test/Feature/ubsan/ubsan_pointer_overflow-applying_zero_offset_to_null_pointer.c


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// REQUIRES: geq-llvm-10.0

// RUN: %clang %s -fsanitize=pointer-overflow -emit-llvm -g %O0opt -c -o %t.bc
// RUN: rm -rf %t.klee-out
// RUN: %klee --output-dir=%t.klee-out --emit-all-errors --ubsan-runtime %t.bc 2>&1 | FileCheck %s
// RUN: ls %t.klee-out/ | grep .ktest | wc -l | grep 1
// RUN: ls %t.klee-out/ | grep .ptr.err | wc -l | grep 1

#include "klee/klee.h"
#include <stdio.h>

int main() {
  size_t address;
  volatile char *result;

  klee_make_symbolic(&address, sizeof(address), "address");
  klee_assume(address == 0);

  char *ptr = (char *)address;

  // CHECK: KLEE: ERROR: {{.*}}runtime/Sanitizer/ubsan/ubsan_handlers.cpp:{{[0-9]+}}: nullptr-with-offset
  result = ptr + 0;
  return 0;
}