diff options
| author | Jan Kara <jack@suse.cz> | 2019-05-24 06:07:08 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 16:46:00 +0300 |
| commit | 5220582c427bb377c8c4b28ed911f545e7da859d (patch) | |
| tree | dcdd9cab37becfe9a42b166c269f92075a4d8df6 /fs | |
| parent | 71e430fd593b2627baaa67e808ff27131b1418e0 (diff) | |
| download | linux-5220582c427bb377c8c4b28ed911f545e7da859d.tar.xz | |
ext4: wait for outstanding dio during truncate in nojournal mode
commit 82a25b027ca48d7ef197295846b352345853dfa8 upstream.
We didn't wait for outstanding direct IO during truncate in nojournal
mode (as we skip orphan handling in that case). This can lead to fs
corruption or stale data exposure if truncate ends up freeing blocks
and these get reallocated before direct IO finishes. Fix the condition
determining whether the wait is necessary.
CC: stable@vger.kernel.org
Fixes: 1c9114f9c0f1 ("ext4: serialize unlocked dio reads with truncate")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/inode.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 82dee8addb4b..05dc5a4ba481 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5601,20 +5601,17 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) goto err_out; } } - if (!shrink) + if (!shrink) { pagecache_isize_extended(inode, oldsize, inode->i_size); - - /* - * Blocks are going to be removed from the inode. Wait - * for dio in flight. Temporarily disable - * dioread_nolock to prevent livelock. - */ - if (orphan) { - if (!ext4_should_journal_data(inode)) { - inode_dio_wait(inode); - } else - ext4_wait_for_tail_page_commit(inode); + } else { + /* + * Blocks are going to be removed from the inode. Wait + * for dio in flight. + */ + inode_dio_wait(inode); } + if (orphan && ext4_should_journal_data(inode)) + ext4_wait_for_tail_page_commit(inode); down_write(&EXT4_I(inode)->i_mmap_sem); rc = ext4_break_layouts(inode); |