From: Jérôme Glisse <jglisse@xxxxxxxxxx> Subject: mm/hmm: hmm_pfns_bad() was accessing wrong struct The private field of mm_walk struct point to an hmm_vma_walk struct and not to the hmm_range struct desired. Fix to get proper struct pointer. Link: http://lkml.kernel.org/r/20180323005527.758-6-jglisse@xxxxxxxxxx Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx> Cc: Evgeny Baskakov <ebaskakov@xxxxxxxxxx> Cc: Ralph Campbell <rcampbell@xxxxxxxxxx> Cc: Mark Hairgrove <mhairgrove@xxxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/hmm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN mm/hmm.c~mm-hmm-hmm_pfns_bad-was-accessing-wrong-struct mm/hmm.c --- a/mm/hmm.c~mm-hmm-hmm_pfns_bad-was-accessing-wrong-struct +++ a/mm/hmm.c @@ -336,7 +336,8 @@ static int hmm_pfns_bad(unsigned long ad unsigned long end, struct mm_walk *walk) { - struct hmm_range *range = walk->private; + struct hmm_vma_walk *hmm_vma_walk = walk->private; + struct hmm_range *range = hmm_vma_walk->range; hmm_pfn_t *pfns = range->pfns; unsigned long i; _