another thread-safety fix

diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index b532305b80b08bc508342a167dac9cec92085cf0..a4612d6639e1a1d2e51a3f368548c2e2370b4aec 100644 (file)
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -481,6 +481,7 @@ BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
                                        const BIGNUM *mod, BN_CTX *ctx)
        {
        int got_write_lock = 0;
+       BN_MONT_CTX *ret;
 
        CRYPTO_r_lock(lock);
        if (!*pmont)
@@ -491,19 +492,20 @@ BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
 
                if (!*pmont)
                        {
-                       BN_MONT_CTX *mtmp;
-                       mtmp = BN_MONT_CTX_new();
-                       if (mtmp && !BN_MONT_CTX_set(mtmp, mod, ctx))
-                               BN_MONT_CTX_free(mtmp);
+                       ret = BN_MONT_CTX_new();
+                       if (ret && !BN_MONT_CTX_set(ret, mod, ctx))
+                               BN_MONT_CTX_free(ret);
                        else
-                               *pmont = mtmp;
+                               *pmont = ret;
                        }
                }
        
+       ret = *pmont;
+       
        if (got_write_lock)
                CRYPTO_w_unlock(lock);
        else
                CRYPTO_r_unlock(lock);
                
-       return *pmont;
+       return ret;
        }