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 9ECBBC433EF for ; Sat, 18 Dec 2021 21:14:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234267AbhLRVOf (ORCPT ); Sat, 18 Dec 2021 16:14:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232249AbhLRVOe (ORCPT ); Sat, 18 Dec 2021 16:14:34 -0500 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A403BC061574; Sat, 18 Dec 2021 13:14:33 -0800 (PST) Received: by mail-lj1-x22b.google.com with SMTP id 207so9081806ljf.10; Sat, 18 Dec 2021 13:14:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:from:in-reply-to; bh=hBfPEzdnBCIolTV0JC9Xy7BosUZffVOIatmUIf7muRk=; b=mj8Y1qjGVeVNpGrpHrq+yiolEP5JKpS78Llfm6+6cOb4hddPJ41w8aUtuFI/BVcYVD GMcOCh9EcozjknygR8Dxw5eL4Wont+Ljk5WngDI/xhSwx3A7B4V8wypQ7UYQpRoYG+AY FvfHpDsXUrkkMvTW0l4mnr4a+yk+I2826vIl0dK/xO/8RKV3qXUKvpYrpVfJyzPT1EPT uqcrkGx0yYj6gzgIYtOXXgAEj7MaEV5Yup/aGZ6wq+98EyB7Zm6H/QKuVvQI4Jhvog3w Rc1jPp2VbgRLc6dSrFyPVdJoMNda9A3sLWJgJzokUbozgc7Pe3ndazyVgvQF6XdHyltZ q1LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:in-reply-to; bh=hBfPEzdnBCIolTV0JC9Xy7BosUZffVOIatmUIf7muRk=; b=Hllv7YBpNguQGOPe1x6uRj7b2SHC9vCkpTCLwf+9F1CEQqfIaet1H164QLJ5HUTb9T PkMFDjZjwDLIADOWh2yBjT8Cpf1XPfSKvW+3anxCvY+8MBVZsNOaozg786G/fiX7KMvH 8NeONCjRtTGIVD/JEvVOnsjuU978ekhC5IOxNfmaWYSeuoz+iDz3Wzfp6jYrXTgMRSqh dSKMJ4SmuDYViDl5bu/u+ldqMCEL8KWJmbDAhu2u1bnJght92gev0IO4klXNcQKhUNdi kJ63VI4KfEFqPdUJ798Wt2OGtgLwLPMncDq9dUjdWWjkpJdyxyA54PR9qsndSDngRYWC YnUw== X-Gm-Message-State: AOAM532CPbrDNIjBjZLv1oqYFyiCfn4KSbp603sQbqwcsz3LdiQ6XIQO xLN3sEWwCB372m7ig8yV6F4= X-Google-Smtp-Source: ABdhPJzucJDRxJwDLjAUbGDqu9YkGwYZijg/cBUrGwS6yu/rvwhOI8RwQi4Ibj7sq+pSubmUdTa7Jw== X-Received: by 2002:a05:651c:b23:: with SMTP id b35mr8488486ljr.286.1639862071960; Sat, 18 Dec 2021 13:14:31 -0800 (PST) Received: from [192.168.1.11] ([94.103.229.239]) by smtp.gmail.com with ESMTPSA id k15sm2092143ljg.123.2021.12.18.13.14.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 18 Dec 2021 13:14:31 -0800 (PST) Content-Type: multipart/mixed; boundary="------------cAfV080rMMnQp8FfC7sfnDiX" Message-ID: <13821c8b-c809-c820-04f0-2eadfdef0296@gmail.com> Date: Sun, 19 Dec 2021 00:14:30 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.2 Subject: Re: [syzbot] KMSAN: uninit-value in asix_mdio_read (2) Content-Language: en-US To: syzbot , andrew@lunn.ch, davem@davemloft.net, glider@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux@rempel-privat.de, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <00000000000021160205d369a962@google.com> From: Pavel Skripkin In-Reply-To: <00000000000021160205d369a962@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------cAfV080rMMnQp8FfC7sfnDiX Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/18/21 14:07, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: b0a8b5053e8b kmsan: core: add dependency on DEBUG_KERNEL > git tree: https://github.com/google/kmsan.git master > console output: https://syzkaller.appspot.com/x/log.txt?x=13a4d133b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=46a956fc7a887c60 > dashboard link: https://syzkaller.appspot.com/bug?extid=f44badb06036334e867a > compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149fddcbb00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17baef25b00000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f44badb06036334e867a@syzkaller.appspotmail.com > The last unhanded case is asix_read_cmd() == 0. Let's handle it... #syz test: https://github.com/google/kmsan.git master With regards, Pavel Skripkin --------------cAfV080rMMnQp8FfC7sfnDiX Content-Type: text/plain; charset=UTF-8; name="ph" Content-Disposition: attachment; filename="ph" Content-Transfer-Encoding: base64 ZGlmZiAtLWdpdCBhL2RyaXZlcnMvbmV0L3VzYi9hc2l4X2NvbW1vbi5jIGIvZHJpdmVycy9u ZXQvdXNiL2FzaXhfY29tbW9uLmMKaW5kZXggNDJiYTRhZjY4MDkwLi5mYjRmNmNlOTQ2NmEg MTAwNjQ0Ci0tLSBhL2RyaXZlcnMvbmV0L3VzYi9hc2l4X2NvbW1vbi5jCisrKyBiL2RyaXZl cnMvbmV0L3VzYi9hc2l4X2NvbW1vbi5jCkBAIC03Nyw3ICs3Nyw3IEBAIHN0YXRpYyBpbnQg YXNpeF9jaGVja19ob3N0X2VuYWJsZShzdHJ1Y3QgdXNibmV0ICpkZXYsIGludCBpbl9wbSkK IAkJCQkgICAgMCwgMCwgMSwgJnNtc3IsIGluX3BtKTsKIAkJaWYgKHJldCA9PSAtRU5PREVW KQogCQkJYnJlYWs7Ci0JCWVsc2UgaWYgKHJldCA8IDApCisJCWVsc2UgaWYgKHJldCA8PSAw KQogCQkJY29udGludWU7CiAJCWVsc2UgaWYgKHNtc3IgJiBBWF9IT1NUX0VOKQogCQkJYnJl YWs7Cg== --------------cAfV080rMMnQp8FfC7sfnDiX--