linux-kernel - Re: [PATCH for v6.3 regression] mm/mremap: fix vm_pgoff in vma

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Message-ID: <CAHk-=whwoKFbrCGXW9uwX3SPOezLdOKstuLAju1KTi5Ryq+ZcQ@mail.gmail.com>
Date:   Thu, 27 Apr 2023 19:53:48 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Greg KH <greg@...ah.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>, lstoakes@...il.com,
        regressions@...ts.linux.dev, linux-mm@...ck.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Jiri Slaby <jirislaby@...nel.org>,
        Fabian Vogt <fvogt@...e.com>, stable@...r.kernel.org
Subject: Re: [PATCH for v6.3 regression] mm/mremap: fix vm_pgoff in
 vma_merge() case 3

Hi Vlastimil,

On Thu, Apr 27, 2023 at 8:12 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Ack. It's in my tree as commit 7e7757876f25 right now (not pushed out
> yet, will do the usual build tests and look around for other things
> pending).

Gaah. I just merged Andrew's MM tree, and while it had a lot of small
conflicts (and the ext4 ones were annoying semantic ones), the only
one that was in *confusing* code was the one introduced by this
one-liner fix.

I'm pretty sure I did the right thing, particularly given your other
patch for the mm tree, but please humor me and take a look at it?

That 'vma_merge()' function is the function from hell.

I haven't pushed out yet because it's still going through my build
tests, but it should be out soon.

                       Linus