KVM: Validate userspace_addr of memslot when registered

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This way, we can avoid checking the user space address many times when
we read the guest memory.

Although we can do the same for write if we check which slots are
writable, we do not care write now: reading the guest memory happens
more often than writing.

[avi: change VERIFY_READ to VERIFY_WRITE]

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Takuya Yoshikawa 2011-05-07 16:35:38 +09:00 • committed by Avi Kivity

parent 12cb814f3b

commit fa3d315a4c

2 changed files with 6 additions and 3 deletions

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arch/x86/kvm/paging_tmpl.h

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