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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:59:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:59:48 +0000
commit3b9b6d0b8e7f798023c9d109c490449d528fde80 (patch)
tree2e1c188dd7b8d7475cd163de9ae02c428343669b /fuzz/dns_message_parse.c
parentInitial commit. (diff)
downloadbind9-3b9b6d0b8e7f798023c9d109c490449d528fde80.tar.xz
bind9-3b9b6d0b8e7f798023c9d109c490449d528fde80.zip
Adding upstream version 1:9.18.19.upstream/1%9.18.19upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fuzz/dns_message_parse.c')
-rw-r--r--fuzz/dns_message_parse.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/fuzz/dns_message_parse.c b/fuzz/dns_message_parse.c
new file mode 100644
index 0000000..02006a8
--- /dev/null
+++ b/fuzz/dns_message_parse.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <isc/buffer.h>
+#include <isc/commandline.h>
+#include <isc/file.h>
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/result.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <dns/message.h>
+
+#include "fuzz.h"
+
+bool debug = false;
+
+static isc_mem_t *mctx = NULL;
+static uint8_t *output = NULL;
+static size_t output_len = 1024;
+static uint8_t render_buf[64 * 1024 - 1];
+
+int
+LLVMFuzzerInitialize(int *argc __attribute__((unused)),
+ char ***argv __attribute__((unused))) {
+ isc_mem_create(&mctx);
+ output = isc_mem_get(mctx, output_len);
+
+ return (0);
+}
+
+static isc_result_t
+parse_message(isc_buffer_t *input, dns_message_t **messagep) {
+ isc_result_t result;
+ dns_message_t *message = NULL;
+
+ dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &message);
+
+ result = dns_message_parse(message, input, DNS_MESSAGEPARSE_BESTEFFORT);
+ if (result == DNS_R_RECOVERABLE) {
+ result = ISC_R_SUCCESS;
+ }
+
+ if (result == ISC_R_SUCCESS && messagep != NULL) {
+ *messagep = message;
+ } else {
+ dns_message_detach(&message);
+ }
+
+ return (result);
+}
+
+static isc_result_t
+print_message(dns_message_t *message) {
+ isc_result_t result;
+ isc_buffer_t buffer;
+
+ do {
+ isc_buffer_init(&buffer, output, output_len);
+ result = dns_message_totext(message, &dns_master_style_debug, 0,
+ &buffer);
+ if (result == ISC_R_NOSPACE) {
+ isc_mem_put(mctx, output, output_len);
+ output_len *= 2;
+ output = isc_mem_get(mctx, output_len);
+ continue;
+ }
+ } while (result == ISC_R_NOSPACE);
+
+ if (debug) {
+ fprintf(stderr, "%.*s\n", (int)isc_buffer_usedlength(&buffer),
+ output);
+ }
+
+ return (result);
+}
+
+#define CHECKRESULT(r, f) \
+ { \
+ r = (f); \
+ if (r != ISC_R_SUCCESS) { \
+ goto cleanup; \
+ } \
+ }
+
+static isc_result_t
+render_message(dns_message_t **messagep) {
+ isc_result_t result;
+ dns_message_t *message = *messagep;
+ isc_buffer_t buffer;
+ dns_compress_t cctx;
+
+ isc_buffer_init(&buffer, render_buf, sizeof(render_buf));
+
+ message->from_to_wire = DNS_MESSAGE_INTENTRENDER;
+ for (size_t i = 0; i < DNS_SECTION_MAX; i++) {
+ message->counts[i] = 0;
+ }
+
+ result = dns_compress_init(&cctx, -1, mctx);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ CHECKRESULT(result, dns_message_renderbegin(message, &cctx, &buffer));
+
+ CHECKRESULT(result, dns_message_rendersection(message,
+ DNS_SECTION_QUESTION, 0));
+
+ CHECKRESULT(result,
+ dns_message_rendersection(message, DNS_SECTION_ANSWER, 0));
+ CHECKRESULT(result, dns_message_rendersection(
+ message, DNS_SECTION_AUTHORITY, 0));
+
+ CHECKRESULT(result, dns_message_rendersection(
+ message, DNS_SECTION_ADDITIONAL, 0));
+
+ dns_message_renderend(message);
+
+ dns_compress_invalidate(&cctx);
+
+ message->from_to_wire = DNS_MESSAGE_INTENTPARSE;
+
+ dns_message_detach(messagep);
+
+ result = parse_message(&buffer, messagep);
+
+ return (result);
+
+cleanup:
+ dns_compress_invalidate(&cctx);
+ return (result);
+}
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+ isc_buffer_t buffer;
+ isc_result_t result;
+ dns_message_t *message = NULL;
+
+ if (size > 65535) {
+ return (0);
+ }
+
+ isc_buffer_constinit(&buffer, data, size);
+ isc_buffer_add(&buffer, size);
+ isc_buffer_setactive(&buffer, size);
+
+ result = parse_message(&buffer, &message);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup;
+ }
+
+ result = print_message(message);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup;
+ }
+
+ result = render_message(&message);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup;
+ }
+
+ result = print_message(message);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup;
+ }
+
+cleanup:
+ if (message != NULL) {
+ dns_message_detach(&message);
+ }
+
+ return (0);
+}