TXT records should have at least one character, so enforce this.
Previously parser SIGSEGV'd on ->txt.strings being NULL.
---
src/resolve/resolved-dns-packet.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/resolve/resolved-dns-packet.c
b/src/resolve/resolved-dns-packet.c
index e5d07b3..b02b9dd 100644
--- a/src/resolve/resolved-dns-packet.c
+++ b/src/resolve/resolved-dns-packet.c
@@ -1109,6 +1109,10 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord
**ret, size_t *start) {
case DNS_TYPE_TXT: {
char *s;
+ if (!rdlength) {
+ r = -EBADMSG;
+ goto fail;
+ }
while (p->rindex < offset + rdlength) {
r = dns_packet_read_string(p, &s, NULL);
if (r < 0)
--
2.1.2
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