[ 3.5.y.z extended stable ] Patch "isofs: avoid info leak on export" has been added to staging queue

[Luis Henriques]

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

    isofs: avoid info leak on export

to the linux-3.5.y-queue branch of the 3.5.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-3.5.y-queue

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

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 35aacd262194710f4d0e446ccb71ca84e38a2928 Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli at googlemail.com>
Date: Thu, 12 Jul 2012 08:46:54 +0200
Subject: [PATCH] isofs: avoid info leak on export

commit fe685aabf7c8c9f138e5ea900954d295bf229175 upstream.

For type 1 the parent_offset member in struct isofs_fid gets copied
uninitialized to userland. Fix this by initializing it to 0.

Signed-off-by: Mathias Krause <minipli at googlemail.com>
Signed-off-by: Jan Kara <jack at suse.cz>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 fs/isofs/export.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index 8cf3f97..2b4f235 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -134,6 +134,7 @@ isofs_export_encode_fh(struct inode *inode,
 	len = 3;
 	fh32[0] = ei->i_iget5_block;
  	fh16[2] = (__u16)ei->i_iget5_offset;  /* fh16 [sic] */
+	fh16[3] = 0;  /* avoid leaking uninitialized data */
 	fh32[2] = inode->i_generation;
 	if (parent) {
 		struct iso_inode_info *eparent;
--
1.8.1.2