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@suse.de>
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20251215090433.211-1-vulab@iscas.ac.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf.c b/sound/pcmcia/pdaudiocf/pdaudiocf.c
index 13419837dfb7cedf07328015d70e53c8285c63d8..a3291e626440e02ca18a39e85942c57f73270c98 100644 (file)
--- 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;
 }