wsi/display: check alloc failure in wsi_display_alloc_connector()

vulkancts test dEQP-VK.wsi.direct_drm.surface.create_simulate_oom is failing
because in wsi_display_alloc_connector() function memory allocation for
connector is not checked for return NULL. create_simulate_oom test simulates
out of memory, hence memory allocation fails for connector and later when
tried to dereference connector program will segfault.

This patch fixes the dEQP-VK.wsi.direct_drm.surface.create_simulate_oom test
segfault issue by checking if connector is NULL afer memory allocation.

Cc: mesa-stable
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21701>

diff --git a/src/vulkan/wsi/wsi_common_display.c b/src/vulkan/wsi/wsi_common_display.c
index 6a27ae0..7a2a918 100644 (file)
--- a/src/vulkan/wsi/wsi_common_display.c
+++ b/src/vulkan/wsi/wsi_common_display.c
@@ -302,6 +302,8 @@ wsi_display_alloc_connector(struct wsi_display *wsi,
    struct wsi_display_connector *connector =
       vk_zalloc(wsi->alloc, sizeof (struct wsi_display_connector),
                 8, VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
+   if (!connector)
+      return NULL;
 
    connector->id = connector_id;
    connector->wsi = wsi;