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From: yoursunny <sunnylandh@gmail.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: dev@dpdk.org, Yangchao Zhou <zhouyates@gmail.com>,
	stephen@networkplumber.org, sodey@rbbn.com
Subject: Re: [dpdk-dev] [v3] kni: fix possible kernel crash with va2pa
Date: Wed, 10 Jul 2019 16:40:40 -0400
Message-ID: <CANsAqf7eN0ntc65hrqK10v7xDVGK-yGaBRybmKgfo_EEy3ZE4g@mail.gmail.com> (raw)
In-Reply-To: <bcc99d52-b416-1e59-5d8a-9407dbda0545@intel.com>

Hi Ferruh

I've uploaded my test case to Bug 183.
You can determine whether it is a bug that should be covered by this
patch, or it should be handled separately.

Yours, Junxiao

On Wed, Jul 10, 2019 at 4:11 PM Ferruh Yigit <ferruh.yigit@intel.com> wrote:
>
> On 7/2/2019 9:07 PM, Junxiao Shi wrote:
> > I am battling a related problem as reported on
> > https://bugs.dpdk.org/show_bug.cgi?id=183 and this patch seems
> > relevant, so I applied this patch on 196a46fab6eeb3ce2039e3bcaca80f8ba43ffc8d
> >
> > However, this patch does not work for me:
> > with CONFIG_RTE_LIBRTE_MBUF_DEBUG enabled, kni_free_mbufs's invocation of
> > rte_pktmbuf_free throws "bad mbuf pool" error.
> >
> > While all mbufs and segments in kni->rx_q now have physical addresses,
> > the mbufs and segments placed back to kni->free_q still have (mis-)calculated
> > virtual address. The pa2va function is not working properly.
> >
> > Consequently, userspace side is passing wrong pointer to rte_pktmbuf_free,
> > so that application crashes with CONFIG_RTE_LIBRTE_MBUF_DEBUG enabled.
> >
>
> Hi Junxiao,
>
> I don't see any issue in the code, and as far as I tested not seeing any issue.
>
> Can you please provide more information how to reproduce the issue, is it only
> enabling "CONFIG_RTE_LIBRTE_MBUF_DEBUG" config?
>
> Thanks,
> ferruh

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28  7:30 [PATCH] " Yangchao Zhou
2019-03-06 17:31 ` Ferruh Yigit
2019-06-14 18:41   ` [dpdk-dev] " Dey, Souvik
2019-03-12  9:22 ` [PATCH v2] " Yangchao Zhou
2019-03-19 18:35   ` Ferruh Yigit
2019-03-22 20:49   ` Ferruh Yigit
2019-06-18  4:06     ` [dpdk-dev] " Dey, Souvik
2019-06-18 15:48   ` Stephen Hemminger
2019-06-25 15:04   ` [dpdk-dev] [PATCH v3] " Yangchao Zhou
2019-07-02 20:07     ` [dpdk-dev] [v3] " Junxiao Shi
2019-07-10 20:11       ` Ferruh Yigit
2019-07-10 20:40         ` yoursunny [this message]
2019-07-10 21:23           ` Ferruh Yigit
2019-07-10 23:52             ` yoursunny
2019-07-10 20:09     ` [dpdk-dev] [PATCH v3] " Ferruh Yigit
2019-07-11  7:46       ` Ferruh Yigit
2019-07-15 20:50         ` Thomas Monjalon

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