Mesa (master): anv: avoid segmentation fault due to vk_error()

[Samuel Iglesias Gonsálvez]

Module: Mesa
Branch: master
Commit: 7109a1fe132e5f79a25bb34f0f28a21cce3076db
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7109a1fe132e5f79a25bb34f0f28a21cce3076db

Author: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
Date:   Fri Jan 19 08:45:10 2018 +0100

anv: avoid segmentation fault due to vk_error()

vk_error() is a macro that calls __vk_errorf() with instance == NULL.

Then, __vk_errorf() passes a pointer to instance->debug_report_callbacks
to vk_debug_error(), which segfaults as this pointer is invalid but not
NULL.

Fixes: e5b1bd6ab8 "vulkan: move anv VK_EXT_debug_report implementation to common code."

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
Reviewed-by: Tapani Pälli <tapani.palli at intel.com>

---

 src/intel/vulkan/anv_util.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/intel/vulkan/anv_util.c b/src/intel/vulkan/anv_util.c
index 6b31224d7f..3c1803aa05 100644
--- a/src/intel/vulkan/anv_util.c
+++ b/src/intel/vulkan/anv_util.c
@@ -99,14 +99,16 @@ __vk_errorf(struct anv_instance *instance, const void *object,
       snprintf(report, sizeof(report), "%s:%d: %s", file, line, error_str);
    }
 
-   vk_debug_report(&instance->debug_report_callbacks,
-                   VK_DEBUG_REPORT_ERROR_BIT_EXT,
-                   type,
-                   (uint64_t) (uintptr_t) object,
-                   line,
-                   0,
-                   "anv",
-                   report);
+   if (instance) {
+      vk_debug_report(&instance->debug_report_callbacks,
+                      VK_DEBUG_REPORT_ERROR_BIT_EXT,
+                      type,
+                      (uint64_t) (uintptr_t) object,
+                      line,
+                      0,
+                      "anv",
+                      report);
+   }
 
    intel_loge("%s", report);