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=-2.4 required=3.0 tests=BAYES_00,DATE_IN_PAST_03_06, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 03EBFC433DF for ; Thu, 6 Aug 2020 16:59:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53F582086A for ; Thu, 6 Aug 2020 16:59:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729934AbgHFQ7t (ORCPT ); Thu, 6 Aug 2020 12:59:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729015AbgHFQkk (ORCPT ); Thu, 6 Aug 2020 12:40:40 -0400 Received: from mail-pj1-x1048.google.com (mail-pj1-x1048.google.com [IPv6:2607:f8b0:4864:20::1048]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7ECEC0086BF for ; Thu, 6 Aug 2020 08:40:09 -0700 (PDT) Received: by mail-pj1-x1048.google.com with SMTP id s4so7928629pjq.8 for ; Thu, 06 Aug 2020 08:40:09 -0700 (PDT) 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=656dnNAuUUnD/k18gLmyRR/+raciy1Oyj/NPSnNG5xk=; b=Qb9x6kSybloGsaxZ5zVWPFw7GBTOWjDT7Onj6xNESz+uV3WQz0HuI+a9I/HP4YbIzk FwL8gNu2aGWqnMbYtPk1jHNAM6sS2MJF7B7efXCNcrDQ4UqJfR0AY8jXMCbsnqJKP36r wj8tjRolORRljI8XJKVHzKZSxTBGDFz7AkNFQdh+WrEtUB/FuMJ0k3/9YFl65FV1NT4F WIb17Fj9F6fF0rdr1qjcSYF95ofzVhCdzxLPtQCcnZUiaWo48/8ikLZqwtLu6HpuZc35 ZvHh57AjelK01KPedxVMLdFUSNOk2UvcGzm+1plbBto3u6mSkdYMAAFc2ShdbixM6C2W StqQ== X-Gm-Message-State: AOAM530b5VT2n4Pqk5pjdKZMkhS85woEqBwfbejTuDT+bVdQA7NWf3O8 bEoyXc8yBKvEau+HL7gXiqZfYnpfqv2B6jWjNkoC8yqhYpWQ X-Google-Smtp-Source: ABdhPJwcAiTy/wffzoJCdETIFtbVqx/gf0LyEU7YnrR+t22WgktHp0EA2zFRLzq4BhmxgcgX5gUlZD0bRSKQNpJblmn7VpzbFmVA MIME-Version: 1.0 X-Received: by 2002:a92:9106:: with SMTP id t6mr10728891ild.105.1596712744169; Thu, 06 Aug 2020 04:19:04 -0700 (PDT) Date: Thu, 06 Aug 2020 04:19:04 -0700 In-Reply-To: <0000000000006925ea05a69d5bfb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ecb92805ac33a761@google.com> Subject: Re: WARNING in binder_transaction_buffer_release (2) From: syzbot To: arve@android.com, christian@brauner.io, devel@driverdev.osuosl.org, gregkh@linuxfoundation.org, jannh@google.com, joel@joelfernandes.org, linux-kernel@vger.kernel.org, maco@android.com, syzkaller-bugs@googlegroups.com, tkjos@android.com, tkjos@google.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit 4b836a1426cb0f1ef2a6e211d7e553221594f8fc Author: Jann Horn Date: Mon Jul 27 12:04:24 2020 +0000 binder: Prevent context manager from incrementing ref 0 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10c84dec900000 start commit: 9cb1fd0e Linux 5.7-rc7 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=cca7550d53ffa599 dashboard link: https://syzkaller.appspot.com/bug?extid=e113a0b970b7b3f394ba syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1230353c100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17fd535e100000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: binder: Prevent context manager from incrementing ref 0 For information about bisection process see: https://goo.gl/tpsmEJ#bisection