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[2620:137:e000::1:20]) by mx.google.com with ESMTP id v187-20020a632fc4000000b0050f55427e3dsi2547619pgv.701.2023.04.20.13.44.31; Thu, 20 Apr 2023 13:44:43 -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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231944AbjDTUhD convert rfc822-to-8bit (ORCPT + 99 others); Thu, 20 Apr 2023 16:37:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231166AbjDTUhB (ORCPT ); Thu, 20 Apr 2023 16:37:01 -0400 Received: from lithops.sigma-star.at (lithops.sigma-star.at [195.201.40.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D8BF1FFB for ; Thu, 20 Apr 2023 13:36:59 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id 29B8F63CC190; Thu, 20 Apr 2023 22:36:57 +0200 (CEST) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id NbvsokkF7ZlM; Thu, 20 Apr 2023 22:36:56 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id 0B8976418F2B; Thu, 20 Apr 2023 22:36:56 +0200 (CEST) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id DRD9jo1tEAsD; Thu, 20 Apr 2023 22:36:55 +0200 (CEST) Received: from lithops.sigma-star.at (lithops.sigma-star.at [195.201.40.130]) by lithops.sigma-star.at (Postfix) with ESMTP id E189363CC190; Thu, 20 Apr 2023 22:36:55 +0200 (CEST) Date: Thu, 20 Apr 2023 22:36:55 +0200 (CEST) From: Richard Weinberger To: Yu Hao Cc: chengzhihao1 , Miquel Raynal , Vignesh Raghavendra , linux-mtd , linux-kernel Message-ID: <412779912.228444.1682023015809.JavaMail.zimbra@nod.at> In-Reply-To: References: <687864524.118195.1681799447034.JavaMail.zimbra@nod.at> <977347543.226888.1682011999468.JavaMail.zimbra@nod.at> Subject: Re: BUG: divide error in ubi_attach_mtd_dev MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Originating-IP: [195.201.40.130] X-Mailer: Zimbra 8.8.12_GA_3807 (ZimbraWebClient - FF97 (Linux)/8.8.12_GA_3809) Thread-Topic: divide error in ubi_attach_mtd_dev Thread-Index: f8YvMDTSYLQx33FOZb2oMatq86v3fQ== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, T_SCC_BODY_TEXT_LINE,T_SPF_PERMERROR autolearn=ham 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 ----- Ursprüngliche Mail ----- >> Can you please share the qemu command line? > qemu-system-x86_64 -m 2G -smp 2 -kernel > /home/test/Workspace/SyzGen/linux-distro/linux-6.2-debug/arch/x86/boot/bzImage > -append “console=ttyS0 root=/dev/sda net.ifnames=0” -hda > /home/test/Workspace/SyzGen/linux-distro/image/stretch.img -chardev > socket,id=SOCKSYZ,server=on,nowait,host=localhost,port=54640 -mon > chardev=SOCKSYZ,mode=control -device virtio-rng-pci -device > e1000,netdev=net0 -netdev > user,id=net0,restrict=on,hostfwd=tcp:127.0.0.1:11760-:22 -display none > -serial stdio -cpu host,migratable=off -no-reboot -name VM -snapshot > -enable-kvm > >> Within Linux you can query /proc/mtd or /sys/class/mtd/ >> to get infos about the MTD in question. >> > > Thanks for the hints. We find that this is a “mtdram test device”. > > root@syzkaller:~# cat /proc/mtd > dev: size erasesize name > mtd0: 00020000 00001000 “mtdram test device” Hmm, mtdram should be fine, erasesize is not zero. Thanks, //richard