linux-kernel - Re: [PATCH v3 2/3] mmap: Fix error paths with dup_anon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 6 Oct 2023 14:08:34 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     "Liam R. Howlett" <Liam.Howlett@...cle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Jann Horn <jannh@...gle.com>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>, stable@...r.kernel.org
Subject: Re: [PATCH v3 2/3] mmap: Fix error paths with dup_anon_vma()

On Tue, 3 Oct 2023 09:21:22 -0700 Suren Baghdasaryan <surenb@...gle.com> wrote:

> > @@ -633,7 +641,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
> >
> >                 remove_next = true;
> >                 vma_start_write(next);
> > -               ret = dup_anon_vma(vma, next);
> > +               ret = dup_anon_vma(vma, next, &anon_dup);
> >                 if (ret)
> >                         return ret;
> 
> Shouldn't the above be changed to a "goto nomem" instead of "return ret" ?

It looks OK to me as-is - dup_anon_vma() leaves anon_dup==NULL
when it returns error.