From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3F10EEA5 for ; Wed, 3 May 2023 09:23:21 +0000 (UTC) Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 061EA49CF for ; Wed, 3 May 2023 02:23:20 -0700 (PDT) Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-32b65428489so34121855ab.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=IZ3FEkRfOExshIENXLqJ1Ku5HAlJ/gEUByAzqyH/HDbAOxbO/S2pji8zZyIOH1YHZi RGtW/h9sBJsxIlEJsp9hwJbJx7zZlrvtjWm/6nMxEcEOwbZdiC8TtRpJNqwZgT6Yektx 9ZNqyxZisr2hQfuDhCjMqCRlRDYkbnLQTkMHz0/ADlIdYPD2ZDprfteLOmGg4y5O2KvF GbxKNbSDaPM74KTuKEsO4q3GDFSRs+vbEV/WZ2+0G7oXx2/xZyUfchASRy1pr+NQhBYm LiQn9JXmbqjZmpOO7DhThXUiEz8GYO47ZLU1sjCXZPctHkJPv+7BgivyytT8qtAMtPmO Ycrw== X-Gm-Message-State: AC+VfDyeBKMEtpDY3/ThtB/+xFSIJqa/xn3ywG7567h+XYOpQH6M/+oI r7Dbl6rypqDNPbnMCPK6KYFhV/zez/j8m3AxAHMrY4G8YaPJ X-Google-Smtp-Source: ACHHUZ5aG/XfDHqoKqO+ew2JWIPDDza1z+e6Rp2DamFuAlgepSexYCvFh5GJosvlwf7Pk/iL0j6gaCeA1MFSQp8enMVfNw4U3owM Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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