Re: [PATCH 1/3] x86/hyperv: allocate the hypercall page with only read and execute bits

[Wei Liu]

On Thu, Jun 18, 2020 at 08:43:05AM +0200, Christoph Hellwig wrote:
> Avoid a W^X violation cause by the fact that PAGE_KERNEL_EXEC includes the
> writable bit.
> 
> For this resurrect the removed PAGE_KERNEL_RX definitÑon, but as
> PAGE_KERNEL_ROX to match arm64 and powerpc.
> 
> Fixes: 78bb17f76edc ("x86/hyperv: use vmalloc_exec for the hypercall page")
> Reported-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Tested-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu@xxxxxxxxxx>