linux-hardening - [PATCH][next] Bluetooth: hci_conn: Use struct_size() in hci_le_big_create

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Date: Wed, 1 May 2024 12:09:30 -0600
From: "Gustavo A. R. Silva" <gustavoars@...nel.org>
To: Marcel Holtmann <marcel@...tmann.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc: linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	linux-hardening@...r.kernel.org
Subject: [PATCH][next] Bluetooth: hci_conn: Use struct_size() in
 hci_le_big_create_sync()

Use struct_size() instead of the open-coded version. Similarly to
this other patch[1].

Link: https://lore.kernel.org/linux-hardening/ZiwwPmCvU25YzWek@neat/ [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 net/bluetooth/hci_conn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index d6daf55f0307..c508609be105 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -2135,7 +2135,7 @@ int hci_le_big_create_sync(struct hci_dev *hdev, struct hci_conn *hcon,
 	memcpy(pdu->bis, bis, num_bis);
 
 	return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
-			    sizeof(*pdu) + num_bis, pdu);
+			    struct_size(pdu, bis, num_bis), pdu);
 }
 
 static void create_big_complete(struct hci_dev *hdev, void *data, int err)
-- 
2.34.1