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mm/hugetlb: fix potential missing huge page size info
commit0eb98f1588
upstream. 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@huawei.com Fixes:aa50d3a7aa
("Encode huge page size for VM_FAULT_HWPOISON errors") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.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>
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@ -4372,7 +4372,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
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* So we need to block hugepage fault by PG_hwpoison bit check.
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*/
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if (unlikely(PageHWPoison(page))) {
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ret = VM_FAULT_HWPOISON |
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ret = VM_FAULT_HWPOISON_LARGE |
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VM_FAULT_SET_HINDEX(hstate_index(h));
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goto backout_unlocked;
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}
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