From db51569ef340e1b87df200aca836216ee757fb17 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@digeo.com>
Date: Sat, 22 Mar 2003 07:35:58 -0800
Subject: [PATCH] ptrace_notify() locking

Spotted by Dawson Engler.

recalc_signpending() needs tsk->sighand->siglock.
---
 kernel/ptrace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 287b81b65c34..bed9bd42525b 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -336,5 +336,8 @@ void ptrace_notify(int exit_code)
 	/*
 	 * Signals sent while we were stopped might set TIF_SIGPENDING.
 	 */
+
+	spin_lock_irq(&current->sighand->siglock);
 	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
 }
-- 
cgit v1.2.3