[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] 32on64 vCPU cleanup fix
Since vcpu_destroy_pagetables() clears v->arch.guest_table for hvm vCPUs, it must be avoided to free the page with MFN zero. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx> Index: 2007-04-18/xen/arch/x86/domain.c =================================================================== --- 2007-04-18.orig/xen/arch/x86/domain.c 2007-04-26 13:52:22.000000000 +0200 +++ 2007-04-18/xen/arch/x86/domain.c 2007-04-26 13:53:14.000000000 +0200 @@ -252,9 +252,12 @@ static int setup_compat_l4(struct vcpu * static void release_compat_l4(struct vcpu *v) { - free_domheap_page(pagetable_get_page(v->arch.guest_table)); - v->arch.guest_table = pagetable_null(); - v->arch.guest_table_user = pagetable_null(); + if ( !pagetable_is_null(v->arch.guest_table) ) + { + free_domheap_page(pagetable_get_page(v->arch.guest_table)); + v->arch.guest_table = pagetable_null(); + v->arch.guest_table_user = pagetable_null(); + } } static inline int may_switch_mode(struct domain *d) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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