[PATCH] hugetlb/cgroup: Fix copy/paste array assignment

[Kees Cook]

Fix mismatched array assignment, reported by an -Warray-bounds build:

mm/hugetlb_cgroup.c: In function '__hugetlb_cgroup_file_legacy_init':
mm/hugetlb_cgroup.c:850:35: error: array subscript 8 is above array bounds of 'struct cftype[8]' [-Werror=array-bounds ]
  850 |         cft = &h->cgroup_files_dfl[8];
      |                ~~~~~~~~~~~~~~~~~~~^~~
In file included from mm/hugetlb_cgroup.c:23:
./include/linux/hugetlb.h:625:23: note: while referencing 'cgroup_files_dfl'
  625 |         struct cftype cgroup_files_dfl[8];
      |                       ^~~~~~~~~~~~~~~~

Fixes: e45f4726bcad ("hugetlb: add hugetlb.*.numa_stat file")
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
 mm/hugetlb_cgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index 9eebe8df3c39..f9942841df18 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -847,7 +847,7 @@ static void __init __hugetlb_cgroup_file_legacy_init(int idx)
 	cft->read_u64 = hugetlb_cgroup_read_u64;
 
 	/* Add the numa stat file */
-	cft = &h->cgroup_files_dfl[8];
+	cft = &h->cgroup_files_legacy[8];
 	snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
 	cft->private = MEMFILE_PRIVATE(idx, 1);
 	cft->seq_show = hugetlb_cgroup_read_numa_stat;
-- 
2.30.2