[openssl-dev] Fix a dead lock of async engine.

[Emeric Brun]

Hi All,

This bug also affects the 1.1.0

R,
Emeric

>From b64e57b30d8d619c0326da4a5be3b62528d9ff6c Mon Sep 17 00:00:00 2001
From: Emeric Brun <eb...@haproxy.com>
Date: Wed, 26 Jul 2017 15:12:46 +0200
Subject: [PATCH] Fix async engine dead lock in error case in ossl_rand.c

---
 crypto/rand/ossl_rand.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crypto/rand/ossl_rand.c b/crypto/rand/ossl_rand.c
index 1b4b21b..119c2b4 100644
--- a/crypto/rand/ossl_rand.c
+++ b/crypto/rand/ossl_rand.c
@@ -485,6 +485,7 @@ static int rand_bytes(unsigned char *buf, int num)
     ASYNC_block_pause();
     if (!EVP_DigestUpdate(m, sp->md, sizeof(sp->md))
             || !EVP_DigestFinal_ex(m, sp->md, NULL)) {
+        ASYNC_unblock_pause();
         CRYPTO_THREAD_unlock(rand_lock);
         goto err;
     }
-- 
2.7.4


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