Commit 79c2fd2a authored Jul 28, 2020 by Arvind Sankar Committed by Ingo Molnar Jul 31, 2020

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

parent bf457be1

arch/x86/boot/compressed/kaslr.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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++;

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