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Commit 9153ab72 authored by Eric Auger's avatar Eric Auger Committed by Marc Zyngier
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KVM: arm/arm64: Set dist->spis to NULL after kfree 



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 more than once
and on the second time it causes a "kernel BUG at mm/slub.c:3912!"

Set dist->spis to NULL to avoid the crash.

Fixes: ad275b8b ("KVM: arm/arm64: vgic-new: vgic_init: implement
vgic_init")

Signed-off-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent cf412b00

virt/kvm/arm/vgic/vgic-init.c

+1 −0
Original line number Diff line number Diff line
@@ -308,6 +308,7 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm) 
	dist->initialized = false;



	kfree(dist->spis);

	dist->spis = NULL;

	dist->nr_spis = 0;



	if (vgic_supports_direct_msis(kvm))