X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/b1ab9ed8d0e0f1c3b66d7daa8fd5564444c56195..313fa17b58b78d3c26fb986be9e8fce975cec88c:/libsecurity_cdsa_client/lib/macclient.cpp

diff --git a/libsecurity_cdsa_client/lib/macclient.cpp b/libsecurity_cdsa_client/lib/macclient.cpp
index 38c8b6a7..1fdc177a 100644
--- a/libsecurity_cdsa_client/lib/macclient.cpp
+++ b/libsecurity_cdsa_client/lib/macclient.cpp
@@ -29,6 +29,7 @@ using namespace CssmClient;
 //
 void MacContext::activate()
 {
+    StLock<Mutex> _(mActivateMutex);
 	if (!mActive) 
 	{
 		check(CSSM_CSP_CreateMacContext(attachment()->handle(), mAlgorithm,