From 0adcf6be1445ed50bfd4a451a7a782568f270197 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@kernel.org>
Date: Wed, 1 May 2024 14:34:53 +0200
Subject: Bluetooth: qca: fix info leak when fetching board id

Add the missing sanity check when fetching the board id to avoid leaking
slab data when later requesting the firmware.

Fixes: a7f8dedb4be2 ("Bluetooth: qca: add support for QCA2066")
Cc: stable@vger.kernel.org	# 6.7
Cc: Tim Jiang <quic_tjiang@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 drivers/bluetooth/btqca.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 664db524b1dd..8d8a664620a3 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -252,6 +252,11 @@ static int qca_read_fw_board_id(struct hci_dev *hdev, u16 *bid)
 		goto out;
 	}
 
+	if (skb->len < 3) {
+		err = -EILSEQ;
+		goto out;
+	}
+
 	*bid = (edl->data[1] << 8) + edl->data[2];
 	bt_dev_dbg(hdev, "%s: bid = %x", __func__, *bid);
 
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