Merge tag 'pm-5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (3a83c8c8) · Commits · 戴 / test

Pull power management fix from Rafael Wysocki: "Prevent the kernel from crashing during resume from hibernation if free pages contain leftover data from the restore kernel and init_on_free is set (Alexander Potapenko)" * tag 'pm-5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM: hibernate: fix crashes with init_on_free=1

kernel/power/snapshot.c

+10 −10

Original line number	Diff line number	Diff line
		@@ -1147,13 +1147,13 @@ void free_basic_memory_bitmaps(void)

		void clear_free_pages(void)
		{
		#ifdef CONFIG_PAGE_POISONING_ZERO
		struct memory_bitmap *bm = free_pages_map;
		unsigned long pfn;

		if (WARN_ON(!(free_pages_map)))
		return;

		if (IS_ENABLED(CONFIG_PAGE_POISONING_ZERO) \|\| want_init_on_free()) {
		memory_bm_position_reset(bm);
		pfn = memory_bm_next_pfn(bm);
		while (pfn != BM_END_OF_MAP) {
		@@ -1164,7 +1164,7 @@ void clear_free_pages(void)
		}
		memory_bm_position_reset(bm);
		pr_info("free pages cleared after restore\n");
		#endif /* PAGE_POISONING_ZERO */
		}
		}

		/**

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