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i40e: Fix potential out of bound array access

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This is a fix for the static code analysis issue where dcbcfg->numapps
could be greater than size of array (i.e dcbcfg->app[I40E_DCBX_MAX_APPS]).
The fix makes sure that the array is not accessed past the size of
of the array (i.e. I40E_DCBX_MAX_APPS).

Copyright updated to 2017.

Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sudheer Mogilappagari 2017-06-07 05:43:05 -04:00 committed by Jeff Kirsher
parent 15d23b4c36
commit 1e99854715
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/intel/i40e/i40e_dcb.c
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@ -1,7 +1,7 @@
/******************************************************************************* /*******************************************************************************
* *
* Intel Ethernet Controller XL710 Family Linux Driver * Intel Ethernet Controller XL710 Family Linux Driver
* Copyright(c) 2013 - 2014 Intel Corporation. * Copyright(c) 2013 - 2017 Intel Corporation.
* *
* This program is free software; you can redistribute it and/or modify it * This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License, * under the terms and conditions of the GNU General Public License,
@ -390,6 +390,8 @@ static void i40e_parse_cee_app_tlv(struct i40e_cee_feat_tlv *tlv,
if (!dcbcfg->numapps) if (!dcbcfg->numapps)
return; return;
if (dcbcfg->numapps > I40E_DCBX_MAX_APPS)
dcbcfg->numapps = I40E_DCBX_MAX_APPS;
for (i = 0; i < dcbcfg->numapps; i++) { for (i = 0; i < dcbcfg->numapps; i++) {
u8 up, selector; u8 up, selector;