Linux sandbox: exclude MSAN from baseline policy tests

sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc

Index: sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
diff --git a/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc b/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
index 9182e076e81f58ec91c57a2482fb3dd31bbc1fdd..13f40e31b31cac31ef9e8830bd12bd0528c1e64a 100644
--- a/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
+++ b/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
@@ -54,7 +54,8 @@ BPF_TEST_C(BaselinePolicy, FchmodErrno, BaselinePolicy) {
 }
 
 // TODO(jln): make this work with the sanitizers.
-#if !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER)
+#if !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER) && \
+    !defined(MEMORY_SANITIZER)
 
 BPF_TEST_C(BaselinePolicy, ForkErrno, BaselinePolicy) {
   errno = 0;
@@ -108,7 +109,8 @@ BPF_DEATH_TEST_C(BaselinePolicy,
   HandlePostForkReturn(pid);
 }
 
-#endif  // !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER)
+#endif  // !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER) &&
+        // !defined(MEMORY_SANITIZER)
 
 }  // namespace