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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 5D3D4C433E3 for ; Wed, 19 Aug 2020 14:51:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 29FD920882 for ; Wed, 19 Aug 2020 14:51:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728415AbgHSOvL (ORCPT ); Wed, 19 Aug 2020 10:51:11 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:50162 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727087AbgHSOvG (ORCPT ); Wed, 19 Aug 2020 10:51:06 -0400 Received: by mail-il1-f197.google.com with SMTP id b18so16895521ilh.16 for ; Wed, 19 Aug 2020 07:51:05 -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=L7T0UptgHYmri7SaCGXWygzaLJh2phRnY0wB5fixdgI=; b=CBiVK+JI1LBSSRD5CcS4Wc44SJeD9EF8bVffyqemPIMw01aC8bH66Lj92m7ZzlZi9X 80EpcBn6GM+ZEOtuL5bOwsDt+yBV18qCDu9eWl8Q4YHqfdLtLG640I37/3vERKJQO01E A0rQ8NDmZA+Ei6v9bYi36WmIjVvYN/lr2WZOWxwz0y18K3t8OpwkvMfIa287WkHRx19j pEtwlSW7XyIfoP6uerdUik1Jn+8svTPfE1WMk03uQu0K2kQ1Cgr01aZeN7azlzPvviQm 5F+DapKnEWy1+c5e6JAiFm/a0E20gSE7By8SvYJYPEisO5qQ506DmgqW6v2WRQbTafOU HvOg== X-Gm-Message-State: AOAM531s5mU+nWhnEOwNME0qSpBV4meRuPt7ZzIGNY4Rnwy/IEPz/44P 9GFhFo3c9Sn11NmDdjc54ngl5blXjS7tYl0l27oaiqY8uyhT X-Google-Smtp-Source: ABdhPJw8Eul5BA7PMHLOe+q9UZT4RyJM5c/bIGJstDY4zpBDZ19RM9Uzxo9blXQp3uPwrJTIFVk3E4JNQ3rznpSbNdvNHR3LHUnk MIME-Version: 1.0 X-Received: by 2002:a05:6602:2417:: with SMTP id s23mr19902065ioa.94.1597848665416; Wed, 19 Aug 2020 07:51:05 -0700 (PDT) Date: Wed, 19 Aug 2020 07:51:05 -0700 In-Reply-To: <000000000000568fc005ad3b57c3@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001b6bb205ad3c222b@google.com> Subject: Re: unregister_netdevice: waiting for DEV to become free (4) From: syzbot To: ast@kernel.org, bpf@vger.kernel.org, davem@davemloft.net, dvyukov@google.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mcgrof@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has bisected this issue to: commit 449325b52b7a6208f65ed67d3484fd7b7184477b Author: Alexei Starovoitov Date: Tue May 22 02:22:29 2018 +0000 umh: introduce fork_usermode_blob() helper bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11f86186900000 start commit: 18445bf4 Merge tag 'spi-fix-v5.9-rc1' of git://git.kernel... git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=13f86186900000 console output: https://syzkaller.appspot.com/x/log.txt?x=15f86186900000 kernel config: https://syzkaller.appspot.com/x/.config?x=bb68b9e8a8cc842f dashboard link: https://syzkaller.appspot.com/bug?extid=df400f2f24a1677cd7e0 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15859986900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1228fea1900000 Reported-by: syzbot+df400f2f24a1677cd7e0@syzkaller.appspotmail.com Fixes: 449325b52b7a ("umh: introduce fork_usermode_blob() helper") For information about bisection process see: https://goo.gl/tpsmEJ#bisection