From: Murphy Zhou <jencce.kernel@gmail.com>
To: Ritesh Harjani <riteshh@linux.ibm.com>
Cc: linux-ext4@vger.kernel.org, jack@suse.cz, tytso@mit.edu,
adilger@dilger.ca, darrick.wong@oracle.com, hch@infradead.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
Dan Carpenter <dan.carpenter@oracle.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Murphy Zhou <jencce.kernel@gmail.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Amir Goldstein <amir73il@gmail.com>,
linux-fsdevel@vger.kernel.org, linux-unionfs@vger.kernel.org
Subject: Re: [PATCH 0/5] ext4/overlayfs: fiemap related fixes
Date: Tue, 19 May 2020 10:43:11 +0800 [thread overview]
Message-ID: <20200519024311.7bkxi2fkxboon2ig@xzhoux.usersys.redhat.com> (raw)
In-Reply-To: <cover.1587555962.git.riteshh@linux.ibm.com>
On Thu, Apr 23, 2020 at 04:17:52PM +0530, Ritesh Harjani wrote:
> Hello All,
>
> Here are some changes, which as I understand, takes the right approach in fixing
> the offset/length bounds check problem reported in threads [1]-[2].
> These warnings in iomap_apply/ext4 path are reported after ext4_fiemap()
> was moved to use iomap framework and when overlayfs is mounted on top of ext4.
> Though the issues were identified after ext4 moved to iomap framework, but
> these changes tries to fix the problem which are anyways present in current code
> irrespective of ext4 using iomap framework for fiemap or not.
Ping?
>
> Patch 1 & 4 commit msg may give more details of the problem.
>
> Tests done
> ==========
> 1. Tested xfstest-suite with "-g quick" & "-overlay -g quick" configuration
> on a 4k blocksize on x86 & Power. There were no new failures reported
> due to these changes.
> 2. Tested syzcaller reported problem with this change. [1]
> 3. Tested below change which was reported by Murphy. [2]
> The minimal reproducer is:
> -------------------------------------
> fallocate -l 256M test.img
> mkfs.ext4 -Fq -b 4096 -I 256 test.img
> mkdir -p test
> mount -o loop test.img test || exit
> pushd test
> rm -rf l u w m
> mkdir -p l u w m
> mount -t overlay -o lowerdir=l,upperdir=u,workdir=w overlay m || exit
> xfs_io -f -c "pwrite 0 4096" -c "fiemap" m/tf
> umount m
> rm -rf l u w m
> popd
> umount -d test
> rm -rf test test.img
> -------------------------------------
>
> Comments/feedback are much welcome!!
>
> References
> ==========
> [1]: https://lkml.org/lkml/2020/4/11/46
> [2]: https://patchwork.ozlabs.org/project/linux-ext4/patch/20200418233231.z767yvfiupy7hwgp@xzhoux.usersys.redhat.com/
>
>
> Ritesh Harjani (5):
> ext4: Fix EXT4_MAX_LOGICAL_BLOCK macro
> ext4: Rename fiemap_check_ranges() to make it ext4 specific
> vfs: EXPORT_SYMBOL for fiemap_check_ranges()
> overlayfs: Check for range bounds before calling i_op->fiemap()
> ext4: Get rid of ext4_fiemap_check_ranges
>
> fs/ext4/ext4.h | 2 +-
> fs/ext4/ioctl.c | 23 -----------------------
> fs/ioctl.c | 5 +++--
> fs/overlayfs/inode.c | 7 ++++++-
> include/linux/fs.h | 2 ++
> 5 files changed, 12 insertions(+), 27 deletions(-)
>
> --
> 2.21.0
>
--
Murphy
next prev parent reply other threads:[~2020-05-19 2:43 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 10:47 [PATCH 0/5] ext4/overlayfs: fiemap related fixes Ritesh Harjani
2020-04-23 10:47 ` [PATCH 1/5] ext4: Fix EXT4_MAX_LOGICAL_BLOCK macro Ritesh Harjani
2020-04-23 11:16 ` Jan Kara
2020-04-23 10:47 ` [PATCH 2/5] ext4: Rename fiemap_check_ranges() to make it ext4 specific Ritesh Harjani
2020-04-23 11:17 ` Jan Kara
2020-04-23 10:47 ` [PATCH 3/5] vfs: EXPORT_SYMBOL for fiemap_check_ranges() Ritesh Harjani
2020-04-23 11:18 ` Jan Kara
2020-04-23 10:47 ` [PATCH 4/5] overlayfs: Check for range bounds before calling i_op->fiemap() Ritesh Harjani
2020-04-23 11:19 ` Jan Kara
2020-04-25 8:54 ` Amir Goldstein
2020-04-23 10:47 ` [PATCH 5/5] ext4: Get rid of ext4_fiemap_check_ranges Ritesh Harjani
2020-04-23 11:20 ` Jan Kara
2020-04-24 10:11 ` [PATCH 0/5] ext4/overlayfs: fiemap related fixes Christoph Hellwig
2020-04-24 23:20 ` Ritesh Harjani
2020-04-25 9:11 ` Amir Goldstein
2020-04-25 9:43 ` Christoph Hellwig
2020-04-25 10:49 ` Amir Goldstein
2020-04-25 11:14 ` Ritesh Harjani
2020-04-27 6:28 ` Christoph Hellwig
2020-04-27 10:15 ` Amir Goldstein
2020-04-27 10:38 ` Christoph Hellwig
2020-04-25 17:32 ` Andreas Dilger
2020-04-27 6:42 ` Christoph Hellwig
2020-04-25 9:44 ` Ritesh Harjani
2020-05-19 2:43 ` Murphy Zhou [this message]
2020-05-21 6:08 ` Ritesh Harjani
2020-05-22 4:56 ` Murphy Zhou
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