Patch "drm/amdgpu: fix ucode out-of-bounds read warning" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amdgpu: fix ucode out-of-bounds read warning

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-fix-ucode-out-of-bounds-read-warning.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7a66b2ae9f8e3604987357af54825552dbe280bb
Author: Tim Huang <Tim.Huang@xxxxxxx>
Date:   Mon May 6 16:21:00 2024 +0800

    drm/amdgpu: fix ucode out-of-bounds read warning
    
    [ Upstream commit 8944acd0f9db33e17f387fdc75d33bb473d7936f ]
    
    Clear warning that read ucode[] may out-of-bounds.
    
    Signed-off-by: Tim Huang <Tim.Huang@xxxxxxx>
    Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 387f1cf1dc20..9e768ff392fe 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;




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