[Intel-gfx] [PATCH 2/2] ALSA: hda: handle UAF at probe error

[Nirmoy Das]

Call snd_card_free_on_error() on probe error instead of
calling snd_card_free() which should handle devres call orders.

Issues: https://gitlab.freedesktop.org/drm/intel/-/issues/5701
Fixes: e8ad415b7a55 ("ALSA: core: Add managed card creation")
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 sound/pci/hda/hda_intel.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 82a45f2b31c4..eb4228c9e37f 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1730,7 +1730,9 @@ static void azx_check_snoop_available(struct azx *chip)
 static void azx_probe_work(struct work_struct *work)
 {
 	struct hda_intel *hda = container_of(work, struct hda_intel, probe_work.work);
-	azx_probe_continue(&hda->chip);
+	struct azx *chip = &hda->chip;
+
+	snd_card_free_on_error(&chip->pci->dev, azx_probe_continue(chip));
 }
 
 static int default_bdl_pos_adj(struct azx *chip)
@@ -2028,7 +2030,7 @@ static void azx_firmware_cb(const struct firmware *fw, void *context)
 		dev_err(card->dev, "Cannot load firmware, continue without patching\n");
 	if (!chip->disabled) {
 		/* continue probing */
-		azx_probe_continue(chip);
+		snd_card_free_on_error(&chip->pci->dev, azx_probe_continue(chip));
 	}
 }
 #endif
@@ -2338,7 +2340,6 @@ static int azx_probe_continue(struct azx *chip)
 out_free:
 	if (err < 0) {
 		pci_set_drvdata(pci, NULL);
-		snd_card_free(chip->card);
 		return err;
 	}
 
-- 
2.35.1