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 <martkell@amazon.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Martin Kelly 2014-10-16 20:48:11 -07:00 коммит произвёл David Vrabel
Родитель 3251f20b89
Коммит 1ea644c8f9
1 изменённых файлов: 1 добавлений и 0 удалений

Просмотреть файл

@ -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