From: Jérôme Glisse <jglisse@redhat.com>
Date: Tue, 10 Apr 2018 23:28:27 +0000 (-0700)
Subject: mm/hmm: hmm_pfns_bad() was accessing wrong struct
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=28cb085f1598956b5b29edb7f220ce9e0d827762;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

mm/hmm: hmm_pfns_bad() was accessing wrong struct

commit c719547f032d4610c7a20900baacae26d0b1ff3e upstream.

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@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/mm/hmm.c b/mm/hmm.c
index a88a847bccba..81ff1dbbf8a8 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -277,7 +277,8 @@ static int hmm_pfns_bad(unsigned long addr,
 			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;