From nobody Mon Apr 6 18:41:38 2026 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 1B378ECAAD3 for ; Mon, 5 Sep 2022 12:29:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237908AbiIEM3d (ORCPT ); Mon, 5 Sep 2022 08:29:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237758AbiIEM16 (ORCPT ); Mon, 5 Sep 2022 08:27:58 -0400 Received: from mail-ed1-x54a.google.com (mail-ed1-x54a.google.com [IPv6:2a00:1450:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DE0B5F239 for ; Mon, 5 Sep 2022 05:25:56 -0700 (PDT) Received: by mail-ed1-x54a.google.com with SMTP id l19-20020a056402255300b0043df64f9a0fso5758050edb.16 for ; Mon, 05 Sep 2022 05:25:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=ZKRhstpgJFHnwQb7wa4PSp1fP2zpnAEklrA/+6U+C6A=; b=Xc6WWErxpVXx0dCndHy1SI9nJ2RkUM6KWSlEnHkZMNXjYMj3eWyaFlYc5HV6uVWOSB E83ahvzmgbb6ZUoBwYvIRsiXbOFt2hZ4fjxwXWmDqsk+RsSu6VyKEnzpdKQoVAg3Pqq0 0CxCR4RVmo8KuqoAF4wGXJy4Xn+lesRq/0h9FAPZBz35/v9WUgk/GXkMNXrt1nuA+y/O IEkkGPOOeNrH3Y57s/Cr5M6o3FEDG8QCVpwR8LkyrdXQzfpKPiEHtVDv3ICpVu9P0YS7 QddzXczkcNwySoyi832F6DuKvJMX2sDo+04A5YYlbMaf1CZbSK6nIYaRflozv//mECLU eOrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=ZKRhstpgJFHnwQb7wa4PSp1fP2zpnAEklrA/+6U+C6A=; b=3m4KG1F7nXxLaFqxx4c8p72FJJ57Nf27uq340Iatj4ftRBHxL0pg9HTEYgQtMr21x2 OtX+4HKXVYOyo8Vdy9m2CFm10nqO+1jc187jadAr38sneJ6Tczz0itbN4trDwwx/nSve 2M4546/ZlPQj0KXvfH5HW2Lp2dxNznyL7TdxzFgHWFsKEdNN+40fZOhMLRMPK49w+yrF OhNk7NxD/5uWKOjs4QwSEvf+IzM88HPiOcuAcczYC4/NWyULUdTlNcJyF9SiPwiCGdxi t3Z4WmmWbtem06YESlO+Pcu6QMa6xQYIo4ZZlm4VsE3aWi42pYAR3svwcvoZObJ8k6Gu DYsw== X-Gm-Message-State: ACgBeo0F4cidcu8duB/sVExXde7zK1iOncQZnvmLmgSKkk3DqBT8UCgw w8wCGidtTszuYta2Jst2NehCF+lE4T4= X-Google-Smtp-Source: AA6agR5TErPcIF0hILDHYnMq9LaM3xtffYaYn+vk0P64I6LKeQp+A0rabHx9IAlhRIbYZD3eWmQ7V5DKx/g= X-Received: from glider.muc.corp.google.com ([2a00:79e0:9c:201:b808:8d07:ab4a:554c]) (user=glider job=sendgmr) by 2002:a17:907:b15:b0:741:8ae4:f79d with SMTP id h21-20020a1709070b1500b007418ae4f79dmr25370696ejl.247.1662380755352; Mon, 05 Sep 2022 05:25:55 -0700 (PDT) Date: Mon, 5 Sep 2022 14:24:29 +0200 In-Reply-To: <20220905122452.2258262-1-glider@google.com> Mime-Version: 1.0 References: <20220905122452.2258262-1-glider@google.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Message-ID: <20220905122452.2258262-22-glider@google.com> Subject: [PATCH v6 21/44] 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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/I2d26f6baa45271d37320d3f4a52= 8c39cb7e545f0 --- 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, un= signed int command) =20 serio_pause_rx(ps2dev->serio); =20 - if (param) + if (param) { for (i =3D 0; i < receive; i++) param[i] =3D ps2dev->cmdbuf[(receive - 1) - i]; + kmsan_unpoison_memory(param, receive); + } =20 if (ps2dev->cmdcnt && (command !=3D PS2_CMD_RESET_BAT || ps2dev->cmdcnt !=3D 1)) { --=20 2.37.2.789.g6183377224-goog