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@gmail.com> Signed-off-by: Markus Metzger <markus.t.metzger@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
mariux64 · Nov 16, 2008 · d1f1e9c · d1f1e9c
1 parent 6cd10f8
commit d1f1e9c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
@@ -384,8 +384,9 @@ static int ds_request(struct task_struct *task, void *base, size_t size,
 
 	spin_lock(&ds_lock);
 
+	error = -EPERM;
 	if (!check_tracer(task))
-		return -EPERM;
+		goto out_unlock;
 
 	error = -ENOMEM;
 	context = ds_alloc_context(task);