From: Rhys Perry <pendingchaos02@gmail.com>
Date: Wed, 5 Aug 2020 20:03:22 +0000 (+0100)
Subject: radv: don't pass null to _mesa_sha1_update
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=4f08af6766c23295922a08a95d0183820f7bc702

radv: don't pass null to _mesa_sha1_update

This could then pass NULL to memcpy. Fixes UBSan error:
../src/util/sha1/sha1.c:140:8: runtime error: null pointer passed as argument 2, which is declared to never be null

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6206>
---

diff --git a/src/amd/vulkan/radv_pipeline_cache.c b/src/amd/vulkan/radv_pipeline_cache.c
index 8cbf312019c..fe38f301009 100644
--- a/src/amd/vulkan/radv_pipeline_cache.c
+++ b/src/amd/vulkan/radv_pipeline_cache.c
@@ -133,7 +133,7 @@ radv_hash_shaders(unsigned char *hash,
 
 			_mesa_sha1_update(&ctx, module->sha1, sizeof(module->sha1));
 			_mesa_sha1_update(&ctx, stages[i]->pName, strlen(stages[i]->pName));
-			if (spec_info) {
+			if (spec_info && spec_info->mapEntryCount) {
 				_mesa_sha1_update(&ctx, spec_info->pMapEntries,
 				                  spec_info->mapEntryCount * sizeof spec_info->pMapEntries[0]);
 				_mesa_sha1_update(&ctx, spec_info->pData, spec_info->dataSize);