tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: KVM: Enforce hyp requests alignment

Browse Source 
Prevent the host from sharing an unaligned
hypervisor request buffer to avoid spilling
into the adjacent page.

Bug: 436580278
Change-Id: I62283dba1d5907718dbf6d549817a94cc18fca19
Signed-off-by: Sebastian Ene <sebastianene@google.com>
This commit is contained in:
Sebastian Ene
2025-08-07 10:25:50 +00:00
parent 05c9d94160
commit e76cff4952
1 changed files with 8 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/kvm/hyp/nvhe/pkvm.c
+8 -1
View File
@@ -670,11 +670,18 @@ static int init_pkvm_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu,
{
int ret = 0;
u32 mp_state;
struct kvm_hyp_req *hyp_reqs;
if (hyp_pin_shared_mem(host_vcpu, host_vcpu + 1))
return -EBUSY;
hyp_vcpu->vcpu.arch.hyp_reqs = kern_hyp_va(host_vcpu->arch.hyp_reqs);
hyp_reqs = READ_ONCE(host_vcpu->arch.hyp_reqs);
if (!PAGE_ALIGNED(hyp_reqs)) {
hyp_unpin_shared_mem(host_vcpu, host_vcpu + 1);
return -EINVAL;
}
hyp_vcpu->vcpu.arch.hyp_reqs = kern_hyp_va(hyp_reqs);
if (hyp_pin_shared_mem(hyp_vcpu->vcpu.arch.hyp_reqs,
hyp_vcpu->vcpu.arch.hyp_reqs + 1)) {
hyp_unpin_shared_mem(host_vcpu, host_vcpu + 1);