From 1064bc685d359f549f91c2d5f111965a9284f328 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 17 Sep 2018 17:26:20 +0900
Subject: [PATCH] ALSA: oxfw: fix memory leak of discovered stream formats at error path
Git-commit: 1064bc685d359f549f91c2d5f111965a9284f328
Patch-mainline: v4.19-rc5
References: bsc#1051510

After finishing discover of stream formats, ALSA OXFW driver has memory
leak of allocated memory object at error path.

This commit releases the memory object at the error path.

Fixes: 6c29230e2a5f ('ALSA: oxfw: delayed registration of sound card')
Cc: <stable@vger.kernel.org> # v4.7+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/firewire/oxfw/oxfw.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/sound/firewire/oxfw/oxfw.c
+++ b/sound/firewire/oxfw/oxfw.c
@@ -214,6 +214,7 @@ static int detect_quirks(struct snd_oxfw
 static void do_registration(struct work_struct *work)
 {
 	struct snd_oxfw *oxfw = container_of(work, struct snd_oxfw, dwork.work);
+	int i;
 	int err;
 
 	if (oxfw->registered)
@@ -276,6 +277,12 @@ error:
 	snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
 	if (oxfw->has_output)
 		snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
+	for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; ++i) {
+		kfree(oxfw->tx_stream_formats[i]);
+		oxfw->tx_stream_formats[i] = NULL;
+		kfree(oxfw->rx_stream_formats[i]);
+		oxfw->rx_stream_formats[i] = NULL;
+	}
 	snd_card_free(oxfw->card);
 	kfree(oxfw->spec);
 	oxfw->spec = NULL;