fs/adfs: newdir: improve directory validation

Check that the lastmask and reserved fields are all zero, as per the
documentation.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 196706d581bf6d9bed9e0caadd3e1be023a72aaf..ebe8616ee533eb5a4100ce9e11e57aebd12cd1fa 100644 (file)
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -127,6 +127,7 @@ static int adfs_f_validate(struct adfs_dir *dir)
        struct adfs_newdirtail *tail = dir->newtail;
 
        if (head->startmasseq != tail->endmasseq ||
+           tail->dirlastmask || tail->reserved[0] || tail->reserved[1] ||
            (memcmp(&head->startname, "Nick", 4) &&
             memcmp(&head->startname, "Hugo", 4)) ||
            memcmp(&head->startname, &tail->endname, 4) ||