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From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
To: tiwai@suse.de, perex@perex.cz
Cc: alsa-devel@alsa-project.org
Subject: [PATCH] ALSA: core: control_led: fix memory leak in snd_ctl_led_set_state()
Date: Sun,  4 Apr 2021 15:40:31 +0900
Message-ID: <20210404064031.48711-1-o-takashi@sakamocchi.jp> (raw)

When inquired control element is not in led group, snd_ctl_led_set_state()
attempts to add the element into the group, according to function
arguments. Although an memory object is allocated for led instance, it's
left as is without being released.

This commit fixes the memory leak.

Fixes: 22d8de62f11b ("ALSA: control - add generic LED trigger module as the new control layer")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 sound/core/control_led.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/core/control_led.c b/sound/core/control_led.c
index 788fd9e275e0..b97f118cd54e 100644
--- a/sound/core/control_led.c
+++ b/sound/core/control_led.c
@@ -161,6 +161,7 @@ static void snd_ctl_led_set_state(struct snd_card *card, unsigned int access,
 			list_add(&lctl->list, &led->controls);
 			UPDATE_ROUTE(route, snd_ctl_led_get(lctl));
 		}
+		kfree(lctl);
 	}
 	mutex_unlock(&snd_ctl_led_mutex);
 	switch (led->mode) {
-- 
2.27.0


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-04  6:40 Takashi Sakamoto [this message]
2021-04-04  8:16 ` Jaroslav Kysela
2021-04-06  1:16   ` Takashi Sakamoto

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