From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f198.google.com (mail-pl1-f198.google.com [209.85.214.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 19FE0AD41 for ; Fri, 1 Sep 2023 14:16:34 +0000 (UTC) Received: by mail-pl1-f198.google.com with SMTP id d9443c01a7336-1c09c1fd0abso22969085ad.2 for ; Fri, 01 Sep 2023 07:16:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693577794; x=1694182594; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fcvgDbvbUw5Qcf0anbgZcfJ9WNarMzjdamecOvB7IYI=; b=NhliJc9afzewt8JC0vLf+CrvQc3buaOMVTWIlyWEFQF1fNiJ0TuZ146OWYV8dBborS Lx1y8FHEE9ZAjvG4K2w2rOucY85Anqu1wxIuJ1a9kOTNAfm8fzX0SNi0NDejPQuAiMDn QJAkV75sBPcL4uSZY4XhO6i9Pr2+30W/H1/WNt1yqTiqC4VwbDwotuvD4p62OLa+LEZi /wElaNzF4zEW5tdlirkihLqs7uGJy5cgDb9wpQ9/R/oMxOieu5I29SpI/fkjIxjSRJeW A5CIfJ4zrnjvJd7P1a2/NXvHSpIaDhqm4Kd+Oj39KLnamPVoz6XL6wO0SlF5XwObb6PV FC9A== X-Gm-Message-State: AOJu0YypSs2TLeo8l4bYCS9Ghy6NWJuiRBnLF9ksLyex36XZM0pt9Cp4 PVb91kypj2mUFf46GQUSSYAS2negWGw5Kx4dMtoWbwECVk4K X-Google-Smtp-Source: AGHT+IFc7YjlSjHvDvP7cirzcdCjKk2D/fDe+yk6UxvIvAemHVScjMtitmUI/slD7b32dT0fMgTPgbdH3RXPR+jluBVxNY9SvuDQ Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a17:902:dacb:b0:1b8:929f:1990 with SMTP id q11-20020a170902dacb00b001b8929f1990mr922243plx.6.1693577794354; Fri, 01 Sep 2023 07:16:34 -0700 (PDT) Date: Fri, 01 Sep 2023 07:16:34 -0700 In-Reply-To: <0000000000001f4d4806037fc7b8@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d5052e06044cced1@google.com> Subject: Re: [syzbot] [mm?] kernel BUG in free_unref_page_prepare From: syzbot To: 42.hyeyoo@gmail.com, akpm@linux-foundation.org, bhe@redhat.com, dyoung@redhat.com, hughd@google.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, lrh2000@pku.edu.cn, mike.kravetz@oracle.com, muchun.song@linux.dev, nathan@kernel.org, ndesaulniers@google.com, pcc@google.com, syzkaller-bugs@googlegroups.com, trix@redhat.com, vgoyal@redhat.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 3a77b282e256d880791a4c5aa10ede13d6417425 Author: Matthew Wilcox (Oracle) Date: Wed Aug 16 15:11:58 2023 +0000 mm: free up a word in the first tail page bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13297387a80000 start commit: 7271b2a53042 Add linux-next specific files for 20230818 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=10a97387a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=17297387a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=1936af09cdef7dd6 dashboard link: https://syzkaller.appspot.com/bug?extid=7423f066b632d9ff23d5 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=112386f3a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15044717a80000 Reported-by: syzbot+7423f066b632d9ff23d5@syzkaller.appspotmail.com Fixes: 3a77b282e256 ("mm: free up a word in the first tail page") For information about bisection process see: https://goo.gl/tpsmEJ#bisection