From: Christoph Paasch <christoph.paasch@uclouvain.be>
Date: Fri, 21 Mar 2014 10:48:19 +0000 (-0700)
Subject: igb: Fix Null-pointer dereference in igb_reset_q_vector
X-Git-Tag: v3.15-rc1~113^2~97^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb06d102327eadcd1bdc480bfd9f8876251d1007;p=pandora-kernel.git

igb: Fix Null-pointer dereference in igb_reset_q_vector

When igb_set_interrupt_capability() calls
igb_reset_interrupt_capability() (e.g., because CONFIG_PCI_MSI is unset),
num_q_vectors has been set but no vector has yet been allocated.

igb_reset_interrupt_capability() will then call igb_reset_q_vector,
which assumes that the vector is allocated. As this is not the case, we
are accessing a NULL-pointer.

This patch fixes it by checking that q_vector is indeed different from
NULL.

Fixes: 02ef6e1d0b0023 (igb: Fix queue allocation method to accommodate changing during runtime)
Cc: Carolyn Wyborny <carolyn.wyborny@intel.com>
Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

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