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[RFC,6/6] ALSA: compress: Reference card by the device

Message ID 20230807135207.17708-8-tiwai@suse.de
State New
Headers show
Series ALSA: Fix UAF with delayed kobj release | expand

Commit Message

Takashi Iwai Aug. 7, 2023, 1:52 p.m. UTC 
Add the reference to the card object at compress device
initialization.  This fixes the potential UAF by the delayed kobj
release.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/compress_offload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index d91fa8925cde..971f6d9f5906 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -1189,7 +1189,7 @@  int snd_compress_new(struct snd_card *card, int device,
 
 	snd_compress_set_id(compr, id);
 
-	snd_device_initialize(&compr->dev, card, NULL);
+	snd_device_initialize(&compr->dev, card, card);
 	dev_set_name(&compr->dev, "comprC%iD%i", card->number, device);
 
 	ret = snd_device_new(card, SNDRV_DEV_COMPRESS, compr, &ops);