diff --git a/executer/include/uprotocol.h b/executer/include/uprotocol.h
index c8f43877..9eef1604 100644
--- a/executer/include/uprotocol.h
+++ b/executer/include/uprotocol.h
@@ -38,7 +38,6 @@
 #define MCEXEC_UP_SEND_SIGNAL    0x30a02906
 #define MCEXEC_UP_GET_CPU        0x30a02907
 #define MCEXEC_UP_STRNCPY_FROM_USER 0x30a02908
-#define MCEXEC_UP_NEW_PROCESS	 0x30a02909
 #define MCEXEC_UP_GET_CRED	 0x30a0290a
 #define MCEXEC_UP_GET_CREDV	 0x30a0290b
 #define MCEXEC_UP_GET_NODES  0x30a0290c
@@ -230,10 +229,6 @@ struct signal_desc {
 	char info[128];
 };
 
-struct newprocess_desc {
-	int pid;
-};
-
 struct sys_mount_desc {
 	char *dev_name;
 	char *dir_name;
diff --git a/executer/kernel/mcctrl/control.c b/executer/kernel/mcctrl/control.c
index e0175d3d..392970b0 100644
--- a/executer/kernel/mcctrl/control.c
+++ b/executer/kernel/mcctrl/control.c
@@ -389,21 +389,15 @@ static void release_handler(ihk_os_t os, void *param)
 			__FUNCTION__, info);
 }
 
-static long mcexec_newprocess(ihk_os_t os,
-                              struct newprocess_desc *__user udesc,
-                              struct file *file)
+static long mcexec_newprocess(ihk_os_t os, struct file *file)
 {
-	struct newprocess_desc desc;
 	struct mcos_handler_info *info;
 
-	if (copy_from_user(&desc, udesc, sizeof(struct newprocess_desc))) { 
-		return -EFAULT;
-	}
 	info = new_mcos_handler_info(os, file);
 	if (info == NULL) {
 		return -ENOMEM;
 	}
-	info->pid = desc.pid;
+	info->pid = task_tgid_vnr(current);
 	ihk_os_register_release_handler(file, release_handler, info);
 	ihk_os_set_mcos_private_data(file, info);
 	return 0;
@@ -1720,12 +1714,14 @@ mcexec_getcredv(int __user *virt)
 }
 
 int mcexec_create_per_process_data(ihk_os_t os,
-				   struct rpgtable_desc * __user rpt)
+				   struct rpgtable_desc * __user rpt,
+				   struct file *file)
 {
 	struct mcctrl_usrdata *usrdata = ihk_host_os_get_usrdata(os);
 	struct mcctrl_per_proc_data *ppd = NULL;
 	int i;
 	struct rpgtable_desc krpt;
+	long ret;
 
 	if (rpt &&
 	    copy_from_user(&krpt, rpt, sizeof(krpt))) {
@@ -1745,6 +1741,10 @@ int mcexec_create_per_process_data(ihk_os_t os,
 		printk("%s: ERROR: allocating per-process data\n", __FUNCTION__);
 		return -ENOMEM;
 	}
+	if ((ret = mcexec_newprocess(os, file))) {
+		kfree(ppd);
+		return ret;
+	}
 	memset(ppd, 0, sizeof(struct mcctrl_per_proc_data)); /* debug */
 
 	ppd->ud = usrdata;
@@ -3159,7 +3159,7 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
 
 	case MCEXEC_UP_CREATE_PPD:
 		return mcexec_create_per_process_data(os,
-					    (struct rpgtable_desc * __user)arg);
+				      (struct rpgtable_desc * __user)arg, file);
 
 	case MCEXEC_UP_GET_NODES:
 		return mcexec_get_nodes(os);
@@ -3171,10 +3171,6 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
 		return mcexec_strncpy_from_user(os, 
 				(struct strncpy_from_user_desc *)arg);
 
-	case MCEXEC_UP_NEW_PROCESS:
-		return mcexec_newprocess(os, (struct newprocess_desc *)arg,
-		                         file);
-
 	case MCEXEC_UP_OPEN_EXEC:
 		return mcexec_open_exec(os, (char *)arg);
 
