From: William Tu <u9012063@gmail.com>
To: "Björn Töpel" <bjorn.topel@gmail.com>
Cc: "Ilya Maximets" <i.maximets@samsung.com>,
Netdev <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
Xdp <xdp-newbies@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
"Björn Töpel" <bjorn.topel@intel.com>,
"Magnus Karlsson" <magnus.karlsson@intel.com>,
"Jonathan Lemon" <jonathan.lemon@gmail.com>,
"Jakub Kicinski" <jakub.kicinski@netronome.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>
Subject: Re: [PATCH bpf] xdp: fix possible cq entry leak
Date: Mon, 8 Jul 2019 14:25:20 -0700 [thread overview]
Message-ID: <CALDO+SYaR+txmTq_xhaw1cD4v7svtE7BD3mOsBx-X=MEVeZzzA@mail.gmail.com> (raw)
In-Reply-To: <CAJ+HfNi2EdLwtq9SfccZBymDMv_cW5+vxB-JLqxyvYS_TG3ScA@mail.gmail.com>
On Thu, Jul 4, 2019 at 11:49 PM Björn Töpel <bjorn.topel@gmail.com> wrote:
>
> On Thu, 4 Jul 2019 at 16:25, Ilya Maximets <i.maximets@samsung.com> wrote:
> >
> > Completion queue address reservation could not be undone.
> > In case of bad 'queue_id' or skb allocation failure, reserved entry
> > will be leaked reducing the total capacity of completion queue.
> >
> > Fix that by moving reservation to the point where failure is not
> > possible. Additionally, 'queue_id' checking moved out from the loop
> > since there is no point to check it there.
> >
>
> Good catch, Ilya! Thanks for the patch!
>
> Acked-by: Björn Töpel <bjorn.topel@intel.com>
>
Thanks
Tested-by: William Tu <u9012063@gmail.com>
next prev parent reply other threads:[~2019-07-08 21:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190704142509eucas1p268eb9ca87bcc0bffb60891f88f3f6642@eucas1p2.samsung.com>
2019-07-04 14:25 ` [PATCH bpf] xdp: fix possible cq entry leak Ilya Maximets
2019-07-05 6:42 ` Björn Töpel
2019-07-08 21:25 ` William Tu [this message]
2019-07-12 13:07 ` Daniel Borkmann
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