Minor fixes and hardening

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/24037)

2 files changed, 15 insertions, 5 deletions

diff --git a/ssl/quic/quic_impl.c b/ssl/quic/quic_impl.c
index e8f69c712c..9249c64cff 100644
--- a/ssl/quic/quic_impl.c
+++ b/ssl/quic/quic_impl.c
@@ -327,8 +327,10 @@ static int expect_quic_as(const SSL *s, QCTX *ctx, uint32_t flags)
         }
 
         if ((flags & QCTX_C) == 0
-            && (qc->default_xso == NULL || (flags & QCTX_S) == 0))
-            return wrong_type(s, flags);
+            && (qc->default_xso == NULL || (flags & QCTX_S) == 0)) {
+            wrong_type(s, flags);
+            goto err;
+        }
 
         ctx->xso            = qc->default_xso;
         break;
diff --git a/ssl/quic/quic_obj.c b/ssl/quic/quic_obj.c
index 827b0c38b0..6d4934483a 100644
--- a/ssl/quic/quic_obj.c
+++ b/ssl/quic/quic_obj.c
@@ -81,9 +81,9 @@ static int obj_update_cache(QUIC_OBJ *obj)
 
 SSL_CONNECTION *ossl_quic_obj_get0_handshake_layer(QUIC_OBJ *obj)
 {
-    assert(obj->init_done);
+    assert(obj != NULL && obj->init_done);
 
-    if (obj == NULL || obj->ssl.type != SSL_TYPE_QUIC_CONNECTION)
+    if (obj->ssl.type != SSL_TYPE_QUIC_CONNECTION)
         return NULL;
 
     return SSL_CONNECTION_FROM_SSL_ONLY(((QUIC_CONNECTION *)obj)->tls);
@@ -92,7 +92,10 @@ SSL_CONNECTION *ossl_quic_obj_get0_handshake_layer(QUIC_OBJ *obj)
 /* (Returns a cached result.) */
 int ossl_quic_obj_can_support_blocking(const QUIC_OBJ *obj)
 {
-    QUIC_REACTOR *rtor = ossl_quic_obj_get0_reactor(obj);
+    QUIC_REACTOR *rtor;
+
+    assert(obj != NULL);
+    rtor = ossl_quic_obj_get0_reactor(obj);
 
     return ossl_quic_reactor_can_poll_r(rtor)
         || ossl_quic_reactor_can_poll_w(rtor);
@@ -102,6 +105,7 @@ int ossl_quic_obj_desires_blocking(const QUIC_OBJ *obj)
 {
     unsigned int req_blocking_mode;
 
+    assert(obj != NULL);
     for (; (req_blocking_mode = obj->req_blocking_mode)
             == QUIC_BLOCKING_MODE_INHERIT && obj->parent_obj != NULL;
          obj = obj->parent_obj);
@@ -111,6 +115,8 @@ int ossl_quic_obj_desires_blocking(const QUIC_OBJ *obj)
 
 int ossl_quic_obj_blocking(const QUIC_OBJ *obj)
 {
+    assert(obj != NULL);
+
     if (!ossl_quic_obj_desires_blocking(obj))
         return 0;
 
@@ -121,5 +127,7 @@ int ossl_quic_obj_blocking(const QUIC_OBJ *obj)
 
 void ossl_quic_obj_set_blocking_mode(QUIC_OBJ *obj, unsigned int mode)
 {
+    assert(obj != NULL);
+
     obj->req_blocking_mode = mode;
 }