D46919.diff
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	diff --git a/usr.sbin/mountd/mountd.c b/usr.sbin/mountd/mountd.c
	--- a/usr.sbin/mountd/mountd.c
	+++ b/usr.sbin/mountd/mountd.c
	@@ -3684,7 +3684,9 @@
	cr->cr_uid = name_ul;
	}
	cr->cr_ngroups = 0;
	- while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS_MAX) {
	+ while (names != NULL && *names != '\0') {
	+ gid_t group;
	+
	name = strsep_quote(&names, ":");
	name_ul = strtoul(name, &end, 10);
	if (*end != '\0' \|\| end == name) {
	@@ -3692,13 +3694,16 @@
	syslog(LOG_ERR, "unknown group: %s", name);
	continue;
	}
	- groups[cr->cr_ngroups++] = gr->gr_gid;
	+ group = gr->gr_gid;
	} else {
	- groups[cr->cr_ngroups++] = name_ul;
	+ group = name_ul;
	+ }
	+ if (cr->cr_ngroups == NGROUPS_MAX) {
	+ syslog(LOG_ERR, "too many groups");
	+ break;
	}
	+ groups[cr->cr_ngroups++] = group;
	}
	- if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS_MAX)
	- syslog(LOG_ERR, "too many groups");
	if (cr->cr_ngroups > SMALLNGROUPS)
	cr->cr_groups = malloc(cr->cr_ngroups * sizeof(gid_t));
	memcpy(cr->cr_groups, groups, cr->cr_ngroups * sizeof(gid_t));