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Howlett" To: Matthew Wilcox Cc: Andrew Morton , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jann Horn , Lorenzo Stoakes , Vlastimil Babka , Suren Baghdasaryan , stable@vger.kernel.org Subject: Re: [PATCH 1/3] mmap: Fix vma_iterator in error path of vma_merge() Message-ID: <20230927224210.5l52b3cj7dt6kvt2@revolver> Mail-Followup-To: "Liam R. 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 quiWrR0x 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Howlett wrote: > > +++ b/mm/mmap.c > > @@ -968,14 +968,14 @@ struct vm_area_struct *vma_merge(struct vma_iterator *vmi, struct mm_struct *mm, > > vma_pgoff = curr->vm_pgoff; > > vma_start_write(curr); > > remove = curr; > > - err = dup_anon_vma(next, curr); > > + err = dup_anon_vma(next, curr, &anon_dup); > > This isn't bisectable. dup_anon_vma() doesn't gain a third argument > until patch 2. Ah, I'll respin and retest. Sorry about that, Liam