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KVM: SVM: Account scratch allocations used to decrypt SEV guest memory 

Account the temp/scratch allocation used to decrypt unaligned debug
accesses to SEV guest memory, the allocation is very much tied to the
target VM.

Reported-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Anish Ghulati <aghulati@google.com>
Link: https://lore.kernel.org/r/20230113220923.2834699-1-aghulati@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Anish Ghulati 2023-01-13 22:09:23 +00:00 committed by Sean Christopherson
parent 36b0256789
commit a31b531cd2
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/svm/sev.c
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@ -813,7 +813,7 @@ static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr,
if (!IS_ALIGNED(dst_paddr, 16) ||
!IS_ALIGNED(paddr, 16) ||
!IS_ALIGNED(size, 16)) {
tpage = (void *)alloc_page(GFP_KERNEL | __GFP_ZERO);
tpage = (void *)alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);
if (!tpage)
return -ENOMEM;