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 10B4BC433F5 for ; Sat, 26 Feb 2022 13:08:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231778AbiBZNJ1 (ORCPT ); Sat, 26 Feb 2022 08:09:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231310AbiBZNJ0 (ORCPT ); Sat, 26 Feb 2022 08:09:26 -0500 Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29CC2266D98 for ; Sat, 26 Feb 2022 05:08:52 -0800 (PST) Received: by mail-lf1-x130.google.com with SMTP id d23so13824707lfv.13 for ; Sat, 26 Feb 2022 05:08:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=mZlbgfc+EA+9UvJ5AAL9SczZVuLE+XpRBZodFL/pmb4=; b=lfAWUVMvl7ycJ6MT4RIIAzPLZeMfQbS5nmEZgjokR8DcZpKg/UlTyIjsdN4VXtNkhX HIFjn/qO1PZiwqh8FENdWQkYFZnef9BDBDuFs0XtELtIQu4WAND/U5OopHS2jsIzdWnt 9/ALYIopt8Jyc2EkYwGyupCHjTWG5eZRfuMPOASoa0l9aAy6nIsr8eAdH5wMxMuR+ZDU HLxhcviT7/P+bHAL3ouCo1MSqcULzER3fxRAV4ujgWuMwCvlw3O8QrXkav6/46V2mcrn w5PSe89jPbbPOgfGNUbgZBpCosK+XKb4NzX+3IyObFaMy28hR8VoTnEZe9n3fTJeGimK Ss4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=mZlbgfc+EA+9UvJ5AAL9SczZVuLE+XpRBZodFL/pmb4=; b=oXqQA4PTAlR2XCitQ1F9iqEvemp0RobWDHJ05vntojdUrkxw/0G7HkUmAAXmCq6mLy 2PPHGS9LDH2QLf1bXNRd5A/au+aF+gWzYGM7qpPdtrnHDY3m8ZrIsa/x+w2h5P+C0JAt NcRIyEAsoPdQ4M8GPxwrJWm0UvPPb7fWC/JLmZW9MKiUlnmhABwWYWN3OaK4x4Wh2rry cNZwONJ2foBeXQWFqow5qcLrY0Fbimzjvtr2gYJQWftrzCadp9tX9ZCq3AEAvo0evSNU TMKkgiZygHDezxL5u0G+JyuSb9+RD7foZmoIBUxnSIIwZv/MJ652X1M9qMWUzqCVS9Mu wrDQ== X-Gm-Message-State: AOAM531jgfEMUstctfLUI4XcyA9+uroqE6zcHDINejaAF6I4U79bTHsi xjsdlw1vkjnqvJ8aG2Tuc88= X-Google-Smtp-Source: ABdhPJyjyWS/DaPbTaPbyJ+8ky4TFJ/2gvM1raqkICmK9rsJrhSDNb+17WC6w/PKURLdCFHMJiNL7Q== X-Received: by 2002:a05:6512:3b88:b0:443:7b08:2fcb with SMTP id g8-20020a0565123b8800b004437b082fcbmr7647000lfv.621.1645880930260; Sat, 26 Feb 2022 05:08:50 -0800 (PST) Received: from [192.168.1.11] ([94.103.229.64]) by smtp.gmail.com with ESMTPSA id h26-20020a2e3a1a000000b002460e9677d2sm558574lja.51.2022.02.26.05.08.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 26 Feb 2022 05:08:49 -0800 (PST) Message-ID: <593b1840-aba1-3fcb-daef-9cc0011d0805@gmail.com> Date: Sat, 26 Feb 2022 16:08:48 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.1 Subject: Re: [PATCH] staging: pi433: prevent uninitialized data from being printed out Content-Language: en-US To: Paulo Miguel Almeida , gregkh@linuxfoundation.org, realwakka@gmail.com Cc: linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org References: From: Pavel Skripkin In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Paulo Miguel, On 2/26/22 07:25, Paulo Miguel Almeida wrote: > local_buffer is not initialised before data is passed to > spi_sync_transfer. In case spi* function fails then the dev_dbg > statement after that can potentially print out uninitialised data > > this patch initialises local_buffer array. > > Signed-off-by: Paulo Miguel Almeida I think, it should have a Fixes: tag. > --- > Meta-comments: > > - this change was requested by Dan Carpenter in a different thread: > https://lore.kernel.org/lkml/20220207100601.GF1951@kadam/ > Worth mentioning Dan with Reported-by/Suggested-by: :) > Patch dependency: > > - this patch depends on the following patch to be applied first as > both of them change the same file: > https://lore.kernel.org/lkml/Yhla4a1Clpguoo2h@mail.google.com/ > --- You can send all these patches as a patch series with proper order. It will help maintainers to not break the order while applying. > drivers/staging/pi433/rf69.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c > index e5b23ab39c69..3028018f0b45 100644 > --- a/drivers/staging/pi433/rf69.c > +++ b/drivers/staging/pi433/rf69.c > @@ -782,7 +782,7 @@ int rf69_read_fifo(struct spi_device *spi, u8 *buffer, unsigned int size) > { > int i; > struct spi_transfer transfer; > - u8 local_buffer[FIFO_SIZE + 1]; > + u8 local_buffer[FIFO_SIZE + 1] = {}; > int retval; > > if (size > FIFO_SIZE) { With regards, Pavel Skripkin