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Howlett" Link: https://lkml.kernel.org/r/20220504011345.662299-43-Liam.Howlett@oracl= e.com Signed-off-by: Liam R. Howlett Acked-by: Vlastimil Babka Cc: Catalin Marinas Cc: David Howells Cc: "Matthew Wilcox (Oracle)" Cc: SeongJae Park Cc: Will Deacon Cc: Davidlohr Bueso Signed-off-by: Andrew Morton --- mm/mprotect.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/mprotect.c b/mm/mprotect.c index ba5592655ee3..27fb652151e4 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -621,6 +621,7 @@ static int do_mprotect_pkey(unsigned long start, size_t= len, const bool rier =3D (current->personality & READ_IMPLIES_EXEC) && (prot & PROT_READ); struct mmu_gather tlb; + MA_STATE(mas, ¤t->mm->mm_mt, start, start); =20 start =3D untagged_addr(start); =20 @@ -652,7 +653,7 @@ static int do_mprotect_pkey(unsigned long start, size_t= len, if ((pkey !=3D -1) && !mm_pkey_is_allocated(current->mm, pkey)) goto out; =20 - vma =3D find_vma(current->mm, start); + vma =3D mas_find(&mas, ULONG_MAX); error =3D -ENOMEM; if (!vma) goto out; @@ -678,7 +679,7 @@ static int do_mprotect_pkey(unsigned long start, size_t= len, if (start > vma->vm_start) prev =3D vma; else - prev =3D vma->vm_prev; + prev =3D mas_prev(&mas, 0); =20 tlb_gather_mmu(&tlb, current->mm); for (nstart =3D start ; ; ) { @@ -741,7 +742,7 @@ static int do_mprotect_pkey(unsigned long start, size_t= len, if (nstart >=3D end) break; =20 - vma =3D prev->vm_next; + vma =3D find_vma(current->mm, prev->vm_end); if (!vma || vma->vm_start !=3D nstart) { error =3D -ENOMEM; break; --=20 2.35.1