diff options
Diffstat (limited to 'src/basic/user-util.c')
| -rw-r--r-- | src/basic/user-util.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/src/basic/user-util.c b/src/basic/user-util.c index b5e6ce8a8a..7e6c4c645d 100644 --- a/src/basic/user-util.c +++ b/src/basic/user-util.c @@ -138,11 +138,19 @@ int get_user_creds( if (!p) return errno > 0 ? -errno : -ESRCH; - if (uid) + if (uid) { + if (!uid_is_valid(p->pw_uid)) + return -EBADMSG; + *uid = p->pw_uid; + } + + if (gid) { + if (!gid_is_valid(p->pw_gid)) + return -EBADMSG; - if (gid) *gid = p->pw_gid; + } if (home) *home = p->pw_dir; @@ -185,8 +193,12 @@ int get_group_creds(const char **groupname, gid_t *gid) { if (!g) return errno > 0 ? -errno : -ESRCH; - if (gid) + if (gid) { + if (!gid_is_valid(g->gr_gid)) + return -EBADMSG; + *gid = g->gr_gid; + } return 0; } @@ -278,6 +290,9 @@ int in_gid(gid_t gid) { if (getegid() == gid) return 1; + if (!gid_is_valid(gid)) + return -EINVAL; + ngroups_max = sysconf(_SC_NGROUPS_MAX); assert(ngroups_max > 0); |