linux-kernel - Re: slab allocators: Remove SLAB_DEBUG

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Message-ID: <Pine.LNX.4.64.0704222318010.2338@schroedinger.engr.sgi.com>
Date:	Sun, 22 Apr 2007 23:20:00 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	linux-kernel@...r.kernel.org
Subject: Re: slab allocators: Remove SLAB_DEBUG_INITIAL flag

On Sun, 22 Apr 2007, Andrew Morton wrote:

> This patch causes a use-uninitialised crash in the locks code.

Sigh. The only case in which the check is inverted in a constructor.

Invert the check.

Signed-off-by: Christoph Lameter <clameter@....com>

Index: linux-2.6.21-rc6/fs/locks.c
===================================================================
--- linux-2.6.21-rc6.orig/fs/locks.c	2007-04-22 23:17:29.000000000 -0700
+++ linux-2.6.21-rc6/fs/locks.c	2007-04-22 23:17:45.000000000 -0700
@@ -203,7 +203,7 @@ static void init_once(void *foo, struct 
 {
 	struct file_lock *lock = (struct file_lock *) foo;
 
-	if (flags & SLAB_CTOR_CONSTRUCTOR)
+	if (!(flags & SLAB_CTOR_CONSTRUCTOR))
 		return;
 
 	locks_init_lock(lock);
-
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