Re: [PATCH 1/3] x86/hyperv: allocate the hypercall page with only read and execute bits
From: Wei Liu <wei.liu@kernel.org>
Date: 2020-06-18 11:47:37
Also in:
linux-hyperv, linux-mm, lkml
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 definitіon, 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@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>Acked-by: Wei Liu <wei.liu@kernel.org> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel