xenstored: handle unlikely failure better in ask_parents

Coverity-ID: 1055277
Signed-off-by: Matthew Daley <mattjd@gmail.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
index a2cf2a66a3e352099dd37f3ac4c3c4fdb10e4663..0f8ba64499d39d57183c96d4e35b0a254befe885 100644 (file)
--- a/tools/xenstore/xenstored_core.c
+++ b/tools/xenstore/xenstored_core.c
@@ -523,8 +523,10 @@ static enum xs_perm_type ask_parents(struct connection *conn, const char *name)
        } while (!streq(name, "/"));
 
        /* No permission at root?  We're in trouble. */
-       if (!node)
+       if (!node) {
                corrupt(conn, "No permissions file at root");
+               return XS_PERM_NONE;
+       }
 
        return perm_for_conn(conn, node->perms, node->num_perms);
 }