in case kvm_vgic_map_resources() fails, typically if the vgic
distributor is not defined, __kvm_vgic_destroy will be called
several times. Indeed kvm_vgic_map_resources() is called on
first vcpu run. As a result dist->spis is freeed twice and on
the second time it causes a "kernel BUG at mm/slub.c:3912!"
This patch avoids freeing dist->spis twice.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
virt/kvm/arm/vgic/vgic-init.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 743ca5c..38fd5f1 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -324,7 +324,10 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
dist->ready = false;
dist->initialized = false;
- kfree(dist->spis);
+ if (dist->spis) {
+ kfree(dist->spis);
+ dist->spis = NULL;
+ }
dist->nr_spis = 0;
if (vgic_supports_direct_msis(kvm))
--
2.5.5
