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 4F1C3C77B7F for ; Wed, 3 May 2023 09:23:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D16DB6B0071; Wed, 3 May 2023 05:23:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CC3336B0072; Wed, 3 May 2023 05:23:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BFF4E6B0074; Wed, 3 May 2023 05:23:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) by kanga.kvack.org (Postfix) with ESMTP id AB4566B0071 for ; Wed, 3 May 2023 05:23:19 -0400 (EDT) Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-32b65428489so34121865ab.1 for ; Wed, 03 May 2023 02:23:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683105799; x=1685697799; 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=sGQwBgpI0bqdgO8pKEEKbKv8+LeoHbpWth2gSQz7m8c=; b=Dx54EbyLCEkrZd7Wh/hjB8BskU2fq9QZBwPteodcrMhbmLS7ycZjXn9J895Ig24b79 1g4of8sH9+D7nt2JkB0DTm4QqYuTKnWiikawJ/L9F4IU1POFdIZELIyIz4GxuzRkCxnt SjQnMal0EHCJrLXz0YnbBv2cRCJUxkuGDPiFhH6l4wJh8alXYQc/Ecu3MI6m3wTF6Ek/ mzSWc+fMbWIf6Xxr/yG1U48J2E3Q2iq4t7BTM/WkwhGor2nacdi8yxbH+YGzxvixUVj0 zMGGvGl/y9oTlJjRtwJmE6dI4C3DcPKuzH9TWTkbPg8kAvF8vMFH2BqGIRQvdEpdu1e2 3frA== X-Gm-Message-State: AC+VfDwwWk3+/v1IJcErXja6K7kzGw+QvqDyw1ApkwaVMBVYhKwc77TP WPAn/O9qrv9DX+rWtDqmuo3xPCc8CjVsA4UeVty+R/cjI//X X-Google-Smtp-Source: ACHHUZ5aG/XfDHqoKqO+ew2JWIPDDza1z+e6Rp2DamFuAlgepSexYCvFh5GJosvlwf7Pk/iL0j6gaCeA1MFSQp8enMVfNw4U3owM MIME-Version: 1.0 X-Received: by 2002:a92:d98f:0:b0:331:2d3a:2cf5 with SMTP id r15-20020a92d98f000000b003312d3a2cf5mr3245587iln.2.1683105799342; Wed, 03 May 2023 02:23:19 -0700 (PDT) Date: Wed, 03 May 2023 02:23:19 -0700 In-Reply-To: <00000000000090900c05fa656913@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004a34a305fac69bcb@google.com> Subject: Re: [syzbot] [mm?] [udf?] KASAN: null-ptr-deref Read in filemap_fault From: syzbot To: akpm@linux-foundation.org, hch@lst.de, jack@suse.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" 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 66dabbb65d673aef40dd17bf62c042be8f6d4a4b Author: Christoph Hellwig Date: Tue Mar 7 14:34:10 2023 +0000 mm: return an ERR_PTR from __filemap_get_folio bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15220608280000 start commit: 865fdb08197e Merge tag 'input-for-v6.4-rc0' of git://git.k.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=17220608280000 console output: https://syzkaller.appspot.com/x/log.txt?x=13220608280000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1c8518c09009bad dashboard link: https://syzkaller.appspot.com/bug?extid=48011b86c8ea329af1b9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137594c4280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10cfd602280000 Reported-by: syzbot+48011b86c8ea329af1b9@syzkaller.appspotmail.com Fixes: 66dabbb65d67 ("mm: return an ERR_PTR from __filemap_get_folio") For information about bisection process see: https://goo.gl/tpsmEJ#bisection