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[2620:137:e000::1:20]) by mx.google.com with ESMTP id q1-20020a170902dac100b001a92694cbd6si34932361plx.600.2023.05.03.02.30.58; Wed, 03 May 2023 02:31:12 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229554AbjECJXW (ORCPT + 99 others); Wed, 3 May 2023 05:23:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbjECJXV (ORCPT ); Wed, 3 May 2023 05:23:21 -0400 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0266D44AD for ; Wed, 3 May 2023 02:23:20 -0700 (PDT) Received: by mail-il1-f197.google.com with SMTP id e9e14a558f8ab-331027514f6so20546995ab.0 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=P8vcKiYLj7gHAfapeq3MPlQhqVG45iVkInbi5ObtIBHP4rSXylx7mH2C/8ykos9+YH d+mJ0tJHaLyCi7QVGhH3Nb8wVaUEP3QAMVaQMcQJ73aXx84SvSBZQr4D+RHy5CIPe59+ 8NX2sAHFu+UbIbJVq8UecseT2Ge0ROnWD795Y0HrFyGhGd0t5VclS5jKfZEOJaU/+Ohi dAh07KA4ipFwHxnzFpx7ioD7CDC2lrOUpF3kF8PfjzwWM7Gvqrcsb49bTWY5wwv7G8mN EynsZPVI3BfpwTsNjihTW33argxraW7bGvrOyvHekjixyH7cNIdiQh9Ml5cO98wkHULE FTVA== X-Gm-Message-State: AC+VfDwhoD5HRVZQeJ1yHiRtbsAH776IQvB2RpE7y8HlZ+re10/wN/vR naX2MqWo1hOY3rltCfdgtlDZ2izbVUtE4ejQ/qIA8tczD+Fz 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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