From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 13 Apr 2012 00:32:25 +0000 (-0400)
Subject: ext4: fix endianness breakage in ext4_split_extent_at()
X-Git-Tag: firefly_0821_release~7541^2~1312
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4c88a16263381c429ae0ebdc213e3d1ba5710a75;p=firefly-linux-kernel-4.4.55.git

ext4: fix endianness breakage in ext4_split_extent_at()

commit af1584f570b19b0285e4402a0b54731495d31784 upstream.

->ee_len is __le16, so assigning cpu_to_le32() to it is going to do
Bad Things(tm) on big-endian hosts...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ted Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 7fc10ed7ef45..611647b28a4d 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2846,7 +2846,7 @@ static int ext4_split_extent_at(handle_t *handle,
 		if (err)
 			goto fix_extent_len;
 		/* update the extent length and mark as initialized */
-		ex->ee_len = cpu_to_le32(ee_len);
+		ex->ee_len = cpu_to_le16(ee_len);
 		ext4_ext_try_to_merge(inode, path, ex);
 		err = ext4_ext_dirty(handle, inode, path + depth);
 		goto out;