From: Lukas Czerner <lczerner@redhat.com>
Date: Tue, 28 May 2013 03:32:35 +0000 (-0400)
Subject: ext4: Call ext4_jbd2_file_inode() after zeroing block
X-Git-Tag: accepted/tizen/common/20141203.182822~1813^2~86
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0713ed0cde76438d05849f1537d3aab46e099475;p=platform%2Fkernel%2Flinux-arm64.git

ext4: Call ext4_jbd2_file_inode() after zeroing block

In data=ordered mode we should call ext4_jbd2_file_inode() so that crash
after the truncate transaction has committed does not expose stall data
in the tail of the block.

Thanks Jan Kara for pointing that out.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9b33803..e3d0fb9 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3681,8 +3681,11 @@ int ext4_block_zero_page_range(handle_t *handle,
 	err = 0;
 	if (ext4_should_journal_data(inode)) {
 		err = ext4_handle_dirty_metadata(handle, inode, bh);
-	} else
+	} else {
 		mark_buffer_dirty(bh);
+		if (ext4_test_inode_state(inode, EXT4_STATE_ORDERED_MODE))
+			err = ext4_jbd2_file_inode(handle, inode);
+	}
 
 unlock:
 	unlock_page(page);