From f2ab0193e55a96bf54a2881a93ac92d636757a62 Mon Sep 17 00:00:00 2001
From: Tomoki Shirasawa <sira@popeye.cc.u-tokyo.ac.jp>
Date: Tue, 28 Mar 2017 11:31:27 +0900
Subject: [PATCH] fix to panic when thread end and signal overlap.

---
 arch/x86/kernel/syscall.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/syscall.c b/arch/x86/kernel/syscall.c
index 20be9430..7f2059c7 100644
--- a/arch/x86/kernel/syscall.c
+++ b/arch/x86/kernel/syscall.c
@@ -1179,7 +1179,8 @@ done:
 			if(pid != -1 && tthread->proc->pid != pid){
 				continue;
 			}
-			if(tthread->tid == tid){
+			if (tthread->tid == tid &&
+			    tthread->status != PS_EXITED) {
 				found = 1;
 				break;
 			}