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[062/150] isofs: avoid info leak on export

Message ID 1364311249-14454-63-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques March 26, 2013, 3:19 p.m. UTC 
3.5.7.9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mathias Krause <minipli@googlemail.com>

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

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;