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authorMathias Krause <minipli@googlemail.com>2012-07-12 08:46:54 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-28 12:12:27 -0700
commit19b437682b56a924993979dff408a72e2c5380e6 (patch)
tree963fb370a9a8d8773ca415e98176327b93303a0d
parentb647ebe6e7c171efd2003b1a8d07dcc26e6fa748 (diff)
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@googlemail.com> Signed-off-by: Jan Kara <jack@suse.cz> Cc: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/isofs/export.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index 516eb21895c6..fd88add6ca46 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -135,6 +135,7 @@ isofs_export_encode_fh(struct dentry *dentry,
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 (connectable && !S_ISDIR(inode->i_mode)) {
struct inode *parent;