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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65618C43334 for ; Wed, 8 Jun 2022 00:47:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234542AbiFHAnl (ORCPT ); Tue, 7 Jun 2022 20:43:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1839311AbiFHAC5 (ORCPT ); Tue, 7 Jun 2022 20:02:57 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2ED511CB7F; Tue, 7 Jun 2022 16:52:07 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id l20-20020a17090a409400b001dd2a9d555bso16851699pjg.0; Tue, 07 Jun 2022 16:52:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=b3NZKzwwnS36QL4ucaqxtIuHPEUyyTomuKdcLQyEKAY=; b=Gf7bKdJ2hUOr/LphELuKt2o2il5QdNDO4rPQYRQp+1RKXfjR13N6bKmp5cYllzWRT1 xhWgDv9jhC081rAPWRyoHtai4YiXoOEshYmG98xEi3wfEpFCM2PDCdIuy+YcJ0chYvKT atBYZkLGl8/N43pToDTwRSTpFzFaMaAypJvvAQf+dndtlcYidM4/cRGYnwFcXWEtFEWi Tcg9DoCiNNhHm/4hSnGnujiO9+rEPF9ieyuGMobYFn67e4mR2wStVhet3fN/z1EhPV1t aMmWf/7BmFv9yBtn8Iwp64KBjrIImavp8mV1C3jBkHuJyJPrwDy+v+PnhrbQjoGDC5sB 2t0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=b3NZKzwwnS36QL4ucaqxtIuHPEUyyTomuKdcLQyEKAY=; b=PMNOqZv0gYYje7LKbxAyJDyL+ZlHZfMhp5bM+Gk/YtCO37w6dt/stbuRPAuHeIQxEU W/9lu/ToLXXewh7L2Dp0vLRwzv3rrH3vq7aHe/XbS947qmv4b9OyOVqtmqtUaiNXoMnT 0VC86ADX/oAYxpXqrBh0FK1wBuYB/5BebDWAs10wjvToBJt151B9sM6ZuoHGamjimXMw rdeJTuxFqN88UTCvNS7E4h8+EPKJYxzxiXiDNkjJYNJSMScfxEHhelqBPQC9dcXiOwWi 9qAnrgYpRHQ7b7/V4xZPg5i4FfbQf4Zc1Qs2zXqvXmSbfbK+/iKTsGAhg90+IKW4mdqC rwjA== X-Gm-Message-State: AOAM533xkF3DKvaZ61c7W0Rhme3N5NdJlRfA9RnL3Pf0QGFDFR7ZHWue lk613blWefXo7l5Xb85Ya34= X-Google-Smtp-Source: ABdhPJxccdrile2mSoYxkExBirNwrH/WiEDWbZeQDdUwJ0Lkq9krO4qFXX5rn/DFlb/QY2Iq77CWPw== X-Received: by 2002:a17:902:ce11:b0:167:7d4a:964b with SMTP id k17-20020a170902ce1100b001677d4a964bmr12617889plg.37.1654645927119; Tue, 07 Jun 2022 16:52:07 -0700 (PDT) Received: from google.com ([2620:15c:211:201:f30f:4d03:66e6:b121]) by smtp.gmail.com with ESMTPSA id t9-20020a1709027fc900b00167863f0e68sm4026924plb.237.2022.06.07.16.52.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 16:52:06 -0700 (PDT) Sender: Minchan Kim Date: Tue, 7 Jun 2022 16:52:04 -0700 From: Minchan Kim To: Naresh Kamboju Cc: open list , linux-fsdevel@vger.kernel.org, Linux ARM , "open list:KERNEL SELFTEST FRAMEWORK" , linux-block , regressions@lists.linux.dev, Jens Axboe , Sergey Senozhatsky , Nitin Gupta Subject: Re: qemu-arm: zram: mkfs.ext4 : Unable to handle kernel NULL pointer dereference at virtual address 00000140 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Jun 07, 2022 at 06:51:27AM +0530, Naresh Kamboju wrote: > On Mon, 6 Jun 2022 at 23:06, Minchan Kim wrote: > > > > On Thu, Jun 02, 2022 at 02:19:34PM +0530, Naresh Kamboju wrote: > > > The following kernel crash reported while running selftests: zram: zram.sh > > > test case on qemu-arm with Linux mainline v5.18.0 kernel version. > > > > > > Reported-by: Linux Kernel Functional Testing > > > > > > Started noticing from kernel crash from > > > BAD: git_sha: cdeffe87f790dfd1baa193020411ce9a538446d7 > > > GOOD: git_sha: babf0bb978e3c9fce6c4eba6b744c8754fd43d8e > > > > > > # git log --oneline > > > babf0bb978e3c9fce6c4eba6b744c8754fd43d8e..cdeffe87f790dfd1baa193020411ce9a538446d7 > > > -- drivers/block/ > > > 98931dd95fd4 Merge tag 'mm-stable-2022-05-25' of > > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > > > 6140ae41effe zram: fix Kconfig dependency warning > > > b3fbd58fcbb1 mm: Kconfig: simplify zswap configuration > > > e7be8d1dd983 zram: remove double compression logic > > > a2ad63daa88b VFS: add FMODE_CAN_ODIRECT file flag > > > 30226b69f876 zram: add a huge_idle writeback mode > > > > Hi Nalesh, > > > > Thanks for the reporting the bug! > > > > I locally ran the test in my x86 KVM machine but couldn't reproduce it. > > How is it easy to reproduce? Could you help to bisect it? > > It works on qemu_x86-64 > It is always reproducible in qemu arm32 environment. > > steps to reproduce: > # Please download and use this rootfs and kernel zImage > > rootfs: https://oebuilds.tuxbuild.com/29zhlbEc3EWq2wod9Uy964Bp27q/images/am57xx-evm/rpb-console-image-lkft-am57xx-evm-20220601222434.rootfs.ext4.gz > kernel: https://builds.tuxbuild.com/29zhqJJizU2Y7Ka7ArhryUOrNDC/zImage > > Boot command, > /usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine > virt-2.10,accel=kvm -nographic -net > nic,model=virtio,maaacaddr=BA:DD:AD:CC:09:04 -net tap -m 2048 -monitor > none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw" > -hda rootfs/rpb-console-image-lkft-am57xx-evm-20220601222434.rootfs.ext4 > -m 4096 -smp 2 > > # cd /opt/kselftests/default-in-kernel/zram > # ./zram.sh > > Allow me sometime I will try to bisect this problem. Thanks for sharing the info. I managed to work your rootfs with my local arm build based on the problematic git tip. However, I couldn't suceed to reproduce it. I needed to build zsmalloc/zram built-in instead of modules Is it related? Hmm, Yeah, It would be very helpful if you could help to bisect it. Thanks! === &< ==== create '1' zram device(s) zram modules already loaded, kernel supports zram-control interface [ 936.188541] zram: Added device: zram1 all zram devices (/dev/zram1~1 successfully created set max_comp_streams to zram device(s) The device attribute max_comp_streams was deprecated in 4.7 set disk size to zram device(s) /sys/block/zram1/disksize = '1048576' zram set disksizes: OK set memory limit to zram device(s) [ 936.214438] zram1: detected capacity change from 0 to 2048 /sys/block/zram1/mem_limit = '1M' zram set memory limit: OK make swap with zram device(s) [ 936.608854] Adding 1020k swap on /dev/zram1. Priority:-2 extents:1 across:1020k SS done with /dev/zram1 zram making zram mkswap and swapon: OK zram swapoff: OK zram cleanup [ 937.063416] zram1: detected capacity change from 2048 to 0 [ 937.189223] zram: Removed device: zram1 zram02 : [PASS] root@am57xx-evm:/opt/kselftests/default-in-kernel/zram# uname -r 5.18.0-11934-g54eb8462f21f 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8BFEAC433EF for ; Tue, 7 Jun 2022 23:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lEFZTNfKYBoUy1kAVHJdlDYmSSuZj5EIBmvHYFQ1cjs=; b=AHkBvrHMBAq8QK IiNUB0ajWI5xbfNfRirg9Fw6jbMA4O4+Ip4ZLPS1Ghid3wKf1dJpKVHwBTOo4clZ+z3xu/lXOyAq2 /q1bJK8BxjOXo/+UxJo/43bKNZdYGL0RAAAukdR8TJUOxKKw5CBcTyGm4MDtxflxBG+5HadGgVRBW LDbD4qnlgMNwqr3VKzbldpUj0SNmK+TPHpO1l1YZZwtwYJnqgVJQ0ca27cMy2ZggtxcBT4iLlngzf 4+9uQOgAPWZ3OIqTOeXRRcGBh0rvJJjplheOcN/Hy8ixKKRtjWxQI27+5sHQqAMq3JWPZvwJ6lNaY 2n8vd/TsM2Alg9LGfs6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyizd-00A2Av-Uq; Tue, 07 Jun 2022 23:52:14 +0000 Received: from mail-pj1-x1031.google.com ([2607:f8b0:4864:20::1031]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyiza-00A2AK-53 for linux-arm-kernel@lists.infradead.org; Tue, 07 Jun 2022 23:52:11 +0000 Received: by mail-pj1-x1031.google.com with SMTP id k5-20020a17090a404500b001e8875e6242so6066530pjg.5 for ; Tue, 07 Jun 2022 16:52:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=b3NZKzwwnS36QL4ucaqxtIuHPEUyyTomuKdcLQyEKAY=; b=Gf7bKdJ2hUOr/LphELuKt2o2il5QdNDO4rPQYRQp+1RKXfjR13N6bKmp5cYllzWRT1 xhWgDv9jhC081rAPWRyoHtai4YiXoOEshYmG98xEi3wfEpFCM2PDCdIuy+YcJ0chYvKT atBYZkLGl8/N43pToDTwRSTpFzFaMaAypJvvAQf+dndtlcYidM4/cRGYnwFcXWEtFEWi Tcg9DoCiNNhHm/4hSnGnujiO9+rEPF9ieyuGMobYFn67e4mR2wStVhet3fN/z1EhPV1t aMmWf/7BmFv9yBtn8Iwp64KBjrIImavp8mV1C3jBkHuJyJPrwDy+v+PnhrbQjoGDC5sB 2t0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=b3NZKzwwnS36QL4ucaqxtIuHPEUyyTomuKdcLQyEKAY=; b=ZYh9eopWO5NOQG7GbXQP/v62N0Uhdudcys0I2yypG/gcj3Qkq3aJhzPB+txIsQwfYP v62HSqUPNcRjVE1du0NyKlUt+ovjY2R6ggqXebqzkAcnGnALFy8B++hDUOOTblyFbSHD mFfIHp62rTGV19ZTuTJSpdodLtLXE4vDCkrRgRXYbnkxbfvL4dtltGsrAhRA/To12UwP 68pz2zhTiPKgn1xFv6lGWz5PtFgLPIEndm1SM/w2LKqrW6iiCUbE8k/CpMGpEaGoTR3O q+5qkne1IMDvmSW38ymbeSAnbIRJIE5C0YukFZPTgHfHebTFWV28avB/N4MnbylaiXcS f0eQ== X-Gm-Message-State: AOAM533qyJN0xlF9NKereFVfdqdpZOuCP2sIhC+YrWmVrZQqa8DYbC+1 NuSIItGZfRU2oak87GNjEqxfIaPZOls= X-Google-Smtp-Source: ABdhPJxccdrile2mSoYxkExBirNwrH/WiEDWbZeQDdUwJ0Lkq9krO4qFXX5rn/DFlb/QY2Iq77CWPw== X-Received: by 2002:a17:902:ce11:b0:167:7d4a:964b with SMTP id k17-20020a170902ce1100b001677d4a964bmr12617889plg.37.1654645927119; Tue, 07 Jun 2022 16:52:07 -0700 (PDT) Received: from google.com ([2620:15c:211:201:f30f:4d03:66e6:b121]) by smtp.gmail.com with ESMTPSA id t9-20020a1709027fc900b00167863f0e68sm4026924plb.237.2022.06.07.16.52.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 16:52:06 -0700 (PDT) Date: Tue, 7 Jun 2022 16:52:04 -0700 From: Minchan Kim To: Naresh Kamboju Cc: open list , linux-fsdevel@vger.kernel.org, Linux ARM , "open list:KERNEL SELFTEST FRAMEWORK" , linux-block , regressions@lists.linux.dev, Jens Axboe , Sergey Senozhatsky , Nitin Gupta Subject: Re: qemu-arm: zram: mkfs.ext4 : Unable to handle kernel NULL pointer dereference at virtual address 00000140 Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220607_165210_253704_A71B7F40 X-CRM114-Status: GOOD ( 21.