linux-kernel - [PATCH 5.15 085/846] Bluetooth: virtio_bt: fix memory leak in virtbt_rx

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Date:   Mon, 24 Jan 2022 19:33:22 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Soenke Huster <soenke.huster@...oes.de>,
        Marcel Holtmann <marcel@...tmann.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 085/846] Bluetooth: virtio_bt: fix memory leak in virtbt_rx_handle()

From: Soenke Huster <soenke.huster@...oes.de>

[ Upstream commit 1d0688421449718c6c5f46e458a378c9b530ba18 ]

On the reception of packets with an invalid packet type, the memory of
the allocated socket buffers is never freed. Add a default case that frees
these to avoid a memory leak.

Fixes: afd2daa26c7a ("Bluetooth: Add support for virtio transport driver")
Signed-off-by: Soenke Huster <soenke.huster@...oes.de>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/bluetooth/virtio_bt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c
index 57908ce4fae85..076e4942a3f0e 100644
--- a/drivers/bluetooth/virtio_bt.c
+++ b/drivers/bluetooth/virtio_bt.c
@@ -202,6 +202,9 @@ static void virtbt_rx_handle(struct virtio_bluetooth *vbt, struct sk_buff *skb)
 		hci_skb_pkt_type(skb) = pkt_type;
 		hci_recv_frame(vbt->hdev, skb);
 		break;
+	default:
+		kfree_skb(skb);
+		break;
 	}
 }
 
-- 
2.34.1