Commit c95e70e0 authored Sep 28, 2018 by Patrick Daly

mm: Fix false warnings from apply_to_page_range

This warning message is triggered when addr + size overflows to zero.
This has been observed to occur on ARM64 with CONFIG_RANDOMIZE_BASE=y
when the end of the linear address range is placed at ffffffffffffffff.

Change-Id: I57e34e522a4fc25ab43a0a00be6d0927ea4a1272
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent f6f026ce

mm/memory.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2271,7 +2271,7 @@ int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
		unsigned long end = addr + size;
		int err;

		if (WARN_ON(addr >= end))
		if (WARN_ON(addr >= end - 1))
		return -EINVAL;

		pgd = pgd_offset(mm, addr);