From 1ea644c8f93f3435760d8b88c25d56475d8b7778 Mon Sep 17 00:00:00 2001 From: Martin Kelly Date: Thu, 16 Oct 2014 20:48:11 -0700 Subject: [PATCH] x86/xen: panic on bad Xen-provided memory map Panic if Xen provides a memory map with 0 entries. Although this is unlikely, it is better to catch the error at the point of seeing the map than later on as a symptom of some other crash. Signed-off-by: Martin Kelly Signed-off-by: David Vrabel --- arch/x86/xen/setup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index af7216128d93..29834b3fd87f 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -595,6 +595,7 @@ char * __init xen_memory_setup(void) rc = 0; } BUG_ON(rc); + BUG_ON(memmap.nr_entries == 0); /* * Xen won't allow a 1:1 mapping to be created to UNUSABLE -- 2.20.1