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 76713C433F5 for ; Tue, 29 Mar 2022 12:43:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236631AbiC2Mo4 (ORCPT ); Tue, 29 Mar 2022 08:44:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236549AbiC2Mnz (ORCPT ); Tue, 29 Mar 2022 08:43:55 -0400 Received: from mail-ej1-x649.google.com (mail-ej1-x649.google.com [IPv6:2a00:1450:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 63D8622BD7E for ; Tue, 29 Mar 2022 05:41:35 -0700 (PDT) Received: by mail-ej1-x649.google.com with SMTP id h22-20020a1709060f5600b006b11a2d3dcfso8125893ejj.4 for ; Tue, 29 Mar 2022 05:41:35 -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=lsB3lK0aPu+8HWqdJ6/yM1q11PTSMtec/DSdWJ9paXQ=; b=Y2VTXLEBSbXPLu5uhbEKKqB5AO9gIHu9jp/jSny35LuwmGZ+c+hEVtLUWlhSpPVc22 TxOvlY9Yoi7apyfs9Ow6Y9SD8BcLDmBd8zCFsJWqvD1r8+3P/s4FNpxe3VpbUFeGmI1r M2s3smZ8WKAQfLh/zIYUs4yveEnHKHAWaMCHAYZM2EsQtnTEE9sa+vHBJ2c8G01CB99w h+wWzCDc56ZhTweuBlI3h1rdzZJaGibE55vpeLcLzYyMpMH4Nsc8X53WytkodgNs2hJR 4GEA20pYgJcw96lcVe50mTK7DAkc1u2xxRnNcQ3uEduO2cpHhhWmbgpFaG8L9ULcZ04m Xtfw== 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=lsB3lK0aPu+8HWqdJ6/yM1q11PTSMtec/DSdWJ9paXQ=; b=CylNMxgPEKIL2TWBbVn3Lz9Ru+EXRzHKoqCV/5KmeWhgpzrc61x8LXta/0gR59MHZX HK5MTz6LY4ZnNgS7G8wSKhB1+aJ418oEoFMDcN/k1KleFoMudkZqSBbsHIOO4ufJl9Dt Y0Zm/ZRcDFpj6TcyZW4uqX7IWNgfRW4TBBpq9w2DYZ+tmbzvIgjW2sIAB/rkc+LWMHrf XVnZKfRQAQrm6LlvYFmBl9+WnsB7xJ6DbL1f6HBltKjGqTgsbG5Di++DOYvRx2ISTh5V gWjeY8je6ajGhVHHUC60aVBO5qFHlR8FiygNshrpiaw2fuKU7iTFyYlc5TuQlQh7UULp icbg== X-Gm-Message-State: AOAM533q3DnRRvPZTU181oA/EQpk5Wi6dKv9vCVUXvUFjmVd3yvX1TUH MVa99EMTFtSnVHxkOHjlIoykHpsYFnY= X-Google-Smtp-Source: ABdhPJxMT7rO1P57N71ZmYbIOwRuf4arJokbiW9dyI3uwrKnuskidOOGFTc8VrM1ts4i4n0XHHumgcOFJA8= X-Received: from glider.muc.corp.google.com ([2a00:79e0:15:13:36eb:759:798f:98c3]) (user=glider job=sendgmr) by 2002:a17:906:1ec3:b0:6cf:d118:59e2 with SMTP id m3-20020a1709061ec300b006cfd11859e2mr34473282ejj.767.1648557693731; Tue, 29 Mar 2022 05:41:33 -0700 (PDT) Date: Tue, 29 Mar 2022 14:39:53 +0200 In-Reply-To: <20220329124017.737571-1-glider@google.com> Message-Id: <20220329124017.737571-25-glider@google.com> Mime-Version: 1.0 References: <20220329124017.737571-1-glider@google.com> X-Mailer: git-send-email 2.35.1.1021.g381101b075-goog Subject: [PATCH v2 24/48] Input: libps2: mark data received in __ps2_command() as initialized From: Alexander Potapenko To: glider@google.com Cc: Alexander Viro , 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 , 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)) { -- 2.35.1.1021.g381101b075-goog