ALSA: oxfw: fix memory leak of private data

commit 498fe23aad8e3b5a9554f55719c537603b4476ea upstream.

Although private data of sound card instance is usually allocated in the
tail of the instance, drivers in ALSA firewire stack allocate the private
data before allocating the instance. In this case, the private data
should be released explicitly at .private_free callback of the instance.

This commit fixes memory leak following to the above design.

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 12061a5429110e9599613a35002eb7662403de0a..696b6cf3500361e85db5dce67c86d2c86590d490 100644 (file)
--- a/sound/firewire/oxfw/oxfw.c
+++ b/sound/firewire/oxfw/oxfw.c
@@ -135,6 +135,7 @@ static void oxfw_free(struct snd_oxfw *oxfw)
 
        kfree(oxfw->spec);
        mutex_destroy(&oxfw->mutex);
+       kfree(oxfw);
 }
 
 /*