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authorAndrew Jones <drjones@redhat.com>2019-04-04 19:42:30 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-25 18:22:27 +0200
commite6ae439228972264d28461ab1a36d9ffd1b78261 (patch)
tree7b59fbae7966c7e35b26df535c7c20c70ef6faf9 /virt/kvm/arm/arm.c
parent5450811a02f53b1e2b3b3a2a297f7af5f3e51623 (diff)
KVM: arm/arm64: Ensure vcpu target is unset on reset failure
[ Upstream commit 811328fc3222f7b55846de0cd0404339e2e1e6d7 ] A failed KVM_ARM_VCPU_INIT should not set the vcpu target, as the vcpu target is used by kvm_vcpu_initialized() to determine if other vcpu ioctls may proceed. We need to set the target before calling kvm_reset_vcpu(), but if that call fails, we should then unset it and clear the feature bitmap while we're at it. Signed-off-by: Andrew Jones <drjones@redhat.com> [maz: Simplified patch, completed commit message] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'virt/kvm/arm/arm.c')
-rw-r--r--virt/kvm/arm/arm.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 9c486fad3f9f..6202b4f718ce 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -949,7 +949,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
const struct kvm_vcpu_init *init)
{
- unsigned int i;
+ unsigned int i, ret;
int phys_target = kvm_target_cpu();
if (init->target != phys_target)
@@ -984,9 +984,14 @@ static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
vcpu->arch.target = phys_target;
/* Now we know what it is, we can reset it. */
- return kvm_reset_vcpu(vcpu);
-}
+ ret = kvm_reset_vcpu(vcpu);
+ if (ret) {
+ vcpu->arch.target = -1;
+ bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
+ }
+ return ret;
+}
static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
struct kvm_vcpu_init *init)