Drivers: hv: vmbus: Close timing hole that can corrupt per-cpu page
commit 13b9abfc upstream. Extend the disabling of preemption to include the hypercall so that another thread can't get the CPU and corrupt the per-cpu page used for hypercall arguments. Signed-off-by:Michael Kelley <mikelley@microsoft.com> Signed-off-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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9b5eaef1
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