tu: fix tu_GetInstanceProcAddr not handling null instance

It is legal to pass in nullptr as an instance into
vkGetInstanceProcAddr when resolving any global addresses, this
wasn't handled correctly and an illegal access to a member of
a null struct was made.

Signed-off-by: Mark Collins <mark@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21827>

diff --git a/src/freedreno/vulkan/tu_device.c b/src/freedreno/vulkan/tu_device.c
index 9d25cca..3b82ec5 100644 (file)
--- a/src/freedreno/vulkan/tu_device.c
+++ b/src/freedreno/vulkan/tu_device.c
@@ -2515,7 +2515,7 @@ VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL
 tu_GetInstanceProcAddr(VkInstance _instance, const char *pName)
 {
    TU_FROM_HANDLE(tu_instance, instance, _instance);
-   return vk_instance_get_proc_addr(&instance->vk,
+   return vk_instance_get_proc_addr(instance != NULL ? &instance->vk : NULL,
                                     &tu_instance_entrypoints,
                                     pName);
 }