KVM: MMU: check kvm_mmu_pages and mmu_page_path indices (e23d3fef) · Commits · 戴 / test

arch/x86/kvm/mmu.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -1870,6 +1870,8 @@ static int __mmu_unsync_walk(struct kvm_mmu_page *sp,
		return nr_unsync_leaf;
		}

		#define INVALID_INDEX (-1)

		static int mmu_unsync_walk(struct kvm_mmu_page *sp,
		struct kvm_mmu_pages *pvec)
		{
		@@ -1877,7 +1879,7 @@ static int mmu_unsync_walk(struct kvm_mmu_page *sp,
		if (!sp->unsync_children)
		return 0;

		mmu_pages_add(pvec, sp, 0);
		mmu_pages_add(pvec, sp, INVALID_INDEX);
		return __mmu_unsync_walk(sp, pvec);
		}

		@@ -2026,6 +2028,8 @@ static int mmu_pages_first(struct kvm_mmu_pages *pvec,
		if (pvec->nr == 0)
		return 0;

		WARN_ON(pvec->page[0].idx != INVALID_INDEX);

		sp = pvec->page[0].sp;
		level = sp->role.level;
		WARN_ON(level == PT_PAGE_TABLE_LEVEL);
		@@ -2050,6 +2054,7 @@ static void mmu_pages_clear_parents(struct mmu_page_path *parents)
		if (!sp)
		return;

		WARN_ON(idx == INVALID_INDEX);
		clear_unsync_child_bit(sp, idx);
		level++;
		} while (!sp->unsync_children);