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fs/proc/task_mmu.c: fix make_uffd_wp_huge_pte() huge pte handling 

make_uffd_wp_huge_pte() should return after handling a huge_pte_none()
pte.

Link: https://lkml.kernel.org/r/66178124-ebdf-4e23-b8ca-ed3eb8030c81@lucifer.local
Fixes: 03bfbc3ad6 ("mm: remove is_hugetlb_entry_[migration, hwpoisoned]()")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: Vlastimil Babka <vbabka@suse.cz>
Closes: https://lkml.kernel.org/r/dc483db3-be4d-45f7-8b40-a28f5d8f5738@suse.cz
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes 2025-11-27 17:45:17 +00:00 committed by Andrew Morton
parent ce2bba8956
commit 12f0cd3933
1 changed files with 3 additions and 1 deletions
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4
fs/proc/task_mmu.c
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@ -2500,9 +2500,11 @@ static void make_uffd_wp_huge_pte(struct vm_area_struct *vma,
const unsigned long psize = huge_page_size(hstate_vma(vma));
softleaf_t entry;
if (huge_pte_none(ptent))
if (huge_pte_none(ptent)) {
set_huge_pte_at(vma->vm_mm, addr, ptep,
make_pte_marker(PTE_MARKER_UFFD_WP), psize);
return;
}
entry = softleaf_from_pte(ptent);
if (softleaf_is_hwpoison(entry) || softleaf_is_marker(entry))