From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Jianfeng Tan <jianfeng.tan@intel.com>
Cc: dev@dpdk.org,
Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>,
benjamin.walker@intel.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] eal/linux: fix multi-process cannot work
Date: Tue, 04 Apr 2017 11:58:39 +0200 [thread overview]
Message-ID: <1692898.PdBQoVJhCZ@xps13> (raw)
In-Reply-To: <7c01afcd-20a7-f2a0-f230-04e5b04fb3c9@intel.com>
2017-03-29 16:19, Sergio Gonzalez Monroy:
> On 16/03/2017 16:28, Jianfeng Tan wrote:
> > When binding with vfio-pci, secondary process cannot be started with
> > an error message:
> >
> > cannot find TAILQ entry for PCI device.
> >
> > It's due to: struct rte_pci_addr is padded with 1 byte for alignment
> > by compiler. Then below comparison in commit 2f4adfad0a69
> > ("vfio: add multiprocess support") will fail if the last byte is not
> > initialized.
> >
> > memcmp(&vfio_res->pci_addr, &dev->addr, sizeof(dev->addr)
> >
> > And commit cdc242f260e7 ("eal/linux: support running as unprivileged user")
> > just triggers this bug by using a stack un-initialized variable.
> >
> > The fix is to use rte_eal_compare_pci_addr() for pci addr comparison.
> >
> > Fixes: 2f4adfad0a69 ("vfio: add multiprocess support")
> > Fixes: cdc242f260e7 ("eal/linux: support running as unprivileged user")
> > CC: stable@dpdk.org
> >
> > Reported-by: Rutkowski, Pawel <pawelx.rutkowski@intel.com>
> > Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
>
> Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
Applied, thanks
prev parent reply other threads:[~2017-04-04 9:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-16 16:28 [dpdk-stable] " Jianfeng Tan
2017-03-29 15:19 ` Sergio Gonzalez Monroy
2017-04-04 9:58 ` Thomas Monjalon [this message]
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