From nobody Mon May 25 01:17:36 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 82D4B1EEA31; Wed, 20 May 2026 02:15:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779243329; cv=none; b=F+CnfhfKXVBYK6FnRXGLHa+SSyB4ioUFqYecW7cd+oWyNa9IlZPnZwSTHugItmDHgPoDlV7XyTM7EJvRNAKdJl9nKTBRhkanAsFuhLMOUK2U2PVdbvoUZltlXayG9nCUhdIYhDXm+I9fY5eL+yPO08UM1MzrtZtGKlPL+Oqmm90= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779243329; c=relaxed/simple; bh=IlFcVSGYnP4CZioj5QK3amPqVXAoqDwpqd7DjVHMmUs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QR3xFWx9PBMLFlMB8dHQMtCkCDEcTOIc7BqqivoXSjMqOZ8XlJFPF3Aw12pkET3wNhPDM/qzOICCnko9bxMUgPjrNpafGVoDbdHFF3+CpGVMKxuY4ynvziI6y52N5NQMr0oXMu5XTekJZa1e0SSjgSx4fJGLFAaSXZPSu4hR8Rc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: c0371a2e53f111f1aa26b74ffac11d73-20260520 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:5f95d278-0ca8-4f62-be13-634d09b3a2a4,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:e7bac3a,CLOUDID:887d1953b4785460769cf36a49e66563,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:102|865|898,TC:nil,Content:0|15|50,EDM:- 3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,A V:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: c0371a2e53f111f1aa26b74ffac11d73-20260520 X-User: liujiajia@kylinos.cn Received: from nature.lan [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 909766949; Wed, 20 May 2026 10:15:20 +0800 From: Jiajia Liu To: Marcel Holtmann , Luiz Augusto von Dentz , Matthias Brugger , AngeloGioacchino Del Regno Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Jiajia Liu Subject: [PATCH] Bluetooth: btmtk: remove extra copy in cmd array init Date: Wed, 20 May 2026 10:15:00 +0800 Message-ID: <20260520021500.13504-1-liujiajia@kylinos.cn> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In btmtk_setup_firmware_79xx, the data length indicated by wmt_params.dlen in the cmd buffer is MTK_SEC_MAP_NEED_SEND_SIZE + 1. Except for the first byte, the remaining length is MTK_SEC_MAP_NEED_SEND_SIZE. memcpy copied one more byte to cmd + 1 than the remaining length. Align the length passed to memcpy to avoid exceeding current section map. Signed-off-by: Jiajia Liu --- drivers/bluetooth/btmtk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index ea7a031000cd..53cba71cb07f 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -188,7 +188,7 @@ int btmtk_setup_firmware_79xx(struct hci_dev *hdev, con= st char *fwname, MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i + MTK_SEC_MAP_COMMON_SIZE, - MTK_SEC_MAP_NEED_SEND_SIZE + 1); + MTK_SEC_MAP_NEED_SEND_SIZE); =20 wmt_params.op =3D BTMTK_WMT_PATCH_DWNLD; wmt_params.status =3D &status; --=20 2.53.0