1 // Test haystack overflow in strstr function
2 // RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
3
4 // Test intercept_strstr asan option
5 // Disable other interceptors because strlen may be called inside strstr
6 // RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
7
8 #include <assert.h>
9 #include <string.h>
10 #include <sanitizer/asan_interface.h>
11
main(int argc,char ** argv)12 int main(int argc, char **argv) {
13 char *r = 0;
14 char s2[] = "c";
15 char s1[4] = "acb";
16 __asan_poison_memory_region ((char *)&s1[2], 2);
17 r = strstr(s1, s2);
18 // CHECK:'s1' <== Memory access at offset {{[0-9]+}} partially overflows this variable
19 assert(r == s1 + 1);
20 return 0;
21 }
22