bsnmpwalk: Fix crash on invalid data

PR: 258570 Reported by: Robert Morris <[email protected]> Reviewed by: emaste, markj Differential Revision: https://reviews.freebsd.org/D48422 (cherry picked from commit f021e35) (cherry picked from commit 7fbbab2)
freebsd · Jan 12, 2025 · 748e7bc · 748e7bc
1 parent dfd9c9b
commit 748e7bc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/usr.sbin/bsnmpd/tools/bsnmptools/bsnmpget.c b/usr.sbin/bsnmpd/tools/bsnmptools/bsnmpget.c
@@ -502,7 +502,7 @@ snmptool_walk(struct snmp_toolinfo *snmptoolctx)
 
 			outputs += rc;
 
-			if ((u_int)rc < resp.nbindings) {
+			if ((u_int)rc < resp.nbindings || resp.nbindings == 0) {
 				snmp_pdu_free(&resp);
 				break;
 			}