x86/kaslr: Fix off-by-one error in process_gb_huge_pages()

If the remaining size of the region is exactly 1Gb, there is still one
hugepage that can be reserved.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200728225722.67457-11-nivedita@alum.mit.edu

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index d074986..0df513e 100644 (file)
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -562,7 +562,7 @@ process_gb_huge_pages(struct mem_vector *region, unsigned long image_size)
                size = region->size - (addr - region->start);
 
        /* Check how many 1GB huge pages can be filtered out: */
-       while (size > PUD_SIZE && max_gb_huge_pages) {
+       while (size >= PUD_SIZE && max_gb_huge_pages) {
                size -= PUD_SIZE;
                max_gb_huge_pages--;
                i++;