linux-kernel - [PATCH 2/2] udf: avoid info leak on export

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Message-Id: <1342075615-24683-3-git-send-email-minipli@googlemail.com>
Date:	Thu, 12 Jul 2012 08:46:55 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCH 2/2] 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@...glemail.com>
---
 fs/udf/namei.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 1802417..c31deb3 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) {
-- 
1.7.10.4

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