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Fix memory leak in libprotobuf-mutator-example

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This commit is contained in:
Kiprey
2021-12-04 23:49:35 +08:00
parent 773baf9391
commit ed808fe92f
2 changed files with 7 additions and 3 deletions
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8
custom_mutators/libprotobuf-mutator-example/lpm_aflpp_custom_mutator_input.cc
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@ -99,10 +99,12 @@ extern "C" size_t afl_custom_fuzz(MyMutator *mutator, // return value from afl_c
std::string s = ProtoToData(*p); std::string s = ProtoToData(*p);
// Copy to a new buffer ( mutated_out ) // Copy to a new buffer ( mutated_out )
size_t mutated_size = s.size() <= max_size ? s.size() : max_size; // check if raw data's size is larger than max_size size_t mutated_size = s.size() <= max_size ? s.size() : max_size; // check if raw data's size is larger than max_size
uint8_t *mutated_out = new uint8_t[mutated_size+1];
memcpy(mutated_out, s.c_str(), mutated_size); // copy the mutated data delete mutator->mutated_out;
mutator->mutated_out = new uint8_t[mutated_size+1];
memcpy(mutator->mutated_out, s.c_str(), mutated_size); // copy the mutated data
// Assign the mutated data and return mutated_size // Assign the mutated data and return mutated_size
*out_buf = mutated_out; *out_buf = mutator->mutated_out;
return mutated_size; return mutated_size;
} }

2
custom_mutators/libprotobuf-mutator-example/lpm_aflpp_custom_mutator_input.h
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@ -2,4 +2,6 @@
#include "test.pb.h" #include "test.pb.h"
class MyMutator : public protobuf_mutator::Mutator { class MyMutator : public protobuf_mutator::Mutator {
public:
uint8_t *mutated_out = nullptr;
}; };