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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D795C433EF for ; Wed, 24 Nov 2021 13:47:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7B7396B0075; Wed, 24 Nov 2021 08:47:18 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 767666B0078; Wed, 24 Nov 2021 08:47:18 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6562A6B007B; Wed, 24 Nov 2021 08:47:18 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0245.hostedemail.com [216.40.44.245]) by kanga.kvack.org (Postfix) with ESMTP id 581386B0075 for ; Wed, 24 Nov 2021 08:47:18 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 1CD638199727 for ; Wed, 24 Nov 2021 13:47:08 +0000 (UTC) X-FDA: 78843950136.18.631CD36 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by imf08.hostedemail.com (Postfix) with ESMTP id 36278300024F for ; Wed, 24 Nov 2021 13:47:03 +0000 (UTC) Received: by mail-io1-f72.google.com with SMTP id i20-20020a0566022c9400b005ec5bb1e85eso1923442iow.1 for ; Wed, 24 Nov 2021 05:47:07 -0800 (PST) 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=w8KNWN5k8usq5kIs6yZF5uGq4fyHvwNbxGeGmIcl1SI=; b=uGxYxAAf2lNndr5izZhcZbDZ36lDFmrhCfy5gO/OWFTTP5jaJG94/XjjEDSHa1sr7W urdYzcw5JRgkj9MsBqoA3A5yrRq5kWg6uf3V+gBLcmiyd+GYKRZM62V+J0MQR95ltGyi W+Bfw33ZtUv4XkeNvFHyCPVgKnqZyTZVVY20tXijuo6p3P24LZxZz4wo3sp3dwOve654 UvfpimtcHWs9hgZjKF43Gtc1Lz03dBQ+0JyBzQAFLUUhgKY3aJqa8ADdRR2Rg2J2EPaC jrnzWoqDjF+k2KZOBbix1Lweig3a355bQwmXGn63DTqQItkdcf+eo8y3Ls86XzCarapo xN+g== X-Gm-Message-State: AOAM530AUZiarAZxFlcb67/BAIuGdPskvUTyxq+J/iSvktwGuGUc1N8w leEgeTl7w5AWMtOSfEnmtCDe8EQkGWgIfaW8uO7rdZdEfbsM X-Google-Smtp-Source: ABdhPJwq3s1JeTA8P4XTcawFUqUpzwHD16hTfE6M5zYXq6aiMGdlavvBPwbljhdJQnalmbuiYvAPEqfkqFTBwMpSHwtAfGUkz3lZ MIME-Version: 1.0 X-Received: by 2002:a05:6e02:587:: with SMTP id c7mr13176266ils.311.1637761626006; Wed, 24 Nov 2021 05:47:06 -0800 (PST) Date: Wed, 24 Nov 2021 05:47:06 -0800 In-Reply-To: <00000000000062d0fc05cef24c57@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f1ea7c05d189175f@google.com> Subject: Re: [syzbot] WARNING: refcount bug in sys_memfd_secret From: syzbot To: akpm@linux-foundation.org, dvyukov@google.com, fgheet255t@gmail.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, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 36278300024F X-Stat-Signature: ws13coa9jroonykjb6g16bik5p7ipy95 Authentication-Results: imf08.hostedemail.com; dkim=none; spf=pass (imf08.hostedemail.com: domain of 3WkKeYQkbAGsbhiTJUUNaJYYRM.PXXPUNdbNaLXWcNWc.LXV@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.72 as permitted sender) smtp.mailfrom=3WkKeYQkbAGsbhiTJUUNaJYYRM.PXXPUNdbNaLXWcNWc.LXV@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) X-HE-Tag: 1637761623-364350 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 suspects this issue was fixed by commit: commit 87066fdd2e30fe9dd531125d95257c118a74617e Author: Linus Torvalds Date: Sun Oct 24 19:48:33 2021 +0000 Revert "mm/secretmem: use refcount_t instead of atomic_t" bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11cccf06b00000 start commit: 9c0c4d24ac00 Merge tag 'block-5.15-2021-10-22' of git://gi.. git tree: upstream 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 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: Revert "mm/secretmem: use refcount_t instead of atomic_t" For information about bisection process see: https://goo.gl/tpsmEJ#bisection