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 B60ACECAAA1 for ; Thu, 15 Sep 2022 15:08:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230107AbiIOPIh (ORCPT ); Thu, 15 Sep 2022 11:08:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230359AbiIOPGs (ORCPT ); Thu, 15 Sep 2022 11:06:48 -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 D9CDF915C3 for ; Thu, 15 Sep 2022 08:05:34 -0700 (PDT) Received: by mail-ed1-x549.google.com with SMTP id w17-20020a056402269100b0045249bc17a9so6684560edd.9 for ; Thu, 15 Sep 2022 08:05:34 -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=ThD5yyzHqBsvDfd8Iyv19jyZ2sM12IYTnbGoqnXN5npRxs4Zmln7VoA0117GVlyvP+ L1Rc2EkzfIcjXC3nUcY1fYQ+w1h7v1L8lLr+gl/b+Stf6tF7TTC0ieLLTB5H9+8MJwTV cPTvprpV3Hin238+XDy2bE/nJu/b+H/Bo1Gl9VC7zPy+I29iyDswAthi3+gScTUunW0f D99hzKEENBt+eup4SX3Ru+YBC5gcmF6lpKUFHmW/SZGEqpj0JNmM0Xg4CfE2Gt4d5QDl B5MQFU94qthIy3W4Vl2BeQjxRVxR6rhsIvHEco9D+hMSTS0FjckD4QYWcZtWhUe10Los eI6A== 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=kEozKmI/q0wX7MJ/lfxZI0KtEorYTi5PTWWXKtm/b98UcwvjCW/yRXRPPAwJTG0k1m jx5nIZ4QIwk4Q3+buJ7yxp2/vUGd7osF73F6eDdfJBmQqEArl62mRh1eVhurJNC5FHi1 zFV+tnIFB2joqEMY4FQ59/zAUz3MCTIxabI7BCgWSzDqtSnXp6xJiKzSUixsCgo8RnQE P4VgRLwTWbJifEcXfLB//ANPtVFat18gtm6/3AsWRUJewdzllE9ruc7HktcnIL+J4mVZ U2dsMm3+kaNQy9zTEwo/1NGbBTHRKO2FQk5VQ06gGERRsfDBHDKe1DE7xkwxCjmWWWB4 SElA== X-Gm-Message-State: ACrzQf1Q71jpVSGXXVC64ME7XDV0wEfU4g/gT3rf+UqEUVcNA3RwocTG /Zw3ki3yw/LJk6d2waCg516W5D6kWio= X-Google-Smtp-Source: AMsMyM4m3KxavKH5nPSgfXzlvt1xeKFIhjuoRkROmKkrPr/lpTSHT0pnpGf9Q4HdyY1KjTTGhTSnJGDa6K8= X-Received: from glider.muc.corp.google.com ([2a00:79e0:9c:201:686d:27b5:495:85b7]) (user=glider job=sendgmr) by 2002:a05:6402:3509:b0:452:20c7:5a95 with SMTP id b9-20020a056402350900b0045220c75a95mr237534edd.427.1663254333337; Thu, 15 Sep 2022 08:05:33 -0700 (PDT) Date: Thu, 15 Sep 2022 17:03:54 +0200 In-Reply-To: <20220915150417.722975-1-glider@google.com> Mime-Version: 1.0 References: <20220915150417.722975-1-glider@google.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Message-ID: <20220915150417.722975-21-glider@google.com> Subject: [PATCH v7 20/43] 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 Biggers , 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 , Stephen Rothwell , 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)) { -- 2.37.2.789.g6183377224-goog