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Diffstat (limited to '')
-rw-r--r-- | src/resolve/fuzz-dns-packet.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/resolve/fuzz-dns-packet.c b/src/resolve/fuzz-dns-packet.c new file mode 100644 index 0000000..de5ee20 --- /dev/null +++ b/src/resolve/fuzz-dns-packet.c @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "fuzz.h" +#include "memory-util.h" +#include "resolved-dns-packet.h" + +int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { + _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; + + if (outside_size_range(size, 0, 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; +} |