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-Tag: v2.6.34.15~27
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd50b96209b07d1e650f037dcdcb5ceb862c4445;p=thirdparty%2Fkernel%2Fstable.git

udf: avoid info leak on export

commit 0143fc5e9f6f5aad4764801015bc8d4b4a278200 upstream.

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>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 75816025f95f5..919fa1e5f761a 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1366,6 +1366,7 @@ static int udf_encode_fh(struct dentry *de, __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 (connectable && !S_ISDIR(inode->i_mode)) {