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util: refuse considering UID 0xFFFF and 0xFFFFFFFF valid

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This commit is contained in:
Lennart Poettering 2014-06-29 22:15:33 +02:00
parent 21236ab510
commit 306a55c863
1 changed files with 8 additions and 0 deletions
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8
src/shared/util.c
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@ -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 32bit -1 too */
if (uid == (uid_t) 0xFFFF)
return -EINVAL;
*ret_uid = uid;
return 0;
}