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 X-Spam-Level: X-Spam-Status: No, score=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DED0C2BD09 for ; Sat, 7 Dec 2019 01:30:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7E2BE2173E for ; Sat, 7 Dec 2019 01:30:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726407AbfLGBaB (ORCPT ); Fri, 6 Dec 2019 20:30:01 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:38680 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726371AbfLGBaB (ORCPT ); Fri, 6 Dec 2019 20:30:01 -0500 Received: by mail-il1-f200.google.com with SMTP id o18so6681303ilb.5 for ; Fri, 06 Dec 2019 17:30:01 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=HNhXiE6HePkhSCnwQ3V/NPWMZ1Hpm58RJpGnE6ed2EU=; b=BT6sQirUbg8PGgN8zUFlhHmOOpKaCcJUdl1Ue4xMXkgN9vWkOOkDOzQNoLkh+3lWsg Dj3llfu32RB+ImzrBgy4aV+GZ9UtKVgxZnBoiUB9SQ0rGJa/ivm5bf6Ee5Hw/ydV5qBl wen0poGN8ZZY48CIiMk6pL9SXhh3kdGjI24tuQB3MAorxzIQTK2lDk2elV23QJBaV0CP hGfTbFgx3DGSsUIjh07sLsRmuDWaYZUXfQ0Qg5jTPBq0vy9XZUV996v3dpsfmvbXgi+R 97xELd6zm/7Pr7RTYvDaauKNVUdfhbyPfHuzzm3ZJaUWPGjtS5fXh9TZhGSS4YI7Y5af S04g== X-Gm-Message-State: APjAAAXAhjHzfDvVNK2jBvOjeT6GTeTVj+jx12Ze0oPBZxA0otS5/Nyu fPczdnDKPMe/XPSJOs/BMbgHnjMF+2rVTNALNkB3zBoL+1s/ X-Google-Smtp-Source: APXvYqxz9KBPD51VM3KJ5gnxGMtw4DWz8VDuRdv+40oCBMIhFEk1AOET+26mMuYYk8RExBPPeHQ+h/6hZNb57eiZ5RaZKKFaaCCq MIME-Version: 1.0 X-Received: by 2002:a92:9f9c:: with SMTP id z28mr17483689ilk.239.1575682200860; Fri, 06 Dec 2019 17:30:00 -0800 (PST) Date: Fri, 06 Dec 2019 17:30:00 -0800 In-Reply-To: <00000000000057e614057a9abcd3@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dc7fc70599131995@google.com> Subject: Re: KASAN: null-ptr-deref Read in refcount_sub_and_test_checked (2) From: syzbot To: hverkuil-cisco@xs4all.nl, kyungmin.park@samsung.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, m.szyprowski@samsung.com, mchehab+samsung@kernel.org, mchehab@kernel.org, pawel@osciak.com, syzkaller-bugs@googlegroups.com, tfiga@chromium.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org syzbot suspects this bug was fixed by commit: commit 62dcb4f41836bd3c44b5b651bb6df07ea4cb1551 Author: Hans Verkuil Date: Thu Nov 8 12:23:37 2018 +0000 media: vb2: check memory model for VIDIOC_CREATE_BUFS bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14972e41e00000 start commit: ccda4af0 Linux 4.20-rc2 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5 dashboard link: https://syzkaller.appspot.com/bug?extid=0468b73bdbb243217224 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d20893400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118f5a2b400000 If the result looks correct, please mark the bug fixed by replying with: #syz fix: media: vb2: check memory model for VIDIOC_CREATE_BUFS For information about bisection process see: https://goo.gl/tpsmEJ#bisection