linux-kernel - [patch] x86, bts: fix unlock problem in ds.c

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Message-Id: <1226743217.6162.4.camel@raistlin>
Date:	Sat, 15 Nov 2008 11:00:17 +0100
From:	Markus Metzger <markus.t.metzger@...glemail.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	work <markus.t.metzger@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	stephane eranian <eranian@...glemail.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>
Subject: [patch] x86, bts: fix unlock problem in ds.c

Fix a problem where ds_request() returned an error without releasing the
ds lock.

Reported-by: Stephane Eranian <eranian@...il.com>
Signed-off-by: Markus Metzger <markus.t.metzger@...il.com>
---

Index: gits/arch/x86/kernel/ds.c
===================================================================
--- gits.orig/arch/x86/kernel/ds.c	2008-11-15 10:51:51.000000000 +0100
+++ gits/arch/x86/kernel/ds.c	2008-11-15 10:53:43.000000000 +0100
@@ -384,8 +384,9 @@
 
 	spin_lock(&ds_lock);
 
+	error = -EPERM;
 	if (!check_tracer(task))
-		return -EPERM;
+		goto out_unlock;
 
 	error = -ENOMEM;
 	context = ds_alloc_context(task);


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