From: Ingo Molnar <mingo@elte.hu>

It's not safe to dump another task's held-locks array - restrict this to
the current task only.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/lockdep.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN kernel/lockdep.c~lockdep-show-held-locks-when-showing-a-stackdump-fix-2 kernel/lockdep.c
--- a/kernel/lockdep.c~lockdep-show-held-locks-when-showing-a-stackdump-fix-2
+++ a/kernel/lockdep.c
@@ -2758,7 +2758,8 @@ EXPORT_SYMBOL_GPL(debug_show_all_locks);
 
 void debug_show_held_locks(struct task_struct *task)
 {
-	lockdep_print_held_locks(task);
+	if (task == current)
+		lockdep_print_held_locks(task);
 }
 
 EXPORT_SYMBOL_GPL(debug_show_held_locks);
_