Use RAND_poll() for seeding randomness after fork().

OpenSSL deprecated RAND_cleanup(), and OpenSSL 1.1.0 made it into a
no-op.  Replace it with RAND_poll(), per an OpenSSL community
recommendation.  While this has no user-visible consequences under
OpenSSL defaults, it might help under non-default settings.

Daniel Gustafsson, reviewed by David Steele and Michael Paquier.

Discussion: https://postgr.es/m/9B038FA5-23E8-40D0-B932-D515E1D8F66A@yesql.se

diff --git a/src/backend/postmaster/fork_process.c b/src/backend/postmaster/fork_process.c
index def3cee37e2d78fbad55781c73df8eaa96fe32da..15d634080078106113b5454d34e7d487eaea8391 100644 (file)
--- a/src/backend/postmaster/fork_process.c
+++ b/src/backend/postmaster/fork_process.c
@@ -109,10 +109,12 @@ fork_process(void)
        }
 
        /*
-        * Make sure processes do not share OpenSSL randomness state.
+        * Make sure processes do not share OpenSSL randomness state. This is
+        * no longer required in OpenSSL 1.1.1 and later versions, but until
+        * we drop support for version < 1.1.1 we need to do this.
         */
 #ifdef USE_OPENSSL
-       RAND_cleanup();
+       RAND_poll();
 #endif
    }