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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65E82C433EF for ; Sat, 23 Oct 2021 22:31:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4AAD260F46 for ; Sat, 23 Oct 2021 22:31:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231376AbhJWWd1 (ORCPT ); Sat, 23 Oct 2021 18:33:27 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:50164 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229730AbhJWWdZ (ORCPT ); Sat, 23 Oct 2021 18:33:25 -0400 Received: by mail-io1-f70.google.com with SMTP id l17-20020a05660227d100b005d6609eb90eso5969828ios.16 for ; Sat, 23 Oct 2021 15:31:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=y6UVuCPrdtTddXTos1RIRLhbRs6e5xn4XnoqoWxYGdQ=; b=3f4QEtVA6HiEecxX5kybv7/qzYk92tyqm45ZqF13zm+kSi5EjHdWo4kEOeu6qrnR0S XlNhOsvNIJVkiTpYeJAmhpT/6y1VNtptmNmRLw0XsYBUiBDyb18z5XkdhkR1QOthKbk8 QI2FYws3f4uZmZWR3M8UueLreHvo27A/Ng2vxRquP7ngIO6D/hOpHUe722HpWc+Hc1La welS30ph0cHZt0EFMd5u1L48ZZNmI324F8mEMijbHxWatKDF/kVtoKgodRxzznhpaWR+ +eIi8iHf8cmfByi8M5fctWDc7TZmmVbeOY8upp+t/iWFZIiLPh80B9Gp+zF9V9FpIGUA nLbg== X-Gm-Message-State: AOAM530ShjU+7YvTaVqWhyUSrV3EYvSk7xjEsdvfdz/WmTXVED0DlPln tRws7SQv2OJAgAmmhqkPiymR9qJjMVX97XS/ywPc8UjnhEe5 X-Google-Smtp-Source: ABdhPJwP6tTurFlZ9o0vQaqQm5mJ3oifEukw7svE5mRW0VVfKPNpcyTBnnnGAQbbppoLu024rpggCzziglm1vUsKV5ACLvnAwZPy MIME-Version: 1.0 X-Received: by 2002:a5e:db06:: with SMTP id q6mr5382107iop.43.1635028266212; Sat, 23 Oct 2021 15:31:06 -0700 (PDT) Date: Sat, 23 Oct 2021 15:31:06 -0700 In-Reply-To: <00000000000062d0fc05cef24c57@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000001612405cf0cafeb@google.com> Subject: Re: [syzbot] WARNING: refcount bug in sys_memfd_secret From: syzbot To: akpm@linux-foundation.org, dvyukov@google.com, fmdefrancesco@gmail.com, jordy@jordyzomer.github.io, jordy@pwning.systems, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rppt@kernel.org, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 110860541f443f950c1274f217a1a3e298670a33 Author: Jordy Zomer Date: Wed Sep 8 02:56:18 2021 +0000 mm/secretmem: use refcount_t instead of atomic_t bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=141a071cb00000 start commit: 9c0c4d24ac00 Merge tag 'block-5.15-2021-10-22' of git://gi.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=161a071cb00000 console output: https://syzkaller.appspot.com/x/log.txt?x=121a071cb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=be398dd7862f4b36 dashboard link: https://syzkaller.appspot.com/bug?extid=b904a1de3ec43711eba5 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130cabdcb00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=175b91acb00000 Reported-by: syzbot+b904a1de3ec43711eba5@syzkaller.appspotmail.com Fixes: 110860541f44 ("mm/secretmem: use refcount_t instead of atomic_t") For information about bisection process see: https://goo.gl/tpsmEJ#bisection