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| author | Eric Auger <eric.auger@redhat.com> | 2018-05-22 09:55:06 +0200 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-05-25 12:29:26 +0100 |
| commit | 9153ab724ea1f47840cab0cedb12683b37272067 (patch) | |
| tree | 3176a1241438ad79a6e95f9d51f7e1ad0335dd57 /virt | |
| parent | cf412b0070221032c02c4564cd11dc83238b2ad2 (diff) | |
| download | linux-9153ab724ea1f47840cab0cedb12683b37272067.tar.gz linux-9153ab724ea1f47840cab0cedb12683b37272067.tar.bz2 linux-9153ab724ea1f47840cab0cedb12683b37272067.zip | |
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: ad275b8bb1e6 ("KVM: arm/arm64: vgic-new: vgic_init: implement
vgic_init")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-init.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index e07156c30323..9a5aed7eecfd 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -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)) |