[3.8.y.z extended stable] Patch "ext4: use i_size_read in ext4_unaligned_aio()" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ext4: use i_size_read in ext4_unaligned_aio()

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.24.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From b8299364ce824b054781298ee0826e87c470c4b8 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso at mit.edu>
Date: Sat, 12 Apr 2014 12:45:25 -0400
Subject: ext4: use i_size_read in ext4_unaligned_aio()

commit 6e6358fc3c3c862bfe9a5bc029d3f8ce43dc9765 upstream.

We haven't taken i_mutex yet, so we need to use i_size_read().

Signed-off-by: "Theodore Ts'o" <tytso at mit.edu>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 fs/ext4/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 216a633..7cf5b11 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -81,7 +81,7 @@ ext4_unaligned_aio(struct inode *inode, const struct iovec *iov,
 	size_t count = iov_length(iov, nr_segs);
 	loff_t final_size = pos + count;

-	if (pos >= inode->i_size)
+	if (pos >= i_size_read(inode))
 		return 0;

 	if ((pos & blockmask) || (final_size & blockmask))
--
1.9.1