From 107dc767391902d5d3b000deecafb804c1c68c1b Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Thu, 27 Jul 2017 09:05:16 +0200
Subject: [PATCH] core: dns cache - avoid bitshifting with more than the size

- avoid undefined behaviour as per C specs
---
 src/core/dns_cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/dns_cache.c b/src/core/dns_cache.c
index 7f3e33875d5..e8bfd7f5e62 100644
--- a/src/core/dns_cache.c
+++ b/src/core/dns_cache.c
@@ -2344,7 +2344,7 @@ inline static struct dns_rr* dns_srv_get_nxt_rr(struct dns_hash_entry* e,
 #endif
 	/* i is the winner */
 	*no=n; /* grp. start */
-	srv_mark_tried(tried, i); /* mark it */
+	if(i<8*sizeof(*tried)) srv_mark_tried(tried, i); /* mark it */
 	return r_sums[i].rr;
 no_more_rrs:
 	*no=n;