audit: make audit_compare_dname_path use parent_len helper

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index ff4011c..d705eb1 100644 (file)
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1332,32 +1332,19 @@ int parent_len(const char *path)
  * return of 0 indicates a match. */
 int audit_compare_dname_path(const char *dname, const char *path)
 {
-       int dlen, plen;
+       int dlen, pathlen, parentlen;
        const char *p;
 
-       if (!dname || !path)
-               return 1;
-
        dlen = strlen(dname);
-       plen = strlen(path);
-       if (plen < dlen)
+       pathlen = strlen(path);
+       if (pathlen < dlen)
                return 1;
 
-       /* disregard trailing slashes */
-       p = path + plen - 1;
-       while ((*p == '/') && (p > path))
-               p--;
-
-       /* find last path component */
-       p = p - dlen + 1;
-       if (p < path)
+       parentlen = parent_len(path);
+       if (pathlen - parentlen != dlen)
                return 1;
-       else if (p > path) {
-               if (*--p != '/')
-                       return 1;
-               else
-                       p++;
-       }
+
+       p = path + parentlen;
 
        return strncmp(p, dname, dlen);
 }