[PATCH AUTOSEL 4.19 02/14] drm/amdgpu: fix ucode out-of-bounds read warning

Sasha Levin
2024-08-01T00:40:44Z

From: Tim Huang <Tim.Huang@amd.com>

[ Upstream commit 8944acd0f9db33e17f387fdc75d33bb473d7936f ]

Clear warning that read ucode[] may out-of-bounds.

Signed-off-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 387f1cf1dc207..9e768ff392fec 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -212,6 +212,9 @@ static int amdgpu_cgs_get_firmware_info(struct cgs_device *cgs_device,
struct amdgpu_firmware_info *ucode;

id = fw_type_convert(cgs_device, type);
+ if (id >= AMDGPU_UCODE_ID_MAXIMUM)
+ return -EINVAL;
+
ucode = &adev->firmware.ucode[id];
if (ucode->fw == NULL)
return -EINVAL;
--
2.43.0