diff --git a/compiler-rt/lib/msan/msan_interceptors.cpp b/compiler-rt/lib/msan/msan_interceptors.cpp
--- a/compiler-rt/lib/msan/msan_interceptors.cpp
+++ b/compiler-rt/lib/msan/msan_interceptors.cpp
@@ -145,6 +145,8 @@
 
 #if !SANITIZER_NETBSD
 INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) {
+  if (IsInInterceptorScope())
+    return REAL(memcpy)(dest, src, n);
   return (char *)__msan_memcpy(dest, src, n) + n;
 }
 #define MSAN_MAYBE_INTERCEPT_MEMPCPY INTERCEPT_FUNCTION(mempcpy)
@@ -826,6 +828,7 @@
 
 INTERCEPTOR(int, gethostname, char *name, SIZE_T len) {
   ENSURE_MSAN_INITED();
+  InterceptorScope interceptor_scope;
   int res = REAL(gethostname)(name, len);
   if (!res) {
     SIZE_T real_len = REAL(strnlen)(name, len);
@@ -1327,6 +1330,8 @@
 #define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
   {                                                         \
     (void)ctx;                                              \
+    if (IsInInterceptorScope())                             \
+      return REAL(memcpy)(to, from, size);                  \
     return __msan_memcpy(to, from, size);                   \
   }