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-rw-r--r--src/resolve/resolved-dns-answer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-answer.c b/src/resolve/resolved-dns-answer.c
index f1f4d909cc..92b9871dbb 100644
--- a/src/resolve/resolved-dns-answer.c
+++ b/src/resolve/resolved-dns-answer.c
@@ -271,6 +271,8 @@ void dns_answer_order_by_scope(DnsAnswer *a, bool prefer_link_local) {
int dns_answer_reserve(DnsAnswer **a, unsigned n_free) {
DnsAnswer *n;
+ assert(a);
+
if (n_free <= 0)
return 0;
@@ -285,6 +287,9 @@ int dns_answer_reserve(DnsAnswer **a, unsigned n_free) {
if ((*a)->n_allocated >= ns)
return 0;
+ /* Allocate more than we need */
+ ns *= 2;
+
n = realloc(*a, offsetof(DnsAnswer, items) + sizeof(DnsAnswerItem) * ns);
if (!n)
return -ENOMEM;