From: Jesse Zhang <jesse.zh...@amd.com>
[ Upstream commit c09d2eff81a997c169e0cacacd6b60c5e3aa33f2 ]
Potentially overflowing expression mall_size_per_umc * adev->gmc.num_umc with
type unsigned int (32 bits, unsigned)
is evaluated using 32-bit arithmetic,and then used in a context that expects an
expression of type u64 (64 bits, unsigned).
Signed-off-by: Jesse Zhang <jesse.zh...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index cf2faeae1d0db..b04d789bfd100 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -1550,7 +1550,7 @@ static int amdgpu_discovery_get_mall_info(struct
amdgpu_device *adev)
break;
case 2:
mall_size_per_umc =
le32_to_cpu(mall_info->v2.mall_size_per_umc);
- adev->gmc.mall_size = mall_size_per_umc * adev->gmc.num_umc;
+ adev->gmc.mall_size = (uint64_t)mall_size_per_umc *
adev->gmc.num_umc;
break;
default:
dev_err(adev->dev,
--
2.43.0
