Don't return an error until the global lock is released.

diff --git a/crypto/engine/engine_lib.c b/crypto/engine/engine_lib.c
index 48c4fb10cb052708908c2999fb5f188c026155c4..781494d1a96bbde8bb3bb124455afb1c57b1584e 100644 (file)
--- a/crypto/engine/engine_lib.c
+++ b/crypto/engine/engine_lib.c
@@ -288,6 +288,7 @@ EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
 
 int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
        {
+       int ctrl_exists;
        if(e == NULL)
                {
                ENGINEerr(ENGINE_F_ENGINE_CTRL,ERR_R_PASSED_NULL_PARAMETER);
@@ -299,12 +300,13 @@ int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
                ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_REFERENCE);
                return 0;
                }
-       if (!e->ctrl)
+       ctrl_exists = (e->ctrl ? 1 : 0);
+       CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+       if (!ctrl_exists)
                {
                ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
                return 0;
                }
-       CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
        return e->ctrl(cmd, i, p, f);
        }