From: Emil Tantilov <emil.s.tantilov@intel.com>
Date: Thu, 16 Oct 2014 15:49:02 +0000 (+0000)
Subject: ixgbe: check for vfs outside of sriov_num_vfs before dereference
X-Git-Tag: fixes-against-v3.18-rc2~61^2~21^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=600a507ddcb99096731e1d96a3ebf43e20fc7f80;p=pandora-kernel.git

ixgbe: check for vfs outside of sriov_num_vfs before dereference

The check for vfinfo is not sufficient because it does not protect
against specifying vf that is outside of sriov_num_vfs range.
All of the ndo functions have a check for it except for
ixgbevf_ndo_set_spoofcheck().

The following patch is all we need to protect against this panic:

ip link set p96p1 vf 0 spoofchk off
BUG: unable to handle kernel NULL pointer dereference at 0000000000000052
IP: [<ffffffffa044a1c1>]
ixgbe_ndo_set_vf_spoofchk+0x51/0x150 [ixgbe]

Reported-by: Thierry Herbelot <thierry.herbelot@6wind.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Acked-by: Thierry Herbelot <thierry.herbelot@6wind.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

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