tree ca0b085b803128efea92ab98723adcefb35556fc
parent cf7b9a1e11993a064f445d332fecf22819b87a5e
author Nadia Derbey <Nadia.Derbey@bull.net> 1227137768 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1227149397 -0800

sysvipc: fix the ipc structures initialization

A problem was found while reviewing the code after Bugzilla bug
http://bugzilla.kernel.org/show_bug.cgi?id=11796.

In ipc_addid(), the newly allocated ipc structure is inserted into the
ipcs tree (i.e made visible to readers) without locking it.  This is not
correct since its initialization continues after it has been inserted in
the tree.

This patch moves the ipc structure lock initialization + locking before
the actual insertion.

Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Reported-by: Clement Calmels <cboulte@gmail.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@kernel.org>		[2.6.27.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>