From: Julien Grall <julien.grall@citrix.com>

Date: Thu, 13 Aug 2015 12:03:43 +0100

Subject: [PATCH] xen/arm: mm: Do not dump the p2m when mapping a foreign gfn

The physmap operation XENMAPSPACE_gfmn_foreign is dumping the p2m when

an error occured by calling dump_p2m_lookup. But this function is not

using ratelimited printk.

Any domain able to map foreign gfmn would be able to flood the Xen

console.

The information wasn't not useful so drop it.

This is XSA-141.

Signed-off-by: Julien Grall <julien.grall@citrix.com>

Acked-by: Ian Campbell <ian.campbell@citrix.com>

---

 xen/arch/arm/mm.c | 1 -

 1 file changed, 1 deletion(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c

index ae0f34c..d00d526 100644

--- a/xen/arch/arm/mm.c

+++ b/xen/arch/arm/mm.c

@@ -1114,7 +1114,6 @@ int xenmem_add_to_physmap_one(

         page = get_page_from_gfn(od, idx, &p2mt, P2M_ALLOC);

         if ( !page )

         {

-            dump_p2m_lookup(od, pfn_to_paddr(idx));

             rcu_unlock_domain(od);

             return -EINVAL;

         }

-- 

2.1.4