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ASoC: dapm: Fix kcontrol widget name memory management 

The name field of the widget template is only used inside
snd_soc_dapm_new_control_unlocked() which allocates a copy for the actual
widget. This means we need to free the name allocated for the template in
dapm_kcontrol_data_alloc() and not the name of the actual widget in
dapm_kcontrol_free(). Otherwise we get a double free on the widget name and
a memory leak on the template name.

Fixes: 773da9b358 ("ASoC: dapm: Append "Autodisable" to autodisable widget names")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2015-07-08 21:59:59 +02:00 committed by Mark Brown
parent e50b1e06b7
commit e18077b6e5
1 changed files with 4 additions and 6 deletions
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10
sound/soc/soc-dapm.c
View File

@ -358,9 +358,10 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
data->widget =
snd_soc_dapm_new_control_unlocked(widget->dapm,
&template);
kfree(name);
if (!data->widget) {
ret = -ENOMEM;
goto err_name;
goto err_data;
}
}
break;
@ -391,9 +392,10 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
data->widget = snd_soc_dapm_new_control_unlocked(
widget->dapm, &template);
kfree(name);
if (!data->widget) {
ret = -ENOMEM;
goto err_name;
goto err_data;
}
snd_soc_dapm_add_path(widget->dapm, data->widget,
@ -408,8 +410,6 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
return 0;
err_name:
kfree(name);
err_data:
kfree(data);
return ret;
@ -418,8 +418,6 @@ err_data:
static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
if (data->widget)
kfree(data->widget->name);
kfree(data->wlist);
kfree(data);
}