From: Oleg Drokin <green@linuxhacker.ru>
Date: Fri, 24 Jan 2014 04:45:05 +0000 (-0500)
Subject: staging/lustre/lnet: Fix use after free in ksocknal_send
X-Git-Tag: v3.14-rc3~12^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aadbacc7f2f0f359bd562cb95adde3da348fb643;p=pandora-kernel.git

staging/lustre/lnet: Fix use after free in ksocknal_send

Call to ksocknal_launch_packet might schedule a callback that
might free the just sent message, and so subsequent access to it
via lntmsg->msg_vmflush goes to freed memory.

Instead we'll just remember if we are in the vmflush thread and
only restore if we happened to set mempressure flag.

Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: http://review.whamcloud.com/8667
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4360
Reviewed-by: Liang Zhen <liang.zhen@intel.com>
Reviewed-by: Amir Shehata <amir.shehata@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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