linux-kernel - [PATCH] ALSA: pcmcia: Fix resource leak in snd_pdacf

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Message-ID: <20251215090433.211-1-vulab@iscas.ac.cn>
Date: Mon, 15 Dec 2025 17:04:33 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: perex@...ex.cz,
	tiwai@...e.com
Cc: linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>,
	Takashi Iwai <tiwai@...e.de>
Subject: [PATCH] ALSA: pcmcia: Fix resource leak in snd_pdacf_probe error path

When pdacf_config() fails, snd_pdacf_probe() returns the error code
directly without freeing the sound card resources allocated by
snd_card_new(), which leads to a memory leak.

Add proper error handling to free the sound card and clear the card
list entry when pdacf_config() fails.

Fixes: 15b99ac17295 ("[PATCH] pcmcia: add return value to _config() functions")
Suggested-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 sound/pcmcia/pdaudiocf/pdaudiocf.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf.c b/sound/pcmcia/pdaudiocf/pdaudiocf.c
index 13419837dfb7..a3291e626440 100644
--- a/sound/pcmcia/pdaudiocf/pdaudiocf.c
+++ b/sound/pcmcia/pdaudiocf/pdaudiocf.c
@@ -131,7 +131,13 @@ static int snd_pdacf_probe(struct pcmcia_device *link)
 	link->config_index = 1;
 	link->config_regs = PRESENT_OPTION;
 
-	return pdacf_config(link);
+	err = pdacf_config(link);
+	if (err < 0) {
+		card_list[i] = NULL;
+		snd_card_free(card);
+		return err;
+	}
+	return 0;
 }
 
 
-- 
2.50.1.windows.1