diff --git a/compiler-rt/lib/hwasan/hwasan_allocator.cpp b/compiler-rt/lib/hwasan/hwasan_allocator.cpp
--- a/compiler-rt/lib/hwasan/hwasan_allocator.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_allocator.cpp
@@ -265,7 +265,7 @@
                                                   : __lsan::kDirectlyLeaked);
 #endif
   meta->SetAllocated(StackDepotPut(*stack), orig_size);
-  RunMallocHooks(user_ptr, size);
+  RunMallocHooks(user_ptr, orig_size);
   return user_ptr;
 }
 
diff --git a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
--- a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
@@ -6,9 +6,6 @@
 // Must not be implemented, no other reason to install interceptors.
 // XFAIL: ubsan
 
-// FIXME: Implement.
-// XFAIL: hwasan
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <sanitizer/allocator_interface.h>
diff --git a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
--- a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
@@ -6,9 +6,6 @@
 // Must not be implemented, no other reason to install interceptors.
 // XFAIL: ubsan
 
-// FIXME: Implement.
-// XFAIL: hwasan
-
 #include <assert.h>
 #include <sanitizer/allocator_interface.h>
 #include <stdlib.h>