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-rw-r--r--src/resolve/resolved-dns-packet.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c
index c587a56124..a9bd8b1398 100644
--- a/src/resolve/resolved-dns-packet.c
+++ b/src/resolve/resolved-dns-packet.c
@@ -1114,6 +1114,13 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start) {
case DNS_TYPE_TXT: {
char *s;
+ /* RFC 1035 says that TXT must be at least one
+ string. Reject empty records. */
+ if (!rdlength) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
while (p->rindex < offset + rdlength) {
r = dns_packet_read_string(p, &s, NULL);
if (r < 0)