From: Miaohe Lin <linmiaohe@xxxxxxxxxx> Subject: mm/hugetlb: fix potential missing huge page size info The huge page size is encoded for VM_FAULT_HWPOISON errors only. So if we return VM_FAULT_HWPOISON, huge page size would just be ignored. Link: https://lkml.kernel.org/r/20210107123449.38481-1-linmiaohe@xxxxxxxxxx Fixes: aa50d3a7aa81 ("Encode huge page size for VM_FAULT_HWPOISON errors") Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/hugetlb.c~mm-hugetlb-fix-potential-missing-huge-page-size-info +++ a/mm/hugetlb.c @@ -4371,7 +4371,7 @@ retry: * So we need to block hugepage fault by PG_hwpoison bit check. */ if (unlikely(PageHWPoison(page))) { - ret = VM_FAULT_HWPOISON | + ret = VM_FAULT_HWPOISON_LARGE | VM_FAULT_SET_HINDEX(hstate_index(h)); goto backout_unlocked; } _
