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Andres Beltran
adae1e931a
Pointers to ring-buffer packets sent by Hyper-V are used within the guest VM. Hyper-V can send packets with erroneous values or modify packet fields after they are processed by the guest. To defend against these scenarios, return a copy of the incoming VMBus packet after validating its length and offset fields in hv_pkt_iter_first(). In this way, the packet can no longer be modified by the host. Signed-off-by: Andres Beltran <[email protected]> Co-developed-by: Andrea Parri (Microsoft) <[email protected]> Signed-off-by: Andrea Parri (Microsoft) <[email protected]> Reviewed-by: Michael Kelley <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Wei Liu <[email protected]>