This is a note to let you know that I've just added the patch titled
ocfs2: fix zero out valid data
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ocfs2-fix-zero-out-valid-data.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f267aeb6dea5e468793e5b8eb6a9c72c0020d418 Mon Sep 17 00:00:00 2001
From: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Date: Thu, 29 Jul 2021 14:53:38 -0700
Subject: ocfs2: fix zero out valid data
From: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
commit f267aeb6dea5e468793e5b8eb6a9c72c0020d418 upstream.
If append-dio feature is enabled, direct-io write and fallocate could
run in parallel to extend file size, fallocate used "orig_isize" to
record i_size before taking "ip_alloc_sem", when
ocfs2_zeroout_partial_cluster() zeroout EOF blocks, i_size maybe already
extended by ocfs2_dio_end_io_write(), that will cause valid data zeroed
out.
Link: https://lkml.kernel.org/r/20210722054923.24389-1-junxiao.bi@xxxxxxxxxx
Fixes: 6bba4471f0cc ("ocfs2: fix data corruption by fallocate")
Signed-off-by: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1939,7 +1939,6 @@ static int __ocfs2_change_file_space(str
goto out_inode_unlock;
}
- orig_isize = i_size_read(inode);
switch (sr->l_whence) {
case 0: /*SEEK_SET*/
break;
@@ -1947,7 +1946,7 @@ static int __ocfs2_change_file_space(str
sr->l_start += f_pos;
break;
case 2: /*SEEK_END*/
- sr->l_start += orig_isize;
+ sr->l_start += i_size_read(inode);
break;
default:
ret = -EINVAL;
@@ -2002,6 +2001,7 @@ static int __ocfs2_change_file_space(str
ret = -EINVAL;
}
+ orig_isize = i_size_read(inode);
/* zeroout eof blocks in the cluster. */
if (!ret && change_size && orig_isize < size) {
ret = ocfs2_zeroout_partial_cluster(inode, orig_isize,
Patches currently in stable-queue which might be from junxiao.bi@xxxxxxxxxx are
queue-4.4/ocfs2-issue-zeroout-to-eof-blocks.patch
queue-4.4/ocfs2-fix-zero-out-valid-data.patch