diff --git a/executer/kernel/mcctrl/driver.c b/executer/kernel/mcctrl/driver.c
index 7ce341aa..b5fd4b51 100644
--- a/executer/kernel/mcctrl/driver.c
+++ b/executer/kernel/mcctrl/driver.c
@@ -74,7 +74,6 @@ static struct ihk_os_user_call_handler mcctrl_uchs[] = {
 	{ .request = MCEXEC_UP_GET_CPUSET, .func = mcctrl_ioctl },
 	{ .request = MCEXEC_UP_CREATE_PPD, .func = mcctrl_ioctl },
 	{ .request = MCEXEC_UP_STRNCPY_FROM_USER, .func = mcctrl_ioctl },
-	{ .request = MCEXEC_UP_NEW_PROCESS, .func = mcctrl_ioctl },
 	{ .request = MCEXEC_UP_PREPARE_DMA, .func = mcctrl_ioctl },
 	{ .request = MCEXEC_UP_FREE_DMA, .func = mcctrl_ioctl },
 	{ .request = MCEXEC_UP_OPEN_EXEC, .func = mcctrl_ioctl },
diff --git a/executer/user/mcexec.c b/executer/user/mcexec.c
index 9aa252a2..35493214 100644
--- a/executer/user/mcexec.c
+++ b/executer/user/mcexec.c
@@ -3807,7 +3807,6 @@ gettid_out:
 			    /* Child process */
 			    case 0: {
 				int ret = 1;
-				struct newprocess_desc npdesc;
 				struct rpgtable_desc rpt;
 
 				ischild = 1;
@@ -3879,9 +3878,6 @@ fork_child_sync_pipe:
 				fork_sync_top = NULL;
 				pthread_mutex_init(&fork_sync_mutex, NULL);
 
-				npdesc.pid = getpid();
-				ioctl(fd, MCEXEC_UP_NEW_PROCESS, &npdesc);
-
 				/* TODO: does the forked thread run in a pthread context? */
 				while (getppid() != 1 &&
 				       fs->success == 0) {
diff --git a/test/common.sh b/test/common.sh
index 31a4c5d4..50726239 100644
--- a/test/common.sh
+++ b/test/common.sh
@@ -75,6 +75,20 @@ if ((USEOSTEST)); then
 	TESTMCK="$OSTEST/bin/test_mck"
 fi
 
