dns/rr: fix dns_rr_print underflow

found by coverity
baresip · Jul 23, 2024 · d63bb23 · d63bb23
1 parent 32404d8
commit d63bb23
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/dns/rr.c b/src/dns/rr.c
@@ -615,8 +615,10 @@ int dns_rr_print(struct re_printf *pf, const struct dnsrr *rr)
 	n = (w > l) ? w - l : 0;
 
 	err = re_hprintf(pf, "%s.", rr->name);
-	while (n--)
+	while (n) {
 		err |= pf->vph(" ", 1, pf->arg);
+		--n;
+	}
 
 	err |= re_hprintf(pf, " %10lld %-4s %-7s ",
 			  rr->ttl,