Submitted By:            Xi Ruoyao <xry111@mengyan1223.wang>
Date:                    2019-09-12
Initial Package Version: 1.1.1d
Upstream Status:         Applied
Origin:                  Upstream
Description:             Fixes an issue causing test failure (20-test_enc.t)
                         and potential data loss.

diff --git a/crypto/comp/c_zlib.c b/crypto/comp/c_zlib.c
index d688deee5f2..19b48fb09b0 100644
--- a/crypto/comp/c_zlib.c
+++ b/crypto/comp/c_zlib.c
@@ -564,6 +564,13 @@ static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr)
             ret = BIO_flush(next);
         break;
 
+    case BIO_CTRL_PENDING:
+        ret = ctx->zin.avail_in != 0;
+        break;
+    case BIO_CTRL_WPENDING:
+        ret = ctx->ocount != 0;
+        break;
+
     case BIO_C_SET_BUFF_SIZE:
         ibs = -1;
         obs = -1;