ALSA: Use strlcpy() instead of strncpy()

We tend to make stupid mistakes with strncpy(). Let's take a safer one, strlcpy(). Signed-off-by: Takashi Iwai <[email protected]>
mj22226 · Oct 29, 2013 · 57a4451 · 57a4451
1 parent 97f44f5
commit 57a4451
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Showing 6 changed files with 8 additions and 8 deletions.
diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
@@ -185,7 +185,7 @@ static int pxa2xx_ac97_probe(struct platform_device *dev)
 		goto err;
 
 	card->dev = &dev->dev;
-	strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
+	strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 
 	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
 	if (ret)

diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
@@ -583,7 +583,7 @@ static int ak4xxx_capture_source_info(struct snd_kcontrol *kcontrol,
 	if (idx >= num_names)
 		return -EINVAL;
 	input_names = ak->adc_info[mixer_ch].input_names;
-	strncpy(uinfo->value.enumerated.name, input_names[idx],
+	strlcpy(uinfo->value.enumerated.name, input_names[idx],
 		sizeof(uinfo->value.enumerated.name));
 	return 0;
 }

diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c
@@ -161,13 +161,13 @@ int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
 	/* drop the original AD1888 HPF control */
 	memset(&elem, 0, sizeof(elem));
 	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
+	strlcpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
 	snd_ctl_remove_id(card, &elem);
 
 	/* drop the original V_REFOUT control */
 	memset(&elem, 0, sizeof(elem));
 	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	strncpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
+	strlcpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
 	snd_ctl_remove_id(card, &elem);
 
 	/* add the OLPC-specific controls */

diff --git a/sound/pci/ice1712/psc724.c b/sound/pci/ice1712/psc724.c
@@ -203,12 +203,12 @@ static void psc724_set_jack_state(struct snd_ice1712 *ice, bool hp_connected)
 	/* notify about master speaker mute change */
 	memset(&elem_id, 0, sizeof(elem_id));
 	elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	strncpy(elem_id.name, "Master Speakers Playback Switch",
+	strlcpy(elem_id.name, "Master Speakers Playback Switch",
 						sizeof(elem_id.name));
 	kctl = snd_ctl_find_id(ice->card, &elem_id);
 	snd_ctl_notify(ice->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 	/* and headphone mute change */
-	strncpy(elem_id.name, spec->wm8776.ctl[WM8776_CTL_HP_SW].name,
+	strlcpy(elem_id.name, spec->wm8776.ctl[WM8776_CTL_HP_SW].name,
 						sizeof(elem_id.name));
 	kctl = snd_ctl_find_id(ice->card, &elem_id);
 	snd_ctl_notify(ice->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);

diff --git a/sound/pci/ice1712/wm8776.c b/sound/pci/ice1712/wm8776.c
@@ -52,7 +52,7 @@ static void snd_wm8776_activate_ctl(struct snd_wm8776 *wm,
 	unsigned int index_offset;
 
 	memset(&elem_id, 0, sizeof(elem_id));
-	strncpy(elem_id.name, ctl_name, sizeof(elem_id.name));
+	strlcpy(elem_id.name, ctl_name, sizeof(elem_id.name));
 	elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	kctl = snd_ctl_find_id(card, &elem_id);
 	if (!kctl)

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
@@ -6400,7 +6400,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 		memset(&hdspm_version, 0, sizeof(hdspm_version));
 
 		hdspm_version.card_type = hdspm->io_type;
-		strncpy(hdspm_version.cardname, hdspm->card_name,
+		strlcpy(hdspm_version.cardname, hdspm->card_name,
 				sizeof(hdspm_version.cardname));
 		hdspm_version.serial = hdspm->serial;
 		hdspm_version.firmware_rev = hdspm->firmware_rev;