From: Theodore Ts'o <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: linux-ext4@vger.kernel.org,
Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] ext4: Fix zeroing of page during writeback
Date: Mon, 26 May 2014 12:37:59 -0400 [thread overview]
Message-ID: <20140526163759.GL22284@thunk.org> (raw)
In-Reply-To: <1400771203-24260-1-git-send-email-jack@suse.cz>
On Thu, May 22, 2014 at 05:06:43PM +0200, Jan Kara wrote:
> Tail of a page straddling inode size must be zeroed when being written
> out due to POSIX requirement that modifications of mmaped page beyond
> inode size must not be written to the file. ext4_bio_write_page() did
> this only for blocks fully beyond inode size but didn't properly zero
> blocks partially beyond inode size. Fix this.
>
> The problem has been uncovered by mmap_11-4 test in openposix test suite
> (part of LTP).
>
> Reported-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
> Fixes: 5a0dc7365c240
> Fixes: bd2d0210cf22f
> CC: stable@vger.kernel.org
> Signed-off-by: Jan Kara <jack@suse.cz>
Applied, thanks.
- Ted
next prev parent reply other threads:[~2014-05-26 16:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-22 15:06 [PATCH] ext4: Fix zeroing of page during writeback Jan Kara
2014-05-26 16:37 ` Theodore Ts'o [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-10-10 14:23 [Cluster-devel] [PATCH 0/2 v2] Fix data corruption when blocksize < pagesize for mmapped data Jan Kara
2014-10-10 14:23 ` [PATCH] ext4: Fix zeroing of page during writeback Jan Kara
2014-10-10 14:23 ` Jan Kara
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140526163759.GL22284@thunk.org \
--to=tytso@mit.edu \
--cc=jack@suse.cz \
--cc=linux-ext4@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=wangxg.fnst@cn.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.