From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1BCACD8C8B for ; Tue, 10 Oct 2023 14:26:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233075AbjJJO0j (ORCPT ); Tue, 10 Oct 2023 10:26:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233043AbjJJO0b (ORCPT ); Tue, 10 Oct 2023 10:26:31 -0400 Received: from mail-wr1-x432.google.com (mail-wr1-x432.google.com [IPv6:2a00:1450:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6922191 for ; Tue, 10 Oct 2023 07:26:29 -0700 (PDT) Received: by mail-wr1-x432.google.com with SMTP id ffacd0b85a97d-323ef9a8b59so5447942f8f.3 for ; Tue, 10 Oct 2023 07:26:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1696947988; x=1697552788; darn=vger.kernel.org; h=mime-version:subject:user-agent:references:in-reply-to:message-id :date:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=OWWYCFNzdMrbtczDDxCCpqq+g3jnlifd1aXLBBBppNU=; b=Qy67VnSVtwi20DjvfhP7/74sW8JG/fIbJ6+01Fg6vyPC7OMmkBcng+skBpy5GnAXVX fBI89JmUdsFofuYKCeCHq7CBw4vxboNZ4lr8W8NQnjq29S6mXAQefLl/w/nBNVtIXc2S LlKNixTfhbcxAs3eegBtV3YUKthXWvpVhm5VI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696947988; x=1697552788; h=mime-version:subject:user-agent:references:in-reply-to:message-id :date:cc:to:from:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=OWWYCFNzdMrbtczDDxCCpqq+g3jnlifd1aXLBBBppNU=; b=SLc2/TtrdYtNEmNLziU+9ghQUWRdvUOioeAFeLrDyewAAex7GQfsRCSVDAGV2JGKxl zGcjy6uMYXS/vEp9QcQagqwbD2DChzy50j0htSh9IIi1Lq8BXyOgxX2jejMXqpUPS+K+ 2aFIC16o3aEuwVXjVldTkaOTVkxu5ebj/OD0Ehz/ivA0rP817Pi/Bwp1VukrZwelk9eZ O61oiDAK1X0wPwX02Bkt6zO4RZd5JwyW7kQuLHDhTMUnCrBPzKBB7C7NowLSDhAxDo5/ fqk66Gc39vWEYZNMJbGdVobv3xCVgjUoB9uGhIUv2d+DSMBfgL3nNCZVY0yoctDsFTYH KykQ== X-Gm-Message-State: AOJu0YxhVHS+yl2EVw/PTM1nhEcvzNc/XWv8uujV6Ld8khXN0TF1wedN xmfZshrdwCyDuIuc3EvHVaOPng== X-Google-Smtp-Source: AGHT+IHkko9I0pI1D0eoUEg+jw0MQK4OSnxFwzfBvwAh/9E7d7JTVcQjnrVyUg+SuIeucBsvvj1HkQ== X-Received: by 2002:adf:8bde:0:b0:32c:e910:b69f with SMTP id w30-20020adf8bde000000b0032ce910b69fmr1686461wra.56.1696947987756; Tue, 10 Oct 2023 07:26:27 -0700 (PDT) Received: from [10.230.43.52] ([192.19.152.250]) by smtp.gmail.com with ESMTPSA id d9-20020a5d6dc9000000b00327b5ca093dsm12788508wrz.117.2023.10.10.07.26.25 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 10 Oct 2023 07:26:26 -0700 (PDT) From: Arend Van Spriel To: "Gustavo A. R. Silva" , Arend van Spriel , Franky Lin , Hante Meuleman , Kalle Valo CC: , , , , Date: Tue, 10 Oct 2023 16:26:25 +0200 Message-ID: <18b19fb5a68.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> In-Reply-To: References: User-Agent: AquaMail/1.46.0 (build: 104600328) Subject: Re: [PATCH][next] wifi: brcmfmac: fweh: Add __counted_by for struct brcmf_fweh_queue_item and use struct_size() MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000094b6d06075d7e3e" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000094b6d06075d7e3e Content-Type: text/plain; format=flowed; charset="us-ascii" Content-Transfer-Encoding: 8bit On October 9, 2023 11:42:11 PM "Gustavo A. R. Silva" wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > Also, relocate `event->datalen = datalen;` to before calling > `memcpy(event->data, data, datalen);`, so that the __counted_by > annotation has effect, and flex-array member `data` can be properly > bounds-checked at run-time. > > While there, use struct_size() helper, instead of the open-coded > version, to calculate the size for the allocation of the whole > flexible structure, including of course, the flexible-array member. > > This code was found with the help of Coccinelle, and audited and > fixed manually. >From the description above I think this change looks sane so... Acked-by: Arend van Spriel > Signed-off-by: Gustavo A. R. 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