From: Mathias Krause <minipli@googlemail.com>
Date: Thu, 12 Jul 2012 06:46:55 +0000 (+0200)
Subject: udf: avoid info leak on export
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0143fc5e9f6f5aad4764801015bc8d4b4a278200;p=deliverable%2Flinux.git

udf: avoid info leak on export

For type 0x51 the udf.parent_partref member in struct fid gets copied
uninitialized to userland. Fix this by initializing it to 0.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 18024178ac4c..c31deb382afd 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1279,6 +1279,7 @@ static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
 	*lenp = 3;
 	fid->udf.block = location.logicalBlockNum;
 	fid->udf.partref = location.partitionReferenceNum;
+	fid->udf.parent_partref = 0;
 	fid->udf.generation = inode->i_generation;
 
 	if (parent) {