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 D6A7BC433EF for ; Fri, 1 Jul 2022 14:26:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230133AbiGAO0v (ORCPT ); Fri, 1 Jul 2022 10:26:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232466AbiGAOZ5 (ORCPT ); Fri, 1 Jul 2022 10:25:57 -0400 Received: from mail-ed1-x549.google.com (mail-ed1-x549.google.com [IPv6:2a00:1450:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A9D044A0A for ; Fri, 1 Jul 2022 07:24:15 -0700 (PDT) Received: by mail-ed1-x549.google.com with SMTP id g8-20020a056402090800b00433940d207eso1897119edz.1 for ; Fri, 01 Jul 2022 07:24:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=7LZjp1LTGSiY93TRZ3g7FZorW8E9Cp1phv1xqeqiFUY=; b=HUp0QjEtL3POjFsPVmW7Lsr6wHh3uP0c3AIGbejYW5WBVEEA51jhGDXufEvS9+1OoF 4uVyuJc0WeTwbfhCMIs+rmrcOAjTWABoSd8Oaw1teEbFzU0MKdY/z4Slq6iDFA136+6A Dq0ghLvrTYYGXMowWhh/7yEVnmXH6kNFujWdairYknULTqhesx4Yk07JTgMa2g03KfDv ZrTJqfs2WDDcnPD58XjBPdAHHwnHRzjgo5idM+mqSJrORCqZ/jLttEcLx+95oGm5NNfU HQHKB38oaAiXzo52FsKtum2XD5ZN4s5oCz9X6TuacgVJMlaPcY5XhphiQ91hDBCbdhJB tKOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=7LZjp1LTGSiY93TRZ3g7FZorW8E9Cp1phv1xqeqiFUY=; b=IRI8Onrb6nMzRHNwVygS/EN4DpfkI1PyR4CBl2/ZYO1YrM+BveuZtPFq5AI3oy1r+C Eo4MG67bE7zlaSqpzAifF1rVbg7U+bJ3xXa4qUZYzctCFtkdpDHRDxUtGzqPJiqwW4Sc p5lWWMwXTJQAzElJUu/WZz2M8rx9ed2mWwNwBcvPlloPX+vccDl8X64GkblDA/mBqlt1 KoCvXNhmXJ2n0odiKpbU5I5CaInuORZFkzvotaM3WmllC7dHLi/kQdBpoz7fkv2a1q5P sCNc97JILDrqlK8CG4cveIn84a/3e7a4oswz41dGM2miZ1VcsicVJcz7pPSU2dq/YEoX cOfQ== X-Gm-Message-State: AJIora/1X+HFWJx/ja5Dl9i5qNnLdnAWADb+y41v52/V235eaYitdU8g zMDiNr43AeipPmMA25IYrTs408hFORU= X-Google-Smtp-Source: AGRyM1sKIpsY5lY7K78S+NlVsi52z6DpTXM615RMvKRvttRlQPej/Daek4sIgXeLlq3X+zfaa9FMqF7k7ig= X-Received: from glider.muc.corp.google.com ([2a00:79e0:9c:201:a6f5:f713:759c:abb6]) (user=glider job=sendgmr) by 2002:a05:6402:4493:b0:435:8dd5:c951 with SMTP id er19-20020a056402449300b004358dd5c951mr18955210edb.289.1656685454405; Fri, 01 Jul 2022 07:24:14 -0700 (PDT) Date: Fri, 1 Jul 2022 16:22:46 +0200 In-Reply-To: <20220701142310.2188015-1-glider@google.com> Message-Id: <20220701142310.2188015-22-glider@google.com> Mime-Version: 1.0 References: <20220701142310.2188015-1-glider@google.com> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog Subject: [PATCH v4 21/45] Input: libps2: mark data received in __ps2_command() as initialized From: Alexander Potapenko To: glider@google.com Cc: Alexander Viro , Alexei Starovoitov , Andrew Morton , Andrey Konovalov , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Christoph Hellwig , Christoph Lameter , David Rientjes , Dmitry Vyukov , Eric Dumazet , Greg Kroah-Hartman , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , Jens Axboe , Joonsoo Kim , Kees Cook , Marco Elver , Mark Rutland , Matthew Wilcox , "Michael S. Tsirkin" , Pekka Enberg , Peter Zijlstra , Petr Mladek , Steven Rostedt , Thomas Gleixner , Vasily Gorbik , Vegard Nossum , Vlastimil Babka , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org KMSAN does not know that the device initializes certain bytes in ps2dev->cmdbuf. Call kmsan_unpoison_memory() to explicitly mark them as initialized. Signed-off-by: Alexander Potapenko --- Link: https://linux-review.googlesource.com/id/I2d26f6baa45271d37320d3f4a528c39cb7e545f0 --- drivers/input/serio/libps2.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c index 250e213cc80c6..3e19344eda93c 100644 --- a/drivers/input/serio/libps2.c +++ b/drivers/input/serio/libps2.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -294,9 +295,11 @@ int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command) serio_pause_rx(ps2dev->serio); - if (param) + if (param) { for (i = 0; i < receive; i++) param[i] = ps2dev->cmdbuf[(receive - 1) - i]; + kmsan_unpoison_memory(param, receive); + } if (ps2dev->cmdcnt && (command != PS2_CMD_RESET_BAT || ps2dev->cmdcnt != 1)) { -- 2.37.0.rc0.161.g10f37bed90-goog