linux-kernel - [PATCH 5.10 124/215] Bluetooth: mgmt: Fix the command returns garbage parameter value

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Message-Id: <20210715182621.397724261@linuxfoundation.org>
Date:   Thu, 15 Jul 2021 20:38:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tedd Ho-Jeong An <tedd.an@...el.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 124/215] Bluetooth: mgmt: Fix the command returns garbage parameter value

From: Tedd Ho-Jeong An <tedd.an@...el.com>

[ Upstream commit 02ce2c2c24024aade65a8d91d6a596651eaf2d0a ]

When the Get Device Flags command fails, it returns the error status
with the parameters filled with the garbage values. Although the
parameters are not used, it is better to fill with zero than the random
values.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@...el.com>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bluetooth/mgmt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7dfb96946220..31a585fe0c7c 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4038,6 +4038,8 @@ static int get_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 
 	hci_dev_lock(hdev);
 
+	memset(&rp, 0, sizeof(rp));
+
 	if (cp->addr.type == BDADDR_BREDR) {
 		br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
 							      &cp->addr.bdaddr,
-- 
2.30.2