From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Mon, 12 May 2014 19:18:32 +0000 (-0700)
Subject: tcm_fc: Fix free-after-use regression in ft_free_cmd
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~172^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed8ec8f707ed4760c124d47b27c93df8ec5b1eba;p=pandora-kernel.git

tcm_fc: Fix free-after-use regression in ft_free_cmd

This patch fixes a free-after-use regression in ft_free_cmd(), where
ft_sess_put() is called with cmd->sess after percpu_ida_free() has
already released the tag.

Fix this bug by saving the ft_sess pointer ahead of percpu_ida_free(),
and pass it directly to ft_sess_put().

The regression was originally introduced in v3.13-rc1 commit:

  commit 5f544cfac956971099e906f94568bc3fd1a7108a
  Author: Nicholas Bellinger <nab@daterainc.com>
  Date:   Mon Sep 23 12:12:42 2013 -0700

      tcm_fc: Convert to per-cpu command map pre-allocation of ft_cmd

Reported-by: Jun Wu <jwu@stormojo.com>
Cc: Mark Rustad <mark.d.rustad@intel.com>
Cc: Robert Love <robert.w.love@intel.com>
Cc: <stable@vger.kernel.org> #3.13+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

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