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(parent: cfb65c1) | patch
KVM: x86: do not pass poisoned hva to __kvm_set_memory_region
authorPaolo Bonzini <pbonzini@redhat.com>
Thu, 11 Jun 2020 18:01:51 +0000 (14:01 -0400)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 11 Jun 2020 18:02:02 +0000 (14:02 -0400)
commite0135a104c52ccc977bc04a972bc889e0298b068
treed2767c63e064f52559f792182767d77c1e5fd434tree | snapshot
parentcfb65c15d784d517b60b16ca917a42f68978740ccommit | diff
KVM: x86: do not pass poisoned hva to __kvm_set_memory_region

__kvm_set_memory_region does not use the hva at all, so trying to
catch use-after-delete is pointless and, worse, it fails access_ok
now that we apply it to all memslots including private kernel ones.
This fixes an AVIC regression.

Fixes: 09d952c971a5 ("KVM: check userspace_addr for all memslots")
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c diff | blob | history
Domain: System / Kernel;