From nobody Tue Apr 7 16:31:00 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 BAC0BECAAD4 for ; Fri, 26 Aug 2022 15:12:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343927AbiHZPMr (ORCPT ); Fri, 26 Aug 2022 11:12:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343507AbiHZPLZ (ORCPT ); Fri, 26 Aug 2022 11:11:25 -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 7C5D9DEB46 for ; Fri, 26 Aug 2022 08:09:12 -0700 (PDT) Received: by mail-ed1-x54a.google.com with SMTP id w20-20020a05640234d400b00447e6ffefccso1264860edc.0 for ; Fri, 26 Aug 2022 08:09:12 -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; bh=7FFI4T9ldWmH+mtJkkuNX0Iy/L7lZFULsA12RNz3xXM=; b=QeYGUAhX5R1EbSsJKxcsBcPRZBVW1PHkAvLdrlFwdXozptYGSnAUgNLSENVZNbs/pm K7DsUzuQ3O+CgsIf/IsEjZ9LO6DDEbJ/9UkwQ3NFfO5E9GyCNzZ0bQPXg5zln9YU9onl g042XVM8aCr5IqAR958NCkCsQWdTGI4OQtHiGm/rgicIY9qzg4V73Kb90uYceut/3UVw nFA6k+3xgurgpKXQPV00WyHGYNj3CUHxYWE3tNF2YhTlAM4LRfiVradwPFKvsYBl8Bzt CIjpkvmBr/QmH0E2CwFFacPDaEu6Y7HjWsctPdxYCvSgU8zQkP/JHmVv1mOQDs6l/MdM WRRw== 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; bh=7FFI4T9ldWmH+mtJkkuNX0Iy/L7lZFULsA12RNz3xXM=; b=29CuGRZO3ANG9JLCmSB2BfQKHtw8ry+kkz+bKr/OEUWXL1K9Iu1aNTeJ2s1P+BZ78b zxbxIID+WBa9Y0CrNyv2eImr981461AqwGDMLTDibhxefPYlan7XjZmrrXPG7TpUIp/T PryxB2X6LOfvvR8cPkCz11iUC5zQ9hB3Kv9FovgwoSsjkGwCADH7TVBBLtnCOlDWKDqV UNZCKuK/huyakCiir43P2eKFPPjzd9hYS2J5MKDOWx73rY5PROUL48ymzVxuo30EYWyD O6m1YDPtkkRJX4W1/tlmfavBVjk+PlRsKx1iZd7RNJs9XccnyK4Bk7gcVlUJVARy9h46 RWRg== X-Gm-Message-State: ACgBeo0EIiNND3ELs16UktsFKQgpz8Se5Td3xK3ED9oaJYweOse0jP6y tJD0PI6lQJGg+uUw/wUW/aq2PaLE20Q= X-Google-Smtp-Source: AA6agR4fgqA+dojvdGvqhLNd5rEasz16MWjupX7avc3NFMUfZTqvlMHxZx6remvRJmIFi8mix2S1kZP+8vA= X-Received: from glider.muc.corp.google.com ([2a00:79e0:9c:201:5207:ac36:fdd3:502d]) (user=glider job=sendgmr) by 2002:a17:907:6d9b:b0:731:1135:dc2d with SMTP id sb27-20020a1709076d9b00b007311135dc2dmr5939518ejc.76.1661526551609; Fri, 26 Aug 2022 08:09:11 -0700 (PDT) Date: Fri, 26 Aug 2022 17:07:44 +0200 In-Reply-To: <20220826150807.723137-1-glider@google.com> Mime-Version: 1.0 References: <20220826150807.723137-1-glider@google.com> X-Mailer: git-send-email 2.37.2.672.g94769d06f0-goog Message-ID: <20220826150807.723137-22-glider@google.com> Subject: [PATCH v5 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 2.37.2.672.g94769d06f0-goog