Commit 87ec7d52 authored by Radim Krčmář's avatar Radim Krčmář Committed by Anup Patel
Browse files

KVM: RISC-V: reset smstateen CSRs 



Not resetting smstateen is a potential security hole, because VU might
be able to access state that VS does not properly context-switch.

Fixes: 81f0f314 ("RISCV: KVM: Add sstateen0 context save/restore")
Signed-off-by: default avatarRadim Krčmář <rkrcmar@ventanamicro.com>
Link: https://lore.kernel.org/r/20250403112522.1566629-8-rkrcmar@ventanamicro.com


Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent b4432656

arch/riscv/kvm/vcpu.c

+2 −0
Original line number Diff line number Diff line
@@ -77,6 +77,8 @@ static void kvm_riscv_reset_vcpu(struct kvm_vcpu *vcpu) 
	memcpy(cntx, reset_cntx, sizeof(*cntx));

	spin_unlock(&vcpu->arch.reset_cntx_lock);



	memset(&vcpu->arch.smstateen_csr, 0, sizeof(vcpu->arch.smstateen_csr));



	kvm_riscv_vcpu_fp_reset(vcpu);



	kvm_riscv_vcpu_vector_reset(vcpu);