Mesa (master): radv: honour the number of properties available

[Dave Airlie]

Module: Mesa
Branch: master
Commit: a025c5b2c7c9c6862006b13c9b8ab46c3acf8e53
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a025c5b2c7c9c6862006b13c9b8ab46c3acf8e53

Author: Emil Velikov <emil.velikov at collabora.com>
Date:   Thu Nov 24 18:14:58 2016 +0000

radv: honour the number of properties available

Cap up-to the number of properties available while copying the data.
Otherwise we might crash and/or leak data.

Cc: Dave Airlie <airlied at redhat.com>
Cc: "13.0" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/amd/vulkan/radv_device.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 3559c30..f89fc9d 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -712,17 +712,15 @@ VkResult radv_EnumerateInstanceExtensionProperties(
 	uint32_t*                                   pPropertyCount,
 	VkExtensionProperties*                      pProperties)
 {
-	unsigned i;
 	if (pProperties == NULL) {
 		*pPropertyCount = ARRAY_SIZE(global_extensions);
 		return VK_SUCCESS;
 	}
 
-	for (i = 0; i < *pPropertyCount; i++)
-		memcpy(&pProperties[i], &global_extensions[i], sizeof(VkExtensionProperties));
+	*pPropertyCount = MIN2(*pPropertyCount, ARRAY_SIZE(global_extensions));
+	typed_memcpy(pProperties, global_extensions, *pPropertyCount);
 
-	*pPropertyCount = i;
-	if (i < ARRAY_SIZE(global_extensions))
+	if (*pPropertyCount < ARRAY_SIZE(global_extensions))
 		return VK_INCOMPLETE;
 
 	return VK_SUCCESS;
@@ -734,19 +732,17 @@ VkResult radv_EnumerateDeviceExtensionProperties(
 	uint32_t*                                   pPropertyCount,
 	VkExtensionProperties*                      pProperties)
 {
-	unsigned i;
-
 	if (pProperties == NULL) {
 		*pPropertyCount = ARRAY_SIZE(device_extensions);
 		return VK_SUCCESS;
 	}
 
-	for (i = 0; i < *pPropertyCount; i++)
-		memcpy(&pProperties[i], &device_extensions[i], sizeof(VkExtensionProperties));
+	*pPropertyCount = MIN2(*pPropertyCount, ARRAY_SIZE(device_extensions));
+	typed_memcpy(pProperties, device_extensions, *pPropertyCount);
 
-	*pPropertyCount = i;
-	if (i < ARRAY_SIZE(device_extensions))
+	if (*pPropertyCount < ARRAY_SIZE(device_extensions))
 		return VK_INCOMPLETE;
+
 	return VK_SUCCESS;
 }