diff --git a/base/allocator/partition_allocator/partition_lock.h b/base/allocator/partition_allocator/partition_lock.h
index 47ccb42ea6053b243bd527c8d8d8625dcec189af..3d14fcb7dc740bccd0451414ce63ad5c19317b79 100644
--- a/base/allocator/partition_allocator/partition_lock.h
+++ b/base/allocator/partition_allocator/partition_lock.h
@@ -17,11 +17,13 @@
 #include "base/allocator/partition_allocator/pkey.h"
 #include "base/allocator/partition_allocator/spinning_mutex.h"
 #include "build/build_config.h"
+#include "base/logging.h"
 
 namespace partition_alloc::internal {
 
 class PA_LOCKABLE Lock {
  public:
+  bool is_locked_ = false;
   inline constexpr Lock();
   void Acquire() PA_EXCLUSIVE_LOCK_FUNCTION() {
 #if BUILDFLAG(PA_DCHECK_IS_ON)
@@ -56,7 +58,11 @@ class PA_LOCKABLE Lock {
         // issue.
         PA_IMMEDIATE_CRASH();
       }
+      if (is_locked_) {
+        LOG(ERROR) << "partition_alloc::internal::Lock::Acquire already locked!!!";
+      }
       lock_.Acquire();
+      is_locked_ = true;
     }
     owning_thread_ref_.store(current_thread, std::memory_order_release);
 #else
@@ -70,6 +76,7 @@ class PA_LOCKABLE Lock {
                              std::memory_order_release);
 #endif
     lock_.Release();
+    is_locked_ = false;
   }
   void AssertAcquired() const PA_ASSERT_EXCLUSIVE_LOCK() {
     lock_.AssertAcquired();