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Amend truncation fix, the real problem was the size passed to snprintf().

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sudo_rcstr_alloc() takes a length (not a size) parameter so when
calling snprintf() we need to add one to the length.
This commit is contained in:
Todd C. Miller
2021-09-21 19:01:22 -06:00
parent e23874d0fa
commit 0f2252f898
1 changed files with 2 additions and 2 deletions
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4
plugins/sudoers/ldap_util.c
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@@ -478,10 +478,10 @@ sudo_ldap_role_to_priv(const char *cn, void *hosts, void *runasusers,
if (store_options) {
/* Use sudoRole in place of file name in defaults. */
size_t slen = sizeof("sudoRole ") + strlen(priv->ldap_role);
size_t slen = sizeof("sudoRole ") - 1 + strlen(priv->ldap_role);
if ((source = sudo_rcstr_alloc(slen)) == NULL)
goto oom;
if ((size_t)snprintf(source, slen, "sudoRole %s", priv->ldap_role) >= slen) {
if ((size_t)snprintf(source, slen + 1, "sudoRole %s", priv->ldap_role) != slen) {
sudo_warnx(U_("internal error, %s overflow"), __func__);
goto bad;
}