Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/asan/TestCases/strstr-2.c

@@ -0,0 +1,21 @@
+// Test needle overflow in strstr function
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+
+// Test intercept_strstr asan option
+// Disable other interceptors because strlen may be called inside strstr
+// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false:intercept_strlen=false %run %t 2>&1
+
+#include <assert.h>
+#include <string.h>
+#include <sanitizer/asan_interface.h>
+
+int main(int argc, char **argv) {
+  char *r = 0;
+  char s1[] = "ab";
+  char s2[4] = "cab";
+  __asan_poison_memory_region ((char *)&s2[2], 2);
+  r = strstr(s1, s2);
+  // CHECK:'s2'{{.*}} <== Memory access at offset {{[0-9]+}} partially overflows this variable
+  assert(r == 0);
+  return 0;
+}