netdev - Re: [PATCH] xsk: fix out of boundary write in __xsk_rcv

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Message-ID: <CAJ+HfNjTaWp+=na14mjMzpbRzM2Ea5wK_MNJddFNEJ59XDLPNw@mail.gmail.com>
Date:   Fri, 3 Apr 2020 10:29:50 +0200
From:   Björn Töpel <bjorn.topel@...il.com>
To:     Jonathan Lemon <jonathan.lemon@...il.com>
Cc:     Li RongQing <lirongqing@...du.com>,
        Netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Kevin Laatz <kevin.laatz@...el.com>,
        Ciara Loftus <ciara.loftus@...el.com>,
        Bruce Richardson <bruce.richardson@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH] xsk: fix out of boundary write in __xsk_rcv_memcpy

On Fri, 3 Apr 2020 at 00:22, Jonathan Lemon <jonathan.lemon@...il.com> wrote:
>
> On 2 Apr 2020, at 0:52, Li RongQing wrote:
>
> > first_len is remainder of first page, if write size is
> > larger than it, out of page boundary write will happen
> >
> > Fixes: c05cd3645814 "(xsk: add support to allow unaligned chunk placement)"
> > Signed-off-by: Li RongQing <lirongqing@...du.com>
>
> Acked-by: Jonathan Lemon <jonathan.lemon@...il.com>

Good catch!
Acked-by: Björn Töpel <bjorn.topel@...el.com>