Commit 9cb65bc3 authored Mar 15, 2016 by Mika Penttilä Committed by Linus Torvalds Mar 15, 2016

mm/memory.c: make apply_to_page_range() more robust



Arm and arm64 used to trigger this BUG_ON() - this has now been fixed.

But a WARN_ON() here is sufficient to catch future buggy callers.

Signed-off-by: Mika Penttilä <mika.penttila@nextfour.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 4355c018

mm/memory.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1876,7 +1876,9 @@ int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
		unsigned long end = addr + size;
		int err;

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

		pgd = pgd_offset(mm, addr);
		do {
		next = pgd_addr_end(addr, end);

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