mirror of https://github.com/google/oss-fuzz.git
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* Copyright 2021 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "fuzz_header.h"
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/*
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* Targets answer_auth
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*/
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void FuzzDhcp(const uint8_t **data2, size_t *size2) {
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const uint8_t *data = *data2;
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size_t size = *size2;
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time_t now;
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int pxe_fd = 0;
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struct iovec *dhpa = malloc(sizeof(struct iovec));
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if (dhpa == NULL) return;
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char *content = malloc(sizeof(struct dhcp_packet));
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if (content == NULL) {
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free(dhpa);
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return;
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}
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dhpa->iov_base = content;
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dhpa->iov_len = sizeof(struct dhcp_packet);
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daemon->dhcp_packet = *dhpa;
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syscall_data = data;
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syscall_size = size;
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dhcp_packet(now, pxe_fd);
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// dnsmasq may change the iov_base if the buffer needs expansion.
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// Do not free in that case, only free if the buffer stays that same.
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free(daemon->dhcp_packet.iov_base);
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free(dhpa);
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}
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/*
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* Fuzzer entrypoint.
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*/
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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daemon = NULL;
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if (size < 1) {
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return 0;
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}
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// Initialize mini garbage collector
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gb_init();
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// Get a value we can use to decide which target to hit.
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int i = (int)data[0];
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data += 1;
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size -= 1;
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int succ = init_daemon(&data, &size);
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if (succ == 0) {
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cache_init();
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blockdata_init();
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FuzzDhcp(&data, &size);
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cache_start_insert();
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fuzz_blockdata_cleanup();
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}
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// Free data in mini garbage collector.
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gb_cleanup();
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return 0;
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}
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