Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into efi/core

Pull EFI fix from Matt Fleming:

 * Fix a boot crash reported by Mike Galbraith and Mike Krinkin. The
   new EFI memory map reservation code didn't align reservations to
   EFI_PAGE_SIZE boundaries causing bogus regions to be inserted into
   the global EFI memory map (Matt Fleming)

Signed-off-by: Ingo Molnar <mingo@kernel.org>

drivers/firmware/efi/memmap.c

@@ -225,6 +225,17 @@ void __init efi_memmap_insert(struct efi_memory_map *old_memmap, void *buf,
 	m_end = mem->range.end;
 	m_attr = mem->attribute;
 
+	/*
+	 * The EFI memory map deals with regions in EFI_PAGE_SIZE
+	 * units. Ensure that the region described by 'mem' is aligned
+	 * correctly.
+	 */
+	if (!IS_ALIGNED(m_start, EFI_PAGE_SIZE) ||
+	    !IS_ALIGNED(m_end + 1, EFI_PAGE_SIZE)) {
+		WARN_ON(1);
+		return;
+	}
+
 	for (old = old_memmap->map, new = buf;
 	     old < old_memmap->map_end;
 	     old += old_memmap->desc_size, new += old_memmap->desc_size) {