openwrt-xburst/package/network/services/dropbear/patches/110-change_user.patch

--- a/svr-chansession.c
+++ b/svr-chansession.c
@@ -884,12 +884,12 @@ static void execchild(void *user_data) {
 	/* We can only change uid/gid as root ... */
 	if (getuid() == 0) {
 
-		if ((setgid(ses.authstate.pw_gid) < 0) ||
+		if ((ses.authstate.pw_gid != 0) && ((setgid(ses.authstate.pw_gid) < 0) ||
 			(initgroups(ses.authstate.pw_name, 
-						ses.authstate.pw_gid) < 0)) {
+						ses.authstate.pw_gid) < 0))) {
 			dropbear_exit("Error changing user group");
 		}
-		if (setuid(ses.authstate.pw_uid) < 0) {
+		if ((ses.authstate.pw_uid != 0) && (setuid(ses.authstate.pw_uid) < 0)) {
 			dropbear_exit("Error changing user");
 		}
 	} else {