force reseeding if pid has changed.

ok deraadt@

1 files changed, 7 insertions, 2 deletions

diff --git a/src/lib/libc/net/res_random.c b/src/lib/libc/net/res_random.c
index f28692f7c2..394072c813 100644
--- a/src/lib/libc/net/res_random.c
+++ b/src/lib/libc/net/res_random.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: res_random.c,v 1.21 2014/07/20 04:22:34 guenther Exp $ */
+/* $OpenBSD: res_random.c,v 1.22 2015/06/04 19:26:39 eric Exp $ */
 
 /*
  * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
@@ -101,6 +101,7 @@ static u_int16_t ru_counter = 0;
 static u_int16_t ru_msb = 0;
 static struct prf_ctx *ru_prf = NULL;
 static time_t ru_reseed;
+static pid_t ru_pid;
 
 static u_int16_t pmod(u_int16_t, u_int16_t, u_int16_t);
 static void res_initid(void);
@@ -227,15 +228,19 @@ u_int
 res_randomid(void)
 {
         struct timespec ts;
+        pid_t pid;
         u_int r;
         _THREAD_PRIVATE_MUTEX(random);
 
         clock_gettime(CLOCK_MONOTONIC, &ts);
+        pid = getpid();
 
         _THREAD_PRIVATE_MUTEX_LOCK(random);
 
-        if (ru_counter >= RU_MAX || ts.tv_sec > ru_reseed)
+        if (ru_counter >= RU_MAX || ts.tv_sec > ru_reseed || pid != ru_pid) {
                 res_initid();
+                ru_pid = pid;
+        }
 
         /* Linear Congruential Generator */
         ru_x = (ru_a * ru_x + ru_b) % RU_M;