systemd/0004-util-refuse-considering-UID-0xFFFF-and-0xFFFFFFFF-va.patch

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From 306a55c86360a7ae7b2509771d5ea6ab0d166d85 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Sun, 29 Jun 2014 22:15:33 +0200
Subject: [PATCH] util: refuse considering UID 0xFFFF and 0xFFFFFFFF valid
---
src/shared/util.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git src/shared/util.c src/shared/util.c
index e7ff0f8..1709bb7 100644
--- src/shared/util.c
+++ src/shared/util.c
@@ -280,6 +280,14 @@ int parse_uid(const char *s, uid_t* ret_uid) {
if ((unsigned long) uid != ul)
return -ERANGE;
+ /* Some libc APIs use (uid_t) -1 as special placeholder */
+ if (uid == (uid_t) 0xFFFFFFFF)
+ return -EINVAL;
+
+ /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */
+ if (uid == (uid_t) 0xFFFF)
+ return -EINVAL;
+
*ret_uid = uid;
return 0;
}
--
1.7.9.2