diff options
| author | Junxiao Bi <junxiao.bi@oracle.com> | 2021-07-29 14:53:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-04 12:23:45 +0200 |
| commit | 4c97ed4332beba3ed26b2f14461d3cc469c7f27e (patch) | |
| tree | f3c6932d9573111f477a239943f34748c875804d | |
| parent | ce1fd5a2262265a8be09b861340a79683cc1f7cf (diff) | |
| download | linux-stable-4c97ed4332beba3ed26b2f14461d3cc469c7f27e.tar.gz linux-stable-4c97ed4332beba3ed26b2f14461d3cc469c7f27e.tar.bz2 linux-stable-4c97ed4332beba3ed26b2f14461d3cc469c7f27e.zip | |
ocfs2: fix zero out valid data
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@oracle.com
Fixes: 6bba4471f0cc ("ocfs2: fix data corruption by fallocate")
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ocfs2/file.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 94df697e2638..c1a46061f9c0 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1943,7 +1943,6 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode, goto out_inode_unlock; } - orig_isize = i_size_read(inode); switch (sr->l_whence) { case 0: /*SEEK_SET*/ break; @@ -1951,7 +1950,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode, 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; @@ -2006,6 +2005,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode, 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, |