cannot access memory beyond end of bootstrap direct-map area

[Pascal Bouchareine <pascal@gandi.net>]

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Hi,

Investigating the above message during xen 3.3 boot, found we left
a wrong assumption [modules_length == (mod[n].end - mod[0].start)]
in move_memory call, leading to an access above BOOTSTRAP_DIRECTMAP_END
and this panic on x86_32.

In my understanding Keir's patch 18630 was fixing this kind of problem
and I'm wondering why this move_memory call didn't go away with it ?

If this were ok, attached patch fixes the panic on my system.

Cheers,
Pascal

-- 
\o/   Pascal Bouchareine - Gandi 
 g    0170393757           15, place de la Nation - 75011 Paris      

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Signed-off-by: Pascal Bouchareine <pascal@gandi.net>

diff -r d9289e28e5e7 xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c	Thu Aug 06 13:29:39 2009 +0100
+++ b/xen/arch/x86/setup.c	Thu Aug 27 18:53:08 2009 +0200
@@ -737,11 +737,6 @@ void __init __start_xen(unsigned long mb
         if ( !initial_images_start && (s < e) && ((e-s) >= modules_length) )
         {
             initial_images_end = e;
-            e = (e - modules_length) & PAGE_MASK;
-            initial_images_start = e;
-            move_memory(initial_images_start, 
-                        mod[0].mod_start, mod[mbi->mods_count-1].mod_end);
-            e += modules_length;
             for ( j = mbi->mods_count-1; j >= 0; j-- )
             {
                 e -= mod[j].mod_end - mod[j].mod_start;
@@ -749,6 +744,7 @@ void __init __start_xen(unsigned long mb
                 mod[j].mod_end += e - mod[j].mod_start;
                 mod[j].mod_start = e;
             }
+	    initial_images_start = e;
         }
 
         if ( !kexec_crash_area.start && (s < e) &&

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