kvm: initialize all of the kvm_debugregs structure before sending it to userspace

When calling the KVM_GET_DEBUGREGS ioctl, on some configurations, there
might be some unitialized portions of the kvm_debugregs structure that
could be copied to userspace.  Prevent this as is done in the other kvm
ioctls, by setting the whole structure to 0 before copying anything into
it.

Bonus is that this reduces the lines of code as the explicit flag
setting and reserved space zeroing out can be removed.

Cc: Sean Christopherson <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: stable <[email protected]>
Reported-by: Xingyuan Mo <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Message-Id: <[email protected]>
Tested-by: Xingyuan Mo <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

0 files changed, 0 insertions, 0 deletions