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Message-ID: <CAJuCfpHFNBSteck_bWxHwXDzeqC7QLn6hks5PoMC4ytWbJO4tQ@mail.gmail.com>
Date: Wed, 17 Jan 2024 14:46:22 -0800
From: Suren Baghdasaryan <surenb@...gle.com>
To: Lokesh Gidra <lokeshgidra@...gle.com>
Cc: akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
linux-mm@...ck.org, linux-kernel@...r.kernel.org, selinux@...r.kernel.org,
kernel-team@...roid.com, aarcange@...hat.com, peterx@...hat.com,
david@...hat.com, axelrasmussen@...gle.com, bgeffon@...gle.com,
willy@...radead.org, jannh@...gle.com, kaleshsingh@...gle.com,
ngeoffray@...gle.com
Subject: Re: [PATCH] userfaultfd: fix return error if mmap_changing is
non-zero in MOVE ioctl
On Wed, Jan 17, 2024 at 2:39 PM Lokesh Gidra <lokeshgidra@...gle.com> wrote:
>
> To be consistent with other uffd ioctl's returning EAGAIN when
> mmap_changing is detected, we should change UFFDIO_MOVE to do the same.
>
> Signed-off-by: Lokesh Gidra <lokeshgidra@...gle.com>
Looks correct. Thanks for catching it!
Acked-by: Suren Baghdasaryan <surenb@...gle.com>
> ---
> fs/userfaultfd.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
> index 959551ff9a95..05c8e8a05427 100644
> --- a/fs/userfaultfd.c
> +++ b/fs/userfaultfd.c
> @@ -2047,7 +2047,7 @@ static int userfaultfd_move(struct userfaultfd_ctx *ctx,
> ret = move_pages(ctx, mm, uffdio_move.dst, uffdio_move.src,
> uffdio_move.len, uffdio_move.mode);
> else
> - ret = -EINVAL;
> + ret = -EAGAIN;
>
> mmap_read_unlock(mm);
> mmput(mm);
> --
> 2.43.0.429.g432eaa2c6b-goog
>
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