Index: compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
+++ compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
@@ -486,9 +486,14 @@
 
 bool GetRandom(void *buffer, uptr length, bool blocking) {
   CHECK_LE(length, ZX_CPRNG_DRAW_MAX_LEN);
-  size_t size;
-  CHECK_EQ(_zx_cprng_draw(buffer, length, &size), ZX_OK);
-  CHECK_EQ(size, length);
+  
+  while (length > 0) {
+    size_t size;
+    _zx_cprng_draw(buffer, length, &size);
+    CHECK_EQ(status, ZX_OK);
+    buffer += size;
+    length -= size;
+  }
   return true;
 }