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Libfuzzer: do not pass null into user function 

Differential Revision: http://reviews.llvm.org/D15098

llvm-svn: 254558
This commit is contained in:
Mike Aizatsky 2015-12-02 22:43:53 +00:00
parent 1f11b4e3a7
commit 71552ce64b
2 changed files with 7 additions and 1 deletions
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6
llvm/lib/Fuzzer/FuzzerLoop.cpp
View File

@ -238,7 +238,11 @@ void Fuzzer::RunOneAndUpdateCorpus(Unit &U) {
}
void Fuzzer::ExecuteCallback(const Unit &U) {
int Res = USF.TargetFunction(U.data(), U.size());
const uint8_t *Data = U.data();
uint8_t EmptyData;
if (!Data)
Data = &EmptyData;
int Res = USF.TargetFunction(Data, U.size());
(void)Res;
assert(Res == 0);
}

2
llvm/lib/Fuzzer/test/SimpleTest.cpp
View File

@ -1,4 +1,5 @@
// Simple test for a fuzzer. The fuzzer must find the string "Hi!".
#include <assert.h>
#include <cstdint>
#include <cstdlib>
#include <cstddef>
@ -7,6 +8,7 @@
static volatile int Sink;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
assert(Data);
if (Size > 0 && Data[0] == 'H') {
Sink = 1;
if (Size > 1 && Data[1] == 'i') {