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ANDROID: KVM: arm64: Fix error path in pkvm_mem_abort()

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On one error path, pin_user_pages has succeeded and should be
undone.

Bug: 310131277
Change-Id: I92fe0c54bb5b8005f848491f5e9be1090b61fbd1
Signed-off-by: Keir Fraser <keirf@google.com>
This commit is contained in:
Keir Fraser
2023-11-10 09:22:41 +00:00
parent 27aaaa9af5
commit b7bcf839e1
1 changed files with 4 additions and 3 deletions
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7
arch/arm64/kvm/mmu.c
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@@ -1388,7 +1388,7 @@ static int pkvm_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
* prevent try_to_unmap() from succeeding.
*/
ret = -EIO;
goto dec_account;
goto unpin;
}
write_lock(&kvm->mmu_lock);
@@ -1397,7 +1397,7 @@ static int pkvm_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
if (ret) {
if (ret == -EAGAIN)
ret = 0;
goto unpin;
goto unlock;
}
ppage->page = page;
@@ -1407,8 +1407,9 @@ static int pkvm_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
return 0;
unpin:
unlock:
write_unlock(&kvm->mmu_lock);
unpin:
unpin_user_pages(&page, 1);
dec_account:
account_locked_vm(mm, 1, false);