ALSA: oxfw: fix memory leak of discovered stream formats at error path

commit 1064bc685d359f549f91c2d5f111965a9284f328 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c
index d696d548c23af9b6cedae2ea6a69140e9016ae46..79b2942632595b7f3794e60285dcf755cae694e7 100644 (file)
--- a/sound/firewire/oxfw/oxfw.c
+++ b/sound/firewire/oxfw/oxfw.c
@@ -213,6 +213,7 @@ static int detect_quirks(struct snd_oxfw *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)
@@ -275,6 +276,12 @@ 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;