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SUSE:SLE-12-SP2:GA
xen.7653
xsa232.patch
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File xsa232.patch of Package xen.7653
From: Andrew Cooper <andrew.cooper3@citrix.com> Subject: grant_table: fix GNTTABOP_cache_flush handling Don't fall over a NULL grant_table pointer when the owner of the domain is a system domain (DOMID_{XEN,IO} etc). This is XSA-232. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Index: xen-4.5.5-testing/xen/common/grant_table.c =================================================================== --- xen-4.5.5-testing.orig/xen/common/grant_table.c +++ xen-4.5.5-testing/xen/common/grant_table.c @@ -2620,7 +2620,7 @@ static int __gnttab_cache_flush(gnttab_c page = mfn_to_page(mfn); owner = page_get_owner_and_reference(page); - if ( !owner ) + if ( !owner || !owner->grant_table ) { rcu_unlock_domain(d); return -EPERM;
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