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31 lines
1 KiB
Diff
31 lines
1 KiB
Diff
From: Oleksandr Tyshchenko <olekstysh@gmail.com>
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Subject: IOMMU: always call teardown callback
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There is a possible scenario when (d)->need_iommu remains unset
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during guest domain execution. For example, when no devices
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were assigned to it. Taking into account that teardown callback
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is not called when (d)->need_iommu is unset we might have unreleased
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resourses after destroying domain.
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So, always call teardown callback to roll back actions
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that were performed in init callback.
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This is XSA-207.
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Signed-off-by: Oleksandr Tyshchenko <olekstysh@gmail.com>
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Reviewed-by: Jan Beulich <jbeulich@suse.com>
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Tested-by: Jan Beulich <jbeulich@suse.com>
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Tested-by: Julien Grall <julien.grall@arm.com>
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--- a/xen/drivers/passthrough/iommu.c
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+++ b/xen/drivers/passthrough/iommu.c
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@@ -244,8 +244,7 @@ void iommu_domain_destroy(struct domain
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if ( !iommu_enabled || !dom_iommu(d)->platform_ops )
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return;
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- if ( need_iommu(d) )
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- iommu_teardown(d);
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+ iommu_teardown(d);
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arch_iommu_domain_destroy(d);
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}
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