static ssize_t b_show(struct kobject *kobj, struct kobj_attribute *attr,
 		var = baz;
 	else
 		var = bar;
-	return sprintf(buf, "%d\n", var);
+	return sysfs_emit(buf, "%d\n", var);
 }
 
 static ssize_t b_store(struct kobject *kobj, struct kobj_attribute *attr,
diff --git a/samples/kobject/kset-example.c b/samples/kobject/kset-example.c
index c8010f126808..52f1acabd479 100644
--- a/samples/kobject/kset-example.c
+++ b/samples/kobject/kset-example.c
@@ -112,7 +112,7 @@ static void foo_release(struct kobject *kobj)
 static ssize_t foo_show(struct foo_obj *foo_obj, struct foo_attribute *attr,
 			char *buf)
 {
-	return sprintf(buf, "%d\n", foo_obj->foo);
+	return sysfs_emit(buf, "%d\n", foo_obj->foo);
 }
 
 static ssize_t foo_store(struct foo_obj *foo_obj, struct foo_attribute *attr,
@@ -144,7 +144,7 @@ static ssize_t b_show(struct foo_obj *foo_obj, struct foo_attribute *attr,
 		var = foo_obj->baz;
 	else
 		var = foo_obj->bar;
-	return sprintf(buf, "%d\n", var);
+	return sysfs_emit(buf, "%d\n", var);
 }
 
 static ssize_t b_store(struct foo_obj *foo_obj, struct foo_attribute *attr,
-- 
2.25.1


             reply	other threads:[~2022-03-02 12:20 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-02 12:07 Nguyen Dinh Phi [this message]
2022-03-02 14:51 ` [PATCH RESEND] samples/kobject: Use sysfs_emit instead of snprintf Greg KH
2022-03-02 18:11   ` Phi Nguyen
2022-03-02 20:22     ` Greg KH
2022-03-03  8:45       ` Phi Nguyen
2022-03-03 13:09         ` Greg KH

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