crypto: initialize KeyObjectData mutex eagerly

Create the mutex before sharing key data so every copy uses one lock.

Signed-off-by: Filip Skokan <panva.ip@gmail.com>
PR-URL: #64851
Backport-PR-URL: #65087
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: panva

src/crypto/crypto_keys.cc

@@ -953,10 +953,13 @@ KeyObjectData::KeyObjectData(std::nullptr_t)
 
 KeyObjectData::KeyObjectData(ByteSource symmetric_key)
     : key_type_(KeyType::kKeyTypeSecret),
+      mutex_(std::make_shared<Mutex>()),
       data_(std::make_shared<Data>(std::move(symmetric_key))) {}
 
 KeyObjectData::KeyObjectData(KeyType type, EVPKeyPointer&& pkey)
-    : key_type_(type), data_(std::make_shared<Data>(std::move(pkey))) {}
+    : key_type_(type),
+      mutex_(std::make_shared<Mutex>()),
+      data_(std::make_shared<Data>(std::move(pkey))) {}
 
 void KeyObjectData::MemoryInfo(MemoryTracker* tracker) const {
   if (!*this) return;