linux-kernel - [PATCH] ALSA: virtio: Fix "Coverity: virtsnd_kctl_tlv

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Date: Tue, 13 Feb 2024 09:51:30 +0100
From: Aiswarya Cyriac <aiswarya.cyriac@...nsynergy.com>
To: mst@...hat.com,
	jasowang@...hat.com,
	perex@...ex.cz,
	tiwai@...e.com,
	linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org,
	virtualization@...ts.linux-foundation.org,
	virtio-dev@...ts.oasis-open.org
Cc: Aiswarya Cyriac <aiswarya.cyriac@...nsynergy.com>,
	Anton Yakovlev <anton.yakovlev@...nsynergy.com>,
	coverity-bot <keescook+coverity-bot@...omium.org>
Subject: [PATCH] ALSA: virtio: Fix "Coverity: virtsnd_kctl_tlv_op(): Uninitialized variables" warning.

Fix the following warning when building virtio_snd driver.

"
*** CID 1583619:  Uninitialized variables  (UNINIT)
sound/virtio/virtio_kctl.c:294 in virtsnd_kctl_tlv_op()
288
289         break;
290       }
291
292       kfree(tlv);
293
vvv     CID 1583619:  Uninitialized variables  (UNINIT)
vvv     Using uninitialized value "rc".
294       return rc;
295     }
296
297     /**
298      * virtsnd_kctl_get_enum_items() - Query items for the ENUMERATED element type.
299      * @snd: VirtIO sound device.
"

Signed-off-by: Anton Yakovlev <anton.yakovlev@...nsynergy.com>
Signed-off-by: Aiswarya Cyriac <aiswarya.cyriac@...nsynergy.com>
Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1583619 ("Uninitialized variables")
Fixes: d6568e3de42d ("ALSA: virtio: add support for audio controls")
---
 sound/virtio/virtio_kctl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/virtio/virtio_kctl.c b/sound/virtio/virtio_kctl.c
index 0c6ac74aca1e..d7a160c5db03 100644
--- a/sound/virtio/virtio_kctl.c
+++ b/sound/virtio/virtio_kctl.c
@@ -286,6 +286,11 @@ static int virtsnd_kctl_tlv_op(struct snd_kcontrol *kcontrol, int op_flag,
 		else
 			rc = virtsnd_ctl_msg_send(snd, msg, &sg, NULL, false);
 
+		break;
+	default:
+		virtsnd_ctl_msg_unref(msg);
+		rc = -EINVAL;
+
 		break;
 	}
 
-- 
2.43.0