7143fd3903
Fixes error because of missing autoconf.h when building os11.2 Factory. - bnc#609153 - xm migrate <domain_name> localhost -l fails on Windows VMs 21615-dont-save-xen-heap-pages.patch - Upstream fixes from Jan 21446-iommu-graceful-generic-fail.patch 21453-shadow-avoid-remove-all-after-teardown.patch 21456-compat-hvm-addr-check.patch 21492-x86-pirq-unbind.patch 21526-x86-nehalem-cpuid-mask.patch 21620-x86-signed-domain-irq.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=59
32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
# HG changeset patch
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# User Keir Fraser <keir.fraser@citrix.com>
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# Date 1274857281 -3600
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# Node ID 5addb6cb16fd64c664b1e3dd335c76b3426e05e9
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# Parent 459f35d8cac4f19e6eae0a7396f6c97e20ae955c
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x86 shadow: Avoid remove-all-shadows after shadow teardown
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If dom0 alters the p2m of a domain that's being destroyed, we can end
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up doing a remove-all-shadows after the shadow hash table has been
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freed. Since no hash table implies no shadows, just return
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immediately.
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Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
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--- a/xen/arch/x86/mm/shadow/common.c
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+++ b/xen/arch/x86/mm/shadow/common.c
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@@ -2173,8 +2173,13 @@ static void hash_foreach(struct vcpu *v,
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struct domain *d = v->domain;
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struct page_info *x;
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- /* Say we're here, to stop hash-lookups reordering the chains */
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ASSERT(shadow_locked_by_me(d));
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+
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+ /* Can be called via p2m code &c after shadow teardown. */
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+ if ( unlikely(!d->arch.paging.shadow.hash_table) )
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+ return;
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+
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+ /* Say we're here, to stop hash-lookups reordering the chains */
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ASSERT(d->arch.paging.shadow.hash_walking == 0);
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d->arch.paging.shadow.hash_walking = 1;
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