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fuzz-dhcp-server: duplicate input data
As `dhcp_server_handle_message()` -> `ensure_sane_request()` may modify the input data, and that causes error in some fuzzing engine.
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@ -21,12 +21,15 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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_cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
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struct in_addr address = {.s_addr = htobe32(UINT32_C(10) << 24 | UINT32_C(1))};
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static const uint8_t chaddr[] = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
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_cleanup_free_ uint8_t *duped = NULL;
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uint8_t *client_id;
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DHCPLease *lease;
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if (size < sizeof(DHCPMessage))
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return 0;
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assert_se(duped = memdup(data, size));
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assert_se(sd_dhcp_server_new(&server, 1) >= 0);
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server->fd = open("/dev/null", O_RDWR|O_CLOEXEC|O_NOCTTY);
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assert_se(server->fd >= 0);
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@ -51,7 +54,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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assert_se(hashmap_ensure_put(&server->bound_leases_by_address, NULL, UINT32_TO_PTR(lease->address), lease) >= 0);
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lease->server = server;
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(void) dhcp_server_handle_message(server, (DHCPMessage*)data, size);
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(void) dhcp_server_handle_message(server, (DHCPMessage*) duped, size);
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return 0;
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}
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