[Xen-changelog] [xen master] x86: fix domain cleanup

[patchbot@xxxxxxx]

commit a29e895b2bde17ab239da3bff76ec00c8d9b2e77
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Apr 29 18:30:22 2016 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Apr 29 18:30:22 2016 +0200

    x86: fix domain cleanup
    
    Free d->arch.cpuids on both the creation error path and during
    destruction.
    
    Don't bypass iommu_domain_destroy().
    
    Move psr_domain_init() up so that hvm_domain_initialise() again is the
    last thing which can fail, and hence doesn't require undoing later on.
    
    Move psr_domain_free() up on the creation error path, so that cleanup
    once again gets done in reverse order of setup.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/domain.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index d13b272..5af2cc5 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -648,21 +648,18 @@ int arch_domain_create(struct domain *d, unsigned int 
domcr_flags,
     }
     spin_lock_init(&d->arch.e820_lock);
 
+    if ( (rc = psr_domain_init(d)) != 0 )
+        goto fail;
+
     if ( has_hvm_container_domain(d) )
     {
         if ( (rc = hvm_domain_initialise(d)) != 0 )
-        {
-            iommu_domain_destroy(d);
             goto fail;
-        }
     }
     else
         /* 64-bit PV guest by default. */
         d->arch.is_32bit_pv = d->arch.has_32bit_shinfo = 0;
 
-    if ( (rc = psr_domain_init(d)) != 0 )
-        goto fail;
-
     /* initialize default tsc behavior in case tools don't */
     tsc_set_info(d, TSC_MODE_DEFAULT, 0UL, 0, 0);
     spin_lock_init(&d->arch.vtsc_lock);
@@ -680,8 +677,11 @@ int arch_domain_create(struct domain *d, unsigned int 
domcr_flags,
 
  fail:
     d->is_dying = DOMDYING_dead;
+    psr_domain_free(d);
+    iommu_domain_destroy(d);
     cleanup_domain_irq_mapping(d);
     free_xenheap_page(d->shared_info);
+    xfree(d->arch.cpuids);
     if ( paging_initialised )
         paging_final_teardown(d);
     free_perdomain_mappings(d);
@@ -690,7 +690,6 @@ int arch_domain_create(struct domain *d, unsigned int 
domcr_flags,
         xfree(d->arch.pv_domain.cpuidmasks);
         free_xenheap_page(d->arch.pv_domain.gdt_ldt_l1tab);
     }
-    psr_domain_free(d);
     return rc;
 }
 
@@ -700,6 +699,7 @@ void arch_domain_destroy(struct domain *d)
         hvm_domain_destroy(d);
 
     xfree(d->arch.e820);
+    xfree(d->arch.cpuids);
 
     free_domain_pirqs(d);
     if ( !is_idle_domain(d) )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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