[sanitizer] Handle nullptr name in prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME) (#160824)

### Summary
This PR resolves #160562

Author: woruyu

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

@@ -1326,7 +1326,7 @@ PRCTL_INTERCEPTOR(int, prctl, int option, unsigned long arg2,
   static const int PR_SET_SECCOMP = 22;
   static const int SECCOMP_MODE_FILTER = 2;
 #  endif
-  if (option == PR_SET_VMA && arg2 == 0UL) {
+  if (option == PR_SET_VMA && arg2 == 0UL && arg5 != 0UL) {
     char *name = (char *)arg5;
     COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   }

compiler-rt/test/sanitizer_common/TestCases/Linux/prctl.cpp

@@ -88,5 +88,8 @@ int main() {
   res = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &pr);
   assert(res == -1);
 
+  unsigned long name = reinterpret_cast<unsigned long>(nullptr);
+  prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, 0, nullptr, name);
+
   return 0;
 }