[PATCH 4.9 04/44] ALSA: bebob: fix memory leak for M-Audio FW1814 and ProjectMix I/O at error path

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>

commit b1fbebd4164b3d170ad916dcd692cf843c9c065d upstream.

After allocating model-dependent data for M-Audio FW1814 and ProjectMix
I/O, ALSA bebob driver has memory leak at error path.

This commit releases the allocated data at the error path.

Fixes: 04a2c73c97eb('ALSA: bebob: delayed registration of sound card')
Cc: <stable@xxxxxxxxxxxxxxx> # v4.7+
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 sound/firewire/bebob/bebob.c        |    2 ++
 sound/firewire/bebob/bebob_maudio.c |    4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)

--- a/sound/firewire/bebob/bebob.c
+++ b/sound/firewire/bebob/bebob.c
@@ -263,6 +263,8 @@ do_registration(struct work_struct *work
 error:
 	mutex_unlock(&devices_mutex);
 	snd_bebob_stream_destroy_duplex(bebob);
+	kfree(bebob->maudio_special_quirk);
+	bebob->maudio_special_quirk = NULL;
 	snd_card_free(bebob->card);
 	dev_info(&bebob->unit->device,
 		 "Sound card registration failed: %d\n", err);
--- a/sound/firewire/bebob/bebob_maudio.c
+++ b/sound/firewire/bebob/bebob_maudio.c
@@ -290,10 +290,6 @@ snd_bebob_maudio_special_discover(struct
 		bebob->midi_output_ports = 2;
 	}
 end:
-	if (err < 0) {
-		kfree(params);
-		bebob->maudio_special_quirk = NULL;
-	}
 	mutex_unlock(&bebob->mutex);
 	return err;
 }