[Xen-changelog] [xen stable-4.5] xen/arm: mm: Do not dump the p2m when mapping a foreign gfn

[patchbot@xxxxxxx]

commit ef89dc8c00087c8c1819e60bdad5527db70425e1
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Thu Aug 13 12:03:43 2015 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Wed Sep 2 14:03:31 2015 +0100

    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@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    (cherry picked from commit afc13fe5e21d18c09e44f8ae6f7f4484e9f1de7f)
---
 xen/arch/arm/mm.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 7d4ba0c..7d95961 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -1103,7 +1103,6 @@ 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;
         }
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.5

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