From 1d9e783748ddef36fa1ae6284da09a23904b5ef5 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 11 Nov 2014 15:45:57 +0100 Subject: [PATCH] ALSA: usb-audio: Fix memory leak in FTU quirk commit 1a290581ded60e87276741f8ca97b161d2b226fc upstream. M-audio FastTrack Ultra quirk doesn't release the kzalloc'ed memory. This patch adds the private_free callback to release it properly. Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/mixer_quirks.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index f4b12c216f1c..5a723df670b4 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -885,6 +885,11 @@ static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl, return changed; } +static void kctl_private_value_free(struct snd_kcontrol *kctl) +{ + kfree((void *)kctl->private_value); +} + static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer, int validx, int bUnitID) { @@ -919,6 +924,7 @@ static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer, return -ENOMEM; } + kctl->private_free = kctl_private_value_free; err = snd_ctl_add(mixer->chip->card, kctl); if (err < 0) return err; -- 2.39.2