avutil/hwcontext_vulkan: Fix leaks when semaphore creation fails

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

libavutil/hwcontext_vulkan.c

@@ -1807,16 +1807,22 @@ static void vulkan_frame_free(AVHWFramesContext *hwfc, AVVkFrame *f)
     VulkanDevicePriv *p = hwfc->device_ctx->internal->priv;
     FFVulkanFunctions *vk = &p->vkctx.vkfn;
     int nb_images = ff_vk_count_images(f);
+    int nb_sems = 0;
+
+    while (nb_sems < FF_ARRAY_ELEMS(f->sem) && f->sem[nb_sems])
+        nb_sems++;
+
+    if (nb_sems) {
+        VkSemaphoreWaitInfo sem_wait = {
+            .sType          = VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO,
+            .flags          = 0x0,
+            .pSemaphores    = f->sem,
+            .pValues        = f->sem_value,
+            .semaphoreCount = nb_sems,
+        };
 
-    VkSemaphoreWaitInfo sem_wait = {
-        .sType          = VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO,
-        .flags          = 0x0,
-        .pSemaphores    = f->sem,
-        .pValues        = f->sem_value,
-        .semaphoreCount = nb_images,
-    };
-
-    vk->WaitSemaphores(hwctx->act_dev, &sem_wait, UINT64_MAX);
+        vk->WaitSemaphores(hwctx->act_dev, &sem_wait, UINT64_MAX);
+    }
 
     vulkan_free_internal(f);
 
@@ -2098,7 +2104,8 @@ static int create_frame(AVHWFramesContext *hwfc, AVVkFrame **frame,
         if (ret != VK_SUCCESS) {
             av_log(hwctx, AV_LOG_ERROR, "Failed to create semaphore: %s\n",
                    ff_vk_ret2str(ret));
-            return AVERROR_EXTERNAL;
+            err = AVERROR_EXTERNAL;
+            goto fail;
         }
 
         f->queue_family[i] = p->nb_img_qfs > 1 ? VK_QUEUE_FAMILY_IGNORED : p->img_qfs[0];