Always use session_ctx when removing a session

Sessions are stored on the session_ctx, which doesn't change after
SSL_set_SSL_CTX().

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
diff --git a/ssl/record/rec_layer_d1.c b/ssl/record/rec_layer_d1.c
index a7cffc8..9e043f5 100644
--- a/ssl/record/rec_layer_d1.c
+++ b/ssl/record/rec_layer_d1.c
@@ -740,7 +740,7 @@
             BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
             ERR_add_error_data(2, "SSL alert number ", tmp);
             s->shutdown |= SSL_RECEIVED_SHUTDOWN;
-            SSL_CTX_remove_session(s->ctx, s->session);
+            SSL_CTX_remove_session(s->session_ctx, s->session);
             return (0);
         } else {
             al = SSL_AD_ILLEGAL_PARAMETER;
diff --git a/ssl/record/rec_layer_s3.c b/ssl/record/rec_layer_s3.c
index 7326076..bce82a7 100644
--- a/ssl/record/rec_layer_s3.c
+++ b/ssl/record/rec_layer_s3.c
@@ -1372,7 +1372,7 @@
             BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
             ERR_add_error_data(2, "SSL alert number ", tmp);
             s->shutdown |= SSL_RECEIVED_SHUTDOWN;
-            SSL_CTX_remove_session(s->ctx, s->session);
+            SSL_CTX_remove_session(s->session_ctx, s->session);
             return (0);
         } else {
             al = SSL_AD_ILLEGAL_PARAMETER;
diff --git a/ssl/s3_msg.c b/ssl/s3_msg.c
index 78ae099..185f0e9 100644
--- a/ssl/s3_msg.c
+++ b/ssl/s3_msg.c
@@ -72,7 +72,7 @@
         return -1;
     /* If a fatal one, remove from cache */
     if ((level == SSL3_AL_FATAL) && (s->session != NULL))
-        SSL_CTX_remove_session(s->ctx, s->session);
+        SSL_CTX_remove_session(s->session_ctx, s->session);
 
     s->s3->alert_dispatch = 1;
     s->s3->send_alert[0] = level;
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index 3799db1..a6957b3 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -746,9 +746,9 @@
     r.session_id_length = id_len;
     memcpy(r.session_id, id, id_len);
 
-    CRYPTO_THREAD_read_lock(ssl->ctx->lock);
-    p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
-    CRYPTO_THREAD_unlock(ssl->ctx->lock);
+    CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
+    p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
+    CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
     return (p != NULL);
 }
 
diff --git a/ssl/ssl_sess.c b/ssl/ssl_sess.c
index f13e466..9095363 100644
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -994,7 +994,7 @@
     if ((s->session != NULL) &&
         !(s->shutdown & SSL_SENT_SHUTDOWN) &&
         !(SSL_in_init(s) || SSL_in_before(s))) {
-        SSL_CTX_remove_session(s->ctx, s->session);
+        SSL_CTX_remove_session(s->session_ctx, s->session);
         return (1);
     } else
         return (0);