From: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Date: Tue, 8 May 2007 08:18:58 +0000 (+0100)
Subject: [DLM] fix a couple of races
X-Git-Tag: v2.6.23-rc1~1156^2~55
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3168b0780d06ace875696f8a648d04d6089654e5;p=pandora-kernel.git

[DLM] fix a couple of races

Fix two races in fs/dlm/config.c:

(1) Grab the configfs subsystem semaphore before calling
config_group_find_obj() in get_space(). This solves a potential race
between get_space() and concurrent mkdir(2) or rmdir(2).

(2) Grab a reference on the found config_item _while_ holding the configfs
subsystem semaphore in get_comm(), and not after it. This solves a
potential race between get_comm() and concurrent rmdir(2).

Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---

Reading git-diff-tree failed