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Improve FuzzBuffer chunking

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Now allocates a new buffer for each chunk to better detect over-reads
This commit is contained in:
Jon Siwek 2020-04-27 16:25:56 -07:00
parent 8e6539b55f
commit 2922bf71b6
3 changed files with 37 additions and 28 deletions
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14
src/fuzzers/pop3-fuzzer.cc
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@ -53,28 +53,22 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
auto conn = add_connection();
auto a = add_analyzer(conn);
const unsigned char* chunk;
size_t chunk_size;
bool is_orig;
for ( ; ; )
{
auto err = fb.Next(&chunk, &chunk_size, &is_orig);
auto chunk = fb.Next();
if ( err )
break;
if ( chunk_size == 0 )
if ( ! chunk )
break;
try
{
a->DeliverStream(chunk_size, chunk, is_orig);
a->DeliverStream(chunk->size, chunk->data.get(), chunk->is_orig);
}
catch ( const binpac::Exception& e )
{
}
chunk = {};
mgr.Drain();
}