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jun 07, 2022 at 06:51:27AM +0530, Naresh Kamboju wrote: > On Mon, 6 Jun 2022 at 23:06, Minchan Kim wrote: > > > > On Thu, Jun 02, 2022 at 02:19:34PM +0530, Naresh Kamboju wrote: > > > The following kernel crash reported while running selftests: zram: zram.sh > > > test case on qemu-arm with Linux mainline v5.18.0 kernel version. > > > > > > Reported-by: Linux Kernel Functional Testing > > > > > > Started noticing from kernel crash from > > > BAD: git_sha: cdeffe87f790dfd1baa193020411ce9a538446d7 > > > GOOD: git_sha: babf0bb978e3c9fce6c4eba6b744c8754fd43d8e > > > > > > # git log --oneline > > > babf0bb978e3c9fce6c4eba6b744c8754fd43d8e..cdeffe87f790dfd1baa193020411ce9a538446d7 > > > -- drivers/block/ > > > 98931dd95fd4 Merge tag 'mm-stable-2022-05-25' of > > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > > > 6140ae41effe zram: fix Kconfig dependency warning > > > b3fbd58fcbb1 mm: Kconfig: simplify zswap configuration > > > e7be8d1dd983 zram: remove double compression logic > > > a2ad63daa88b VFS: add FMODE_CAN_ODIRECT file flag > > > 30226b69f876 zram: add a huge_idle writeback mode > > > > Hi Nalesh, > > > > Thanks for the reporting the bug! > > > > I locally ran the test in my x86 KVM machine but couldn't reproduce it. > > How is it easy to reproduce? Could you help to bisect it? > > It works on qemu_x86-64 > It is always reproducible in qemu arm32 environment. > > steps to reproduce: > # Please download and use this rootfs and kernel zImage > > rootfs: https://oebuilds.tuxbuild.com/29zhlbEc3EWq2wod9Uy964Bp27q/images/am57xx-evm/rpb-console-image-lkft-am57xx-evm-20220601222434.rootfs.ext4.gz > kernel: https://builds.tuxbuild.com/29zhqJJizU2Y7Ka7ArhryUOrNDC/zImage > > Boot command, > /usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine > virt-2.10,accel=kvm -nographic -net > nic,model=virtio,maaacaddr=BA:DD:AD:CC:09:04 -net tap -m 2048 -monitor > none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw" > -hda rootfs/rpb-console-image-lkft-am57xx-evm-20220601222434.rootfs.ext4 > -m 4096 -smp 2 > > # cd /opt/kselftests/default-in-kernel/zram > # ./zram.sh > > Allow me sometime I will try to bisect this problem. Thanks for sharing the info. I managed to work your rootfs with my local arm build based on the problematic git tip. However, I couldn't suceed to reproduce it. I needed to build zsmalloc/zram built-in instead of modules Is it related? Hmm, Yeah, It would be very helpful if you could help to bisect it. Thanks! === &< ==== create '1' zram device(s) zram modules already loaded, kernel supports zram-control interface [ 936.188541] zram: Added device: zram1 all zram devices (/dev/zram1~1 successfully created set max_comp_streams to zram device(s) The device attribute max_comp_streams was deprecated in 4.7 set disk size to zram device(s) /sys/block/zram1/disksize = '1048576' zram set disksizes: OK set memory limit to zram device(s) [ 936.214438] zram1: detected capacity change from 0 to 2048 /sys/block/zram1/mem_limit = '1M' zram set memory limit: OK make swap with zram device(s) [ 936.608854] Adding 1020k swap on /dev/zram1. Priority:-2 extents:1 across:1020k SS done with /dev/zram1 zram making zram mkswap and swapon: OK zram swapoff: OK zram cleanup [ 937.063416] zram1: detected capacity change from 2048 to 0 [ 937.189223] zram: Removed device: zram1 zram02 : [PASS] root@am57xx-evm:/opt/kselftests/default-in-kernel/zram# uname -r 5.18.0-11934-g54eb8462f21f _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel