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, 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 24415C10F27 for ; Tue, 10 Mar 2020 09:39:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06F552467F for ; Tue, 10 Mar 2020 09:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726403AbgCJJjD (ORCPT ); Tue, 10 Mar 2020 05:39:03 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:52724 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726205AbgCJJjC (ORCPT ); Tue, 10 Mar 2020 05:39:02 -0400 Received: by mail-il1-f198.google.com with SMTP id d2so9390199ilf.19 for ; Tue, 10 Mar 2020 02:39:02 -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=Ft1PhnFnc8bw/kovbcGkfh5uu6sAnhp379YzovTXzb4=; b=Sf1xfxAruHC9O31nNiRjTCRr/cht7DMUs8+4woBQvKUicqq+j2nL1vZrB+CyQKTbrH EtjqJ1kngttbNq4lWiDvODWiWKKjetldJNUPbAWfLE2qseqr7VDvVC3syjL5Ui8Ff2fM WQln0/RsJMtPXjgHZnl4oQlHlxBtKlDx5hm42msDJHrzb6X7emJ3OA6nNRMScj6+Q/bC cUJOMBvYxiB5IecJDZmJRFgh2YsYh9gvCbhF6z5+7gY16G6aQasLkOLUbcIG1npOgUsG tWj/l8K6kRr6I+UJ0K5+tfe+f4x2KiMeOjz4bCdHcWrg4jQGPwnRZUq3jZd76/V39pwL FGjA== X-Gm-Message-State: ANhLgQ3s8hFrbfuCTtSnxub/qPfCLH0E3JYCAP+cEnGCJoZQwn2Ft4sb 6zsGv+jkY+6xhxBicQxJAyWiwYLNb04/R/uHKC85wG7gBYAk X-Google-Smtp-Source: ADFU+vv409M5ysztY4mJK7k8RhSc53CkX02mkjFwyJLPk9ilHB8ccfdDU+ZKw2MzKDgbagEXleetGkGhQoVnTDE4XxZFi+izxggG MIME-Version: 1.0 X-Received: by 2002:a92:9955:: with SMTP id p82mr6731873ili.178.1583833141776; Tue, 10 Mar 2020 02:39:01 -0700 (PDT) Date: Tue, 10 Mar 2020 02:39:01 -0700 In-Reply-To: <00000000000088452f05a07621d2@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cc985b05a07ce36f@google.com> Subject: Re: WARNING: refcount bug in sctp_wfree From: syzbot To: ardb@kernel.org, davem@davemloft.net, guohanjun@huawei.com, keescook@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-sctp@vger.kernel.org, marcelo.leitner@gmail.com, mingo@kernel.org, netdev@vger.kernel.org, nhorman@tuxdriver.com, syzkaller-bugs@googlegroups.com, vyasevich@gmail.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has bisected this bug to: commit fb041bb7c0a918b95c6889fc965cdc4a75b4c0ca Author: Will Deacon Date: Thu Nov 21 11:59:00 2019 +0000 locking/refcount: Consolidate implementations of refcount_t bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=117e9e91e00000 start commit: 2c523b34 Linux 5.6-rc5 git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=137e9e91e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=157e9e91e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a5295e161cd85b82 dashboard link: https://syzkaller.appspot.com/bug?extid=cea71eec5d6de256d54d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=164b5181e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166dd70de00000 Reported-by: syzbot+cea71eec5d6de256d54d@syzkaller.appspotmail.com Fixes: fb041bb7c0a9 ("locking/refcount: Consolidate implementations of refcount_t") For information about bisection process see: https://goo.gl/tpsmEJ#bisection