linux-kernel - [PATCH v1 net 0/2] fix shared vcap

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Date:   Fri, 29 Apr 2022 16:30:47 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH v1 net 0/2] fix shared vcap_props reference

Felix vcap_props get statically allocated at the file scope, while the
felix / ocelot instances get dynamically allocated at initialization. If
there's more than one instance, each instance will be writing over the
same vcap_props memory region, which would lead to corruption.

I don't have any hardware to confidently test the vcap portions of
Ocelot / Felix, so any testers would be appreciated.

Also, I believe the memcpy of a structure array should be
architecture-portable, but I'm not 100% confident there, so that might
be an area of extra scrutiny.


Colin Foster (2):
  net: ethernet: ocelot: rename vcap_props to clearly be an ocelot
    member
  net: mscc: ocelot: fix possible memory conflict for vcap_props

 drivers/net/dsa/ocelot/felix.c             |  3 +-
 drivers/net/dsa/ocelot/felix.h             |  2 +-
 drivers/net/dsa/ocelot/felix_vsc9959.c     |  2 +-
 drivers/net/dsa/ocelot/seville_vsc9953.c   |  2 +-
 drivers/net/ethernet/mscc/ocelot_flower.c  |  4 +-
 drivers/net/ethernet/mscc/ocelot_vcap.c    | 54 +++++++++++-----------
 drivers/net/ethernet/mscc/ocelot_vsc7514.c |  5 +-
 include/soc/mscc/ocelot.h                  | 34 +++++++++++++-
 include/soc/mscc/ocelot_vcap.h             | 32 -------------
 9 files changed, 71 insertions(+), 67 deletions(-)

-- 
2.25.1