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 A6208C77B75 for ; Wed, 17 May 2023 19:14:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229956AbjEQTOF (ORCPT ); Wed, 17 May 2023 15:14:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34020 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230004AbjEQTOB (ORCPT ); Wed, 17 May 2023 15:14:01 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20FA7AD20 for ; Wed, 17 May 2023 12:13:50 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1ae557aaf1dso8644585ad.2 for ; Wed, 17 May 2023 12:13:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1684350830; x=1686942830; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=s3LyAD6kF+WYm6aM+dOL9pdJx+PYnMvlk4fW1DFmn8o=; b=aUN6Cw/VFUP8+Ce3d4zl8ZPmQT7+wxj4JmACdz58rbbxwEk3ZVr4Z1/5zHdUBrqcwi ee5OXXjwCTv6JjzwnROTkQ0h9MPxgv2Ietsiqce1dVljKQpSb/WAikrFdpXm9om+2lo7 O0HUc6JtU7Drp1ypY6o2YWppaBJGMTkC4Xe+o= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684350830; x=1686942830; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=s3LyAD6kF+WYm6aM+dOL9pdJx+PYnMvlk4fW1DFmn8o=; b=kJJ5e12qmJR+QKvgVfrzIykQCm50LK1+K4Z3MSEFNFY2ZO4OldAb6glrYisHeR26ui kCrdVmapkSrcdvKdzJgzp0nU7Zzij+QlpN5CpaoDOqmqQ5ZB+TAG99UVsUGtKGAlW4G4 LcjF/FPeRMGCjqbTiQNNl087IaAzkA+VvO1pi8PMpBtL+8JkzNwXG8OWgZcawnRritlN 9MDQtia+6Z9gWc3Gsr9mHl2/IXu5XsrNTwDnR4nNX4Sf0vMWwa/129nYDx7BUf50V3ws 6KJIkNmDtKuIBQc9rdaSJ8xVn6DGiNzvHtOldCqi0I2OBlQCTXszp8W8BBBhPUo1BgN2 t1Gg== X-Gm-Message-State: AC+VfDxZBXBVSC/CXbDVflLPP1CcaLxLIXfxuA71ZOH5ENxlv/RVst1l kxw6cZBnRPf5gG9u92F2agZtpQ== X-Google-Smtp-Source: ACHHUZ6dcH8haH9mHEP9elVIRuuwE25P3Is4Xzixr93z0vZSba8vGzbWx2zxi6KVOnS6/pPFpPBo2w== X-Received: by 2002:a17:902:8344:b0:1ae:3991:e4f9 with SMTP id z4-20020a170902834400b001ae3991e4f9mr5665517pln.61.1684350830446; Wed, 17 May 2023 12:13:50 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id jf15-20020a170903268f00b001ab2592ed33sm2121288plb.171.2023.05.17.12.13.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 May 2023 12:13:49 -0700 (PDT) Date: Wed, 17 May 2023 12:13:49 -0700 From: Kees Cook To: Azeem Shaikh Cc: Nilesh Javali , Manish Rangankar , GR-QLogic-Storage-Upstream@marvell.com, linux-hardening@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, "James E.J. Bottomley" , "Martin K. Petersen" Subject: Re: [PATCH] scsi: bnx2i: Replace all non-returning strlcpy with strscpy Message-ID: <202305171213.DD6DF93F39@keescook> References: <20230517143130.1519941-1-azeemshaikh38@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230517143130.1519941-1-azeemshaikh38@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 17, 2023 at 02:31:30PM +0000, Azeem Shaikh wrote: > strlcpy() reads the entire source buffer first. > This read may exceed the destination size limit. > This is both inefficient and can lead to linear read > overflows if a source string is not NUL-terminated [1]. > In an effort to remove strlcpy() completely [2], replace > strlcpy() here with strscpy(). > No return values were used, so direct replacement is safe. > > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy > [2] https://github.com/KSPP/linux/issues/89 > > Signed-off-by: Azeem Shaikh Reviewed-by: Kees Cook -- Kees Cook