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

[Takashi Sakamoto]

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 at vger.kernel.org> # v4.7+
Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>
---
 sound/firewire/bebob/bebob.c        | 2 ++
 sound/firewire/bebob/bebob_maudio.c | 4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c
index 730ea91d9be8..93676354f87f 100644
--- 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);
diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c
index bd55620c6a47..164f2126a676 100644
--- a/sound/firewire/bebob/bebob_maudio.c
+++ b/sound/firewire/bebob/bebob_maudio.c
@@ -290,10 +290,6 @@ snd_bebob_maudio_special_discover(struct snd_bebob *bebob, bool is1814)
 		bebob->midi_output_ports = 2;
 	}
 end:
-	if (err < 0) {
-		kfree(params);
-		bebob->maudio_special_quirk = NULL;
-	}
 	mutex_unlock(&bebob->mutex);
 	return err;
 }
-- 
2.17.1