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 A459DC433EF for ; Sat, 23 Oct 2021 22:31:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2DE6360F43 for ; Sat, 23 Oct 2021 22:31:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2DE6360F43 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id B86E96B006C; Sat, 23 Oct 2021 18:31:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B132D940007; Sat, 23 Oct 2021 18:31:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9D8016B0072; Sat, 23 Oct 2021 18:31:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0210.hostedemail.com [216.40.44.210]) by kanga.kvack.org (Postfix) with ESMTP id 89ADB6B006C for ; Sat, 23 Oct 2021 18:31:07 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 38FE08249980 for ; Sat, 23 Oct 2021 22:31:07 +0000 (UTC) X-FDA: 78729148974.22.DE870E9 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by imf26.hostedemail.com (Postfix) with ESMTP id B915420019DE for ; Sat, 23 Oct 2021 22:31:07 +0000 (UTC) Received: by mail-io1-f72.google.com with SMTP id f19-20020a6b6213000000b005ddc4ce4deeso6052011iog.0 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=N3Zxl70VJKmqLcOMAM0mMUY4YVvENtNExkEAtz65coRXoom5JwOTkFlc/T9Pq8c5tA AXVBoqIzQfhCOA3SIlDu9n/16QtHVIuh9An7WV3fQZZLdajSDbKruXEHZ1g7DAg+RU9o wX94NcJXTp0100lxIR5AHGLzQhYFXsg9n3ldaLhqzUgfKWGEHw95Rk0JpTgGlGDi5eF/ +rpudPD+QUuC7Qrr3uEnVBMobIwLw0U5taq/f3pAC5ToBua24ag4iRVkBLnPbQSuJCPC M9y/0whJjdUcRThL4GMCptybSvbHCFB0QIZJNmQobgpoCWtIyiKWHEIu+/8gPte1wYhu A64A== X-Gm-Message-State: AOAM533dgpA1LjAPdC6KszvuK9eyY88jOswgJ1pLJoNzsxCWKn58KtIc oU6BX0Tpe0jl8b9hGlPXTITP51pUSRCA1dMAlkh3yp4FhHCs 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" X-Stat-Signature: deh5ixe49jj8c5zm6hc8htu1ks44kqur X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B915420019DE Authentication-Results: imf26.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf26.hostedemail.com: domain of 3Ko10YQkbACkXdePFQQJWFUUNI.LTTLQJZXJWHTSYJSY.HTR@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.72 as permitted sender) smtp.mailfrom=3Ko10YQkbACkXdePFQQJWFUUNI.LTTLQJZXJWHTSYJSY.HTR@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com X-HE-Tag: 1635028267-830735 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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