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From: <yang.yang29@zte.com.cn>
To: <perex@perex.cz>
Cc: <tiwai@suse.com>, <alsa-devel@alsa-project.org>,
	<linux-kernel@vger.kernel.org>, <xu.panda@zte.com.cn>,
	<yang.yang29@zte.com.cn>
Subject: [PATCH linux-next] ALSA: control-led: use strscpy() to instead of strncpy()
Date: Mon, 9 Jan 2023 19:45:51 +0800 (CST)	[thread overview]
Message-ID: <202301091945513559977@zte.com.cn> (raw)

From: Xu Panda <xu.panda@zte.com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
---
 sound/core/control_led.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/core/control_led.c b/sound/core/control_led.c
index f975cc85772b..c88653c205eb 100644
--- a/sound/core/control_led.c
+++ b/sound/core/control_led.c
@@ -534,8 +534,7 @@ static ssize_t set_led_id(struct snd_ctl_led_card *led_card, const char *buf, si
 	struct snd_ctl_elem_id id;
 	int err;

-	strncpy(buf2, buf, len);
-	buf2[len] = '\0';
+	strncpy(buf2, buf, len + 1);
 	memset(&id, 0, sizeof(id));
 	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	s = buf2;
-- 
2.15.2

WARNING: multiple messages have this Message-ID (diff)
From: <yang.yang29@zte.com.cn>
To: <perex@perex.cz>
Cc: yang.yang29@zte.com.cn, xu.panda@zte.com.cn,
	alsa-devel@alsa-project.org, tiwai@suse.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH linux-next] ALSA: control-led: use strscpy() to instead of strncpy()
Date: Mon, 9 Jan 2023 19:45:51 +0800 (CST)	[thread overview]
Message-ID: <202301091945513559977@zte.com.cn> (raw)

From: Xu Panda <xu.panda@zte.com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
---
 sound/core/control_led.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/core/control_led.c b/sound/core/control_led.c
index f975cc85772b..c88653c205eb 100644
--- a/sound/core/control_led.c
+++ b/sound/core/control_led.c
@@ -534,8 +534,7 @@ static ssize_t set_led_id(struct snd_ctl_led_card *led_card, const char *buf, si
 	struct snd_ctl_elem_id id;
 	int err;

-	strncpy(buf2, buf, len);
-	buf2[len] = '\0';
+	strncpy(buf2, buf, len + 1);
 	memset(&id, 0, sizeof(id));
 	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	s = buf2;
-- 
2.15.2

             reply	other threads:[~2023-01-09 11:46 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-09 11:45 yang.yang29 [this message]
2023-01-09 11:45 ` [PATCH linux-next] ALSA: control-led: use strscpy() to instead of strncpy() yang.yang29
2023-01-09 12:40 ` Takashi Iwai
2023-01-09 12:40   ` Takashi Iwai
2023-01-09 13:36   ` Jaroslav Kysela
2023-01-09 13:36     ` Jaroslav Kysela
2023-01-09 12:56 ` Takashi Sakamoto

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