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Use FuzzedDataProvider in fuzz_http3serverreq #285

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merged 1 commit into from
Dec 29, 2024
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Use FuzzedDataProvider in fuzz_http3serverreq #285

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23 changes: 17 additions & 6 deletions fuzz/fuzz_http3serverreq.cc
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
#include <array>

#include <fuzzer/FuzzedDataProvider.h>

#include <nghttp3/nghttp3.h>

static int send_data(nghttp3_conn *conn) {
Expand Down Expand Up @@ -31,6 +33,7 @@ static int send_data(nghttp3_conn *conn) {
}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
FuzzedDataProvider fuzzed_data_provider(data, size);
nghttp3_callbacks callbacks{};
nghttp3_settings settings;

Expand All @@ -51,13 +54,21 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
goto fin;
}

nread = nghttp3_conn_read_stream(conn, 0, data, size, 0);
if (nread < 0) {
goto fin;
}
while (fuzzed_data_provider.remaining_bytes() > 0) {
auto stream_id = fuzzed_data_provider.ConsumeIntegral<int64_t>();
auto chunk_size = fuzzed_data_provider.ConsumeIntegral<size_t>();
auto chunk = fuzzed_data_provider.ConsumeBytes<uint8_t>(chunk_size);
auto fin = fuzzed_data_provider.ConsumeBool();

if (send_data(conn) != 0) {
goto fin;
nread = nghttp3_conn_read_stream(conn, stream_id, chunk.data(),
chunk.size(), fin);
if (nread < 0) {
goto fin;
}

if (send_data(conn) != 0) {
goto fin;
}
}

fin:
Expand Down
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