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-rw-r--r--src/resolve/resolved-dns-answer.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-answer.c b/src/resolve/resolved-dns-answer.c
index 14cba39ad2..f1f4d909cc 100644
--- a/src/resolve/resolved-dns-answer.c
+++ b/src/resolve/resolved-dns-answer.c
@@ -81,6 +81,8 @@ int dns_answer_add(DnsAnswer *a, DnsResourceRecord *rr, int ifindex) {
if (!a)
return -ENOSPC;
+ if (a->n_ref > 1)
+ return -EBUSY;
for (i = 0; i < a->n_rrs; i++) {
if (a->items[i].ifindex != ifindex)