Re: [PATCH 1/1] drm/hyperv: Fix address space leak when Hyper-V DRM device is removed

[Wei Liu]

On Mon, Feb 10, 2025 at 11:34:41AM -0800, mhkelley58@xxxxxxxxx wrote:
> From: Michael Kelley <mhklinux@xxxxxxxxxxx>
> 
> When a Hyper-V DRM device is probed, the driver allocates MMIO space for
> the vram, and maps it cacheable. If the device removed, or in the error
> path for device probing, the MMIO space is released but no unmap is done.
> Consequently the kernel address space for the mapping is leaked.
> 
> Fix this by adding iounmap() calls in the device removal path, and in the
> error path during device probing.
> 
> Fixes: f1f63cbb705d ("drm/hyperv: Fix an error handling path in hyperv_vmbus_probe()")
> Fixes: a0ab5abced55 ("drm/hyperv : Removing the restruction of VRAM allocation with PCI bar size")
> Signed-off-by: Michael Kelley <mhklinux@xxxxxxxxxxx>

Applied to hyperv-fixes. Thanks.