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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 14824C35240 for ; Sun, 26 Jan 2020 07:26:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DCDA120674 for ; Sun, 26 Jan 2020 07:26:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726443AbgAZH0C (ORCPT ); Sun, 26 Jan 2020 02:26:02 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:34897 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726654AbgAZH0C (ORCPT ); Sun, 26 Jan 2020 02:26:02 -0500 Received: by mail-il1-f198.google.com with SMTP id h18so5172863ilc.2 for ; Sat, 25 Jan 2020 23:26:01 -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=d0EAYYoFJs/j+ol20aGJxzlCRa5xPQMsZhQpp42dXF8=; b=SHZxGk54z0Jmgb7HhnS1DJJttExcablCIKXub6aSuTGNcQSaAie+ksAn2JWVhkjGxE KvibyMkXZUiRQvzA4EZUXwBtlekgfkWsOkegxzS/MDU0Hi0P5FWAS9KpquiUC/aD65ol 6HqJJqFFf6lWKbR6TxjIlD7404lrk6SNyhlGAwq2iRZTc0VF3bNeUezXVRkvFB1/oQxE 4lPZRe2GQwO2OkslYNN4B69iN/q2PK6tQrNzJX+dN6N6XdJT8R42mjbjGWvrq9cT0rjV AdjrxDr785G6bg1rKc5X8i5WyvYuqBpbYih1Oos42jDpfT5MIgAH+3u+y5fd1zjtarbc oVeg== X-Gm-Message-State: APjAAAVh0FO7dZtZGRLbw6PcTWOKqHo41SaZRQHHTzp/FaxIlUFs4qIf 9ZIxgAhWtKy7BmFGvtE8HIgazu2DtyRJGOtK0eXWDgAL58M+ X-Google-Smtp-Source: APXvYqzP4/VEkdgFaSon67FgAjDduMDSjqndowqxJ0Wgxs/rNFlUGTPeaIFZks4U9WerRYsiCmp64bVGDtHXk327djrJdL8dA5Tn MIME-Version: 1.0 X-Received: by 2002:a92:85d2:: with SMTP id f201mr9111770ilh.45.1580023561398; Sat, 25 Jan 2020 23:26:01 -0800 (PST) Date: Sat, 25 Jan 2020 23:26:01 -0800 In-Reply-To: <000000000000466b64059bcb3843@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001d2faa059d05e738@google.com> Subject: Re: INFO: task hung in hashlimit_mt_check_common From: syzbot To: aarcange@redhat.com, akpm@linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, kadlec@netfilter.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org, xiyou.wangcong@gmail.com 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 7ddd8faf4399ab4f4edad5604eab35f8a87caf02 Author: Andrea Arcangeli Date: Fri Oct 13 22:57:54 2017 +0000 userfaultfd: selftest: exercise -EEXIST only in background transfer bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175625c9e00000 start commit: 8f8972a3 Merge tag 'mtd/fixes-for-5.5-rc7' of git://git.ke.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=14d625c9e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=10d625c9e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4 dashboard link: https://syzkaller.appspot.com/bug?extid=adf6c6c2be1c3a718121 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ea2559e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15ffc8bee00000 Reported-by: syzbot+adf6c6c2be1c3a718121@syzkaller.appspotmail.com Fixes: 7ddd8faf4399 ("userfaultfd: selftest: exercise -EEXIST only in background transfer") For information about bisection process see: https://goo.gl/tpsmEJ#bisection