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isofs: avoid info leak on export

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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>
This commit is contained in:
Mathias Krause 2012-07-12 08:46:54 +02:00 committed by Jan Kara
parent 57b9655d01
commit fe685aabf7
1 changed files with 1 additions and 0 deletions
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1
fs/isofs/export.c
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@ -134,6 +134,7 @@ isofs_export_encode_fh(struct inode *inode,
len = 3; len = 3;
fh32[0] = ei->i_iget5_block; fh32[0] = ei->i_iget5_block;
fh16[2] = (__u16)ei->i_iget5_offset; /* fh16 [sic] */ fh16[2] = (__u16)ei->i_iget5_offset; /* fh16 [sic] */
fh16[3] = 0; /* avoid leaking uninitialized data */
fh32[2] = inode->i_generation; fh32[2] = inode->i_generation;
if (parent) { if (parent) {
struct iso_inode_info *eparent; struct iso_inode_info *eparent;