linux-kernel - [RFC 10/12] KVM: arm/arm64: Check all vcpu redistributors are set on map

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1521451220-27754-11-git-send-email-eric.auger@redhat.com>
Date:   Mon, 19 Mar 2018 10:20:18 +0100
From:   Eric Auger <eric.auger@...hat.com>
To:     eric.auger.pro@...il.com, eric.auger@...hat.com,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        kvmarm@...ts.cs.columbia.edu, marc.zyngier@....com,
        cdall@...nel.org, peter.maydell@...aro.org
Cc:     andre.przywara@....com, drjones@...hat.com, wei@...hat.com
Subject: [RFC 10/12] KVM: arm/arm64: Check all vcpu redistributors are set on map_resources

On vcpu first run, we eventually know the actual number of vcpus.
This is a synchronization point to check all redistributors regions
were assigned. On kvm_vgic_map_resources() we check both dist and
redist were set, eventually check potential base address inconsistencies.

Signed-off-by: Eric Auger <eric.auger@...hat.com>
---
 virt/kvm/arm/vgic/vgic-v3.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 547fab6..45fb87d 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -475,16 +475,25 @@ struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
 
 int vgic_v3_map_resources(struct kvm *kvm)
 {
-	int ret = 0;
 	struct vgic_dist *dist = &kvm->arch.vgic;
-	struct vgic_redist_region *rdreg =
-		list_first_entry(&dist->rd_regions,
-				 struct vgic_redist_region, list);
+	struct kvm_vcpu *vcpu;
+	int ret = 0;
+	int c;
 
 	if (vgic_ready(kvm))
 		goto out;
 
-	if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base) || !rdreg) {
+	kvm_for_each_vcpu(c, vcpu, kvm) {
+		struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
+
+		if (IS_VGIC_ADDR_UNDEF(vgic_cpu->rd_iodev.base_addr)) {
+			kvm_err("vcpu %d redistributor base not set\n", c);
+			ret = -ENXIO;
+			goto out;
+		}
+	}
+
+	if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base)) {
 		kvm_err("Need to set vgic distributor addresses first\n");
 		ret = -ENXIO;
 		goto out;
-- 
2.5.5