Commit a31b531c authored by Anish Ghulati's avatar Anish Ghulati Committed by Sean Christopherson
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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: default avatarMingwei Zhang <mizhang@google.com>
Signed-off-by: default avatarAnish Ghulati <aghulati@google.com>
Link: https://lore.kernel.org/r/20230113220923.2834699-1-aghulati@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 36b02567

arch/x86/kvm/svm/sev.c

+1 −1
Original line number Diff line number Diff line
@@ -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;