Systemd/src/fuzz/fuzz-dns-packet.c
Zbigniew Jędrzejewski-Szmek 11a1589223 tree-wide: drop license boilerplate
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.

I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
2018-04-06 18:58:55 +02:00

28 lines
963 B
C

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
Copyright 2018 Jonathan Rudenberg
***/
#include "fuzz.h"
#include "resolved-dns-packet.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
if (size > DNS_PACKET_SIZE_MAX)
return 0;
assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
p->size = 0; /* by default append starts after the header, undo that */
assert_se(dns_packet_append_blob(p, data, size, NULL) >= 0);
if (size < DNS_PACKET_HEADER_SIZE) {
/* make sure we pad the packet back up to the minimum header size */
assert_se(p->allocated >= DNS_PACKET_HEADER_SIZE);
memzero(DNS_PACKET_DATA(p) + size, DNS_PACKET_HEADER_SIZE - size);
p->size = DNS_PACKET_HEADER_SIZE;
}
(void) dns_packet_extract(p);
return 0;
}