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Groups > linux.kernel > #1240451

Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X

From "Michael S. Tsirkin" <mst@redhat.com>
Newsgroups linux.kernel
Subject Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X
Date 2015-10-06 16:00 +0200
Message-ID <qgAWD-7WB-23@gated-at.bofh.it> (permalink)
References (2 earlier) <qeHzc-76i-15@gated-at.bofh.it> <qglXB-37e-29@gated-at.bofh.it> <qgmJY-4k3-21@gated-at.bofh.it> <qgmJY-4k3-19@gated-at.bofh.it> <qgvNg-Gu-13@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Oct 06, 2015 at 11:23:11AM +0300, Vlad Zolotarov wrote:
> Michael, how this or any other related patch is related to the problem u r
> describing?
> The above ability is there for years and if memory serves me
> well it was u who wrote uio_pci_generic with this "security flaw".  ;)

I answered all this already.

This patch enables bus mastering, enables MSI or MSI-X, and requires
userspace to map the MSI-X table and read/write the config space.
This means that a single userspace bug is enough to corrupt kernel
memory.

uio_pci_generic does not enable bus mastering or MSI, and
it might be a good idea to have uio_pci_generic block
access to MSI/MSI-X config.
-- 
MST
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Thread

[PATCH 0/2] uio_msi: device driver Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 00:30 +0200
  [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 00:30 +0200
    Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 10:40 +0200
      Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 12:40 +0200
        Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 18:10 +0200
      Re: [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 17:00 +0200
        Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 17:30 +0200
      Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 18:40 +0200
        Re: [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 19:30 +0200
          Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 20:30 +0200
      Re: [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 00:00 +0200
        Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 00:50 +0200
          Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-06 09:40 +0200
            Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Avi Kivity <avi@scylladb.com> - 2015-10-06 14:20 +0200
              Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 16:10 +0200
                Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Avi Kivity <avi@scylladb.com> - 2015-10-06 17:50 +0200
              Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Thomas Monjalon <thomas.monjalon@6wind.com> - 2015-10-16 19:20 +0200
                Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-16 19:30 +0200
            Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 15:50 +0200
          Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Vlad Zolotarov <vladz@cloudius-systems.com> - 2015-10-06 10:30 +0200
            Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 16:00 +0200
              Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Vlad Zolotarov <vladz@cloudius-systems.com> - 2015-10-06 16:50 +0200
                Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-06 17:10 +0200
                Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Vlad Zolotarov <vladz@cloudius-systems.com> - 2015-10-06 18:50 +0200
    Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 01:50 +0200
      Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-02 02:10 +0200
        Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 04:40 +0200
      Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Stephen Hemminger <stephen@networkplumber.org> - 2015-10-02 02:10 +0200
        Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 03:30 +0200
  [PATCH 1/2] uio: add support for ioctls Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 00:30 +0200
  Re: [PATCH 0/2] uio_msi: device driver "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-01 10:40 +0200
  Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Avi Kivity <avi@scylladb.com> - 2015-10-01 13:00 +0200
    Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Stephen Hemminger <stephen@networkplumber.org> - 2015-10-01 17:00 +0200
      Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-01 21:50 +0200
        Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Stephen Hemminger <stephen@networkplumber.org> - 2015-10-02 00:10 +0200
          Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 01:10 +0200
            Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Stephen Hemminger <stephen@networkplumber.org> - 2015-10-02 01:40 +0200
              Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 01:50 +0200
                Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Stephen Hemminger <stephen@networkplumber.org> - 2015-10-02 02:10 +0200
                Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-02 03:40 +0200
                Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Vlad Zolotarov <vladz@cloudius-systems.com> - 2015-10-04 19:00 +0200
                Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Greg KH <gregkh@linux-foundation.org> - 2015-10-04 21:10 +0200
                Re: [dpdk-dev] [PATCH 0/2] uio_msi: device driver Vlad Zolotarov <vladz@cloudius-systems.com> - 2015-10-04 22:50 +0200

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