Patch "drm/amdgpu: Fix shared buff copy to user" has been added to the 6.6-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 shared buff copy to user

to the 6.6-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-shared-buff-copy-to-user.patch
and it can be found in the queue-6.6 subdirectory.

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



commit 650a3b085ccbd870d6fe5e166a30c87eaa8519bc
Author: Stanley.Yang <Stanley.Yang@xxxxxxx>
Date:   Mon Feb 5 15:55:48 2024 +0800

    drm/amdgpu: Fix shared buff copy to user
    
    [ Upstream commit 2dcf82a8e8dc930655787797ef8a3692b527c7a9 ]
    
    ta if invoke node buffer
    |-------- ta type ----------|
    |--------  ta id  ----------|
    |-------- cmd  id ----------|
    |------ shared buf len -----|
    |------ shared buffer ------|
    
    ta if invoke node buffer is as above, copy shared buffer data to correct location
    
    Signed-off-by: Stanley.Yang <Stanley.Yang@xxxxxxx>
    Reviewed-by: Hawking Zhang <Hawking.Zhang@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_psp_ta.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
index 468a67b302d4c..ca5c86e5f7cd6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
@@ -362,7 +362,7 @@ static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size
 		}
 	}
 
-	if (copy_to_user((char *)buf, context->mem_context.shared_buf, shared_buf_len))
+	if (copy_to_user((char *)&buf[copy_pos], context->mem_context.shared_buf, shared_buf_len))
 		ret = -EFAULT;
 
 err_free_shared_buf:




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