From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Thu, 26 Nov 2015 20:20:50 +0000 (-0500)
Subject: ext4: fix an endianness bug in ext4_encrypted_follow_link()
X-Git-Tag: v4.3.6~48
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5508f03599af61c1511cc09419b282cbc9a1a52;p=thirdparty%2Fkernel%2Fstable.git

ext4: fix an endianness bug in ext4_encrypted_follow_link()

commit 5a1c7f47da9b32d0671e776b0f388095b7f91e2e upstream.

applying le32_to_cpu() to 16bit value is a bad idea...

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

diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index c677f2c1044b6..3627fd7cf4a02 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -52,7 +52,7 @@ static const char *ext4_encrypted_follow_link(struct dentry *dentry, void **cook
 	/* Symlink is encrypted */
 	sd = (struct ext4_encrypted_symlink_data *)caddr;
 	cstr.name = sd->encrypted_path;
-	cstr.len  = le32_to_cpu(sd->len);
+	cstr.len  = le16_to_cpu(sd->len);
 	if ((cstr.len +
 	     sizeof(struct ext4_encrypted_symlink_data) - 1) >
 	    max_size) {