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mm/memory.c: initialise mmu_notifier_range correctly 

One of the paths in follow_pte_pmd() initialised the mmu_notifier_range
incorrectly.

Link: http://lkml.kernel.org/r/20190103002126.GM6310@bombadil.infradead.org
Fixes: ac46d4f3c4 ("mm/mmu_notifier: use structure for invalidate_range_start/end calls v2")
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Tested-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2019-01-08 15:23:25 -08:00 committed by Linus Torvalds
parent aff876dcf4
commit 1ed7293ac4
1 changed files with 2 additions and 2 deletions
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4
mm/memory.c
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@ -4099,8 +4099,8 @@ static int __follow_pte_pmd(struct mm_struct *mm, unsigned long address,
goto out;
if (range) {
range->start = address & PAGE_MASK;
range->end = range->start + PAGE_SIZE;
mmu_notifier_range_init(range, mm, address & PAGE_MASK,
(address & PAGE_MASK) + PAGE_SIZE);
mmu_notifier_invalidate_range_start(range);
}
ptep = pte_offset_map_lock(mm, pmd, address, ptlp);