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fuzz_http3serverreq: Fuzz stream shutdown #315

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Jan 14, 2025
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fuzz_http3serverreq: Fuzz stream shutdown #315

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25 changes: 25 additions & 0 deletions fuzz/fuzz_http3serverreq.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,27 @@ int send_data(nghttp3_conn *conn) {
}
}; // namespace

namespace {
int shutdown_streams(nghttp3_conn *conn,
FuzzedDataProvider &fuzzed_data_provider) {
for (; fuzzed_data_provider.ConsumeBool();) {
auto stream_id = fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(
0, NGHTTP3_MAX_VARINT);

if (fuzzed_data_provider.ConsumeBool()) {
auto rv = nghttp3_conn_shutdown_stream_read(conn, stream_id);
if (rv != 0) {
return rv;
}
} else {
nghttp3_conn_shutdown_stream_write(conn, stream_id);
}
}

return 0;
}
}; // namespace

namespace {
int set_stream_priorities(nghttp3_conn *conn,
FuzzedDataProvider &fuzzed_data_provider) {
Expand Down Expand Up @@ -343,6 +364,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
}
}

if (shutdown_streams(conn, fuzzed_data_provider) != 0) {
goto fin;
}

if (!shutdown_started && fuzzed_data_provider.ConsumeBool()) {
shutdown_started = true;

Expand Down
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