* [PATCH] ALSA: pcmcia: Fix resource leak in snd_pdacf_probe error path
@ 2025-12-15 9:04 Haotian Zhang
2025-12-15 9:11 ` Takashi Iwai
0 siblings, 1 reply; 2+ messages in thread
From: Haotian Zhang @ 2025-12-15 9:04 UTC (permalink / raw)
To: perex, tiwai; +Cc: linux-sound, linux-kernel, Haotian Zhang, Takashi Iwai
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@suse.de>
Signed-off-by: Haotian Zhang <vulab@iscas.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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ALSA: pcmcia: Fix resource leak in snd_pdacf_probe error path
2025-12-15 9:04 [PATCH] ALSA: pcmcia: Fix resource leak in snd_pdacf_probe error path Haotian Zhang
@ 2025-12-15 9:11 ` Takashi Iwai
0 siblings, 0 replies; 2+ messages in thread
From: Takashi Iwai @ 2025-12-15 9:11 UTC (permalink / raw)
To: Haotian Zhang; +Cc: perex, tiwai, linux-sound, linux-kernel, Takashi Iwai
On Mon, 15 Dec 2025 10:04:33 +0100,
Haotian Zhang wrote:
>
> 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@suse.de>
> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Applied now. Thanks.
Takashi
^ permalink raw reply [flat|nested] 2+ messages in thread
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