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squashfs: fix name reading in squashfs_xattr_get 

Only read potentially matching names into the target buffer, all
obviously non matching names don't need to be read into the
target buffer.

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
This commit is contained in:
Phillip Lougher 2010-05-23 08:27:42 +01:00
parent f6db25a876
commit 5c80f5aa40
1 changed files with 6 additions and 2 deletions
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8
fs/squashfs/xattr.c
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@ -145,8 +145,12 @@ static int squashfs_xattr_get(struct inode *inode, int name_index,
type = le16_to_cpu(entry.type);
prefix = type & SQUASHFS_XATTR_PREFIX_MASK;
err = squashfs_read_metadata(sb, target, &start, &offset,
name_size);
if (prefix == name_index && name_size == name_len)
err = squashfs_read_metadata(sb, target, &start,
&offset, name_size);
else
err = squashfs_read_metadata(sb, NULL, &start,
&offset, name_size);
if (err < 0)
goto failed;