[PATCH] amdkfd: Check kvmalloc return before memcpy

[Deucher, Alexander]

[AMD Official Use Only - Internal Distribution Only]

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Kent Russell <kent.russell at amd.com>
Sent: Monday, November 2, 2020 11:27 AM
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Russell, Kent <Kent.Russell at amd.com>
Subject: [PATCH] amdkfd: Check kvmalloc return before memcpy

If we can't kvmalloc the pcrat_image, then we shouldn't memcpy

Signed-off-by: Kent Russell <kent.russell at amd.com>
Reported-by: kernel test robot <lkp at intel.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index cdd5032d5c0e..a0acf2310357 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -804,10 +804,10 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
         }

         pcrat_image = kvmalloc(crat_table->length, GFP_KERNEL);
-       memcpy(pcrat_image, crat_table, crat_table->length);
         if (!pcrat_image)
                 return -ENOMEM;

+       memcpy(pcrat_image, crat_table, crat_table->length);
         *crat_image = pcrat_image;
         *size = crat_table->length;

--
2.17.1

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