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 AA8F0C433F5 for ; Tue, 26 Apr 2022 16:47:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353269AbiDZQvA (ORCPT ); Tue, 26 Apr 2022 12:51:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353188AbiDZQtL (ORCPT ); Tue, 26 Apr 2022 12:49:11 -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 106DB3BBD7 for ; Tue, 26 Apr 2022 09:45:22 -0700 (PDT) Received: by mail-ed1-x54a.google.com with SMTP id dk9-20020a0564021d8900b00425a9c3d40cso8109962edb.7 for ; Tue, 26 Apr 2022 09:45:21 -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=A4BOD5bYYCwqT6UysGwaTqw9NZkJge0TWQm9U6+WrG0=; b=khSFQmZPrfoPgxGEUABi/FVW8V9rw4+gcS76epQACJKqyg7hkcjwrrNZSEPqT8cKN9 ONCpTChsOEZ0awUUpbA5x5xayPRdehOMzeg0fmzK8U1O+otCttBP994AhBNpWeRijLhC uA0BFEVHSShFszO60gnvZ/g8XEEAvlCsHxSsQtTYtMUoAiTqbiLeIdThYaket6Dbkru7 YLDTtMsAFMm7WODYFRUO4LbdZSTFrmTAN4yb5OHT1IcBSYVtVTBthQ8DYmMN9xjdT8Y5 P4oaK9oxiUba69g6lk7NgMT+HmLDsQRoGLtP+vFJRnamxCbKjs/0LNdi6KunA8g68VkO EfjA== 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=A4BOD5bYYCwqT6UysGwaTqw9NZkJge0TWQm9U6+WrG0=; b=DAFY6HvASob8QMBaeI5S61UwBEN/KRIw4sgmpMHPlBDbBDla9DphdDIWfx1BMARTVe alFEvOzN2eyKN91ZF79egVC6SU4oiA6/d7dyDcMoSHaVzCfyiEpFHQU1igYHvuoPJ5/e XpAhDfWLh1GfyV/wpSflVszPS/jhVXALm5juLFPZuusekvaIqQFyWWWsvI2/uk3h4aLP PZ1aEp7JAqNiSKoU+fSmbtJefQY/tAQrcj4IqirLvYCCH74n6VuhokJjI2+0O/1bRPxx 6CqVHNdC5NOknMhgpCPjw2kPYqm6sYdcvGS/hElg8FDC05yL48BOZQ2yyo0LtRjFtYRZ doiA== X-Gm-Message-State: AOAM531J55B8qWZbWARR1dlsMc2Il/SKAB9hELTIXitW8J8Z0QlCKC3F FyVmVaVoA9p9AIvVa/3kUee1t5M+FP0= X-Google-Smtp-Source: ABdhPJxAop9pzi2nkfiGiO4x6mNOPP93/Bjni9kA40EEqg0TirQbaSSuyCXI2m0QfvecUipohdkmvzvyeto= X-Received: from glider.muc.corp.google.com ([2a00:79e0:15:13:d580:abeb:bf6d:5726]) (user=glider job=sendgmr) by 2002:a05:6402:254e:b0:424:244:faf with SMTP id l14-20020a056402254e00b0042402440fafmr25661420edb.260.1650991520418; Tue, 26 Apr 2022 09:45:20 -0700 (PDT) Date: Tue, 26 Apr 2022 18:42:52 +0200 In-Reply-To: <20220426164315.625149-1-glider@google.com> Message-Id: <20220426164315.625149-24-glider@google.com> Mime-Version: 1.0 References: <20220426164315.625149-1-glider@google.com> X-Mailer: git-send-email 2.36.0.rc2.479.g8af0fa9b8e-goog Subject: [PATCH v3 23/46] 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 , 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-arch@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)) { -- 2.36.0.rc2.479.g8af0fa9b8e-goog