+if ((USESTRESSTEST)); then
+	if [[ -z "$STRESS_TEST" ]]; then
+		if [[ -f "$HOME/stress_test/bin/signalonfork" ]]; then
+			STRESS_TEST="$HOME/stress_test"
+		fi
+	fi
+
+	if [[ ! -x "$STRESS_TEST/bin/signalonfork" ]]; then
+		echo no STRESS_TEST found $STRESS_TEST >&2
+		exit 1
+	fi
+	STRESSTESTBIN="$STRESS_TEST/bin"
+fi
+
 # compat variables
 BINDIR="$BIN"
 SBINDIR="$SBIN"
diff --git a/test/issues/1201/C1201.sh b/test/issues/1201/C1201.sh
new file mode 100644
index 00000000..1f2bffba
--- /dev/null
+++ b/test/issues/1201/C1201.sh
@@ -0,0 +1,61 @@
+#!/bin/sh
+USELTP=1
+USEOSTEST=0
+USESTRESSTEST=1
+MCREBOOT=0
+MCSTOP=0
+
+. ../../common.sh
+
+################################################################################
+ng=0
+org="`pwd`"
+(
+	cd "$STRESSTESTBIN"
+	rm -f config.sh.bak
+	if [ -f config.sh ]; then
+		mv config.sh config.sh.bak
+		sed -e '/^MCKDIR=/d' config.sh.bak > config.sh
+	fi
+	echo "MCKDIR=\"$MCK_DIR\"" >> config.sh
+	if ! grep ^MCREBOOTOPTION= config.sh > /dev/null 2>&1; then
+		echo "MCREBOOTOPTION=\"$BOOTPARAM\"" >> config.sh
+	fi
+	rm -f "$org/C1201T01.log"
+	echo C1201T01 START
+	for i in {1..100}; do
+		sudo ./mck-stop.sh >> "$org/C1201T01.log" 2>&1
+		sudo ./mck-boot.sh >> "$org/C1201T01.log" 2>&1
+		./mck-mcexec.sh ./killit -np 8 -t 2000 - ./signalonfork \
+				-nosignal >> "$org/C1201T01.log" 2>&1
+		if [ "X$?" = X0 ]; then
+			echo -n .
+		else
+			echo
+			echo C1201T01: NG see C1201T01.log
+			ng=1
+			break
+		fi
+	done
+	if [ $ng = 0 ]; then
+		echo
+		echo C1201T01: OK
+	fi
+	if [ -f config.sh.bak ]; then
+		mv config.sh.bak config.sh
+	fi
+)
+
+for i in fork01:02 fork02:03 fork03:04 fork04:05 fork07:06 fork08:07 fork09:08 \
+	 fork10:09 fork11:10; do
+	tp=`echo $i|sed 's/:.*//'`
+	id=`echo $i|sed 's/.*://'`
+	sudo $MCEXEC $LTPBIN/$tp 2>&1 | tee $tp.txt
+	ok=`grep TPASS $tp.txt | wc -l`
+	ng=`grep TFAIL $tp.txt | wc -l`
+	if [ $ng = 0 ]; then
+		echo "*** C1201T$id: $tp OK ($ok)"
+	else
+		echo "*** C1201T$id: $tp NG (ok=$ok ng=%ng)"
+	fi
+done
diff --git a/test/issues/1201/C1201.txt b/test/issues/1201/C1201.txt
new file mode 100644
index 00000000..9f782867
--- /dev/null
+++ b/test/issues/1201/C1201.txt
@@ -0,0 +1,53 @@
+Script started on Tue Jan 22 12:16:17 2019
+bash-4.2$ make test
+sh ./C1201.sh
+C1201T01 START
+....................................................................................................
+C1201T01: OK
+fork01      1  TPASS  :  fork() returned 22030
+fork01      2  TPASS  :  child pid and fork() return agree: 22030
+*** C1201T02: fork01 OK (2)
+fork02      0  TINFO  :  Inside parent
+fork02      0  TINFO  :  Inside child
+fork02      0  TINFO  :  exit status of wait 0
+fork02      1  TPASS  :  test 1 PASSED
+*** C1201T03: fork02 OK (1)
+fork03      0  TINFO  :  process id in parent of child from fork : 22181
+fork03      1  TPASS  :  test 1 PASSED
+*** C1201T04: fork03 OK (1)
+fork04      1  TPASS  :  Env var TERM unchanged after fork(): xterm
+fork04      2  TPASS  :  Env var NoTSetzWq unchanged after fork(): getenv() does not find variable set
+fork04      3  TPASS  :  Env var TESTPROG unchanged after fork(): FRKTCS04
+*** C1201T05: fork04 OK (3)
+fork07      0  TINFO  :  Forking 100 children
+fork07      0  TINFO  :  Forked all 100 children, now collecting
+fork07      0  TINFO  :  Collected all 100 children
+fork07      1  TPASS  :  100/100 children read correctly from an inheritted fd
+*** C1201T06: fork07 OK (1)
+fork08      0  TINFO  :  parent forksval: 1
+fork08      0  TINFO  :  parent forksval: 2
+fork08      0  TINFO  :  exit status of wait  expected 0 got 0
+fork08      1  TPASS  :  parent test PASSED
+fork08      0  TINFO  :  second child got char: b
+fork08      1  TPASS  :  Test passed in childnumber 2
+fork08      0  TINFO  :  exit status of wait  expected 0 got 0
+fork08      2  TPASS  :  parent test PASSED
+fork08      0  TINFO  :  exit status of wait  expected 0 got 0
+fork08      3  TPASS  :  parent test PASSED
+fork08      0  TINFO  :  Number of processes forked is 2
+*** C1201T07: fork08 OK (4)
+fork09      0  TINFO  :  OPEN_MAX is 1024
+fork09      0  TINFO  :  first file descriptor is 12
+fork09      0  TINFO  :  Parent reporting 1023 files open
+fork09      0  TINFO  :  Child opened new file #1023
+fork09      1  TPASS  :  test 1 PASSED
+*** C1201T08: fork09 OK (1)
+fork10      0  TINFO  :  fork child A
+fork10      1  TPASS  :  test 1 PASSED
+*** C1201T09: fork10 OK (1)
+fork11      1  TPASS  :  fork test passed, 100 processes
+*** C1201T10: fork11 OK (1)
+bash-4.2$ exit
+exit
+
+Script done on Tue Jan 22 12:52:39 2019
diff --git a/test/issues/1201/Makefile b/test/issues/1201/Makefile
new file mode 100644
index 00000000..7a8199c7
--- /dev/null
+++ b/test/issues/1201/Makefile
@@ -0,0 +1,9 @@
+TARGET=
+
+all:: $(TARGET)
+
+test:: $(TARGET)
+	sh ./C1201.sh
+
+clean::
+	rm -f *.o $(TARGET)
diff --git a/test/issues/1201/README b/test/issues/1201/README
new file mode 100644
index 00000000..fb7cf9a9
--- /dev/null
+++ b/test/issues/1201/README
@@ -0,0 +1,34 @@
+【Issue#1201 動作確認】
+□ テスト内容
+テスト内容は以下の通りである。
+1. Issue 指摘事項の再現確認
+C1201T01 stress-6-1-signalonfork-001 を 100 回連続で正常終了することを確認。
+         対策前は 20 回程度の連続実行で確実に再現するため、100 回の連続実行
+         で発生しなければ対策されたと判断する。
+
+2. LTP を用いて既存処理に影響しないことを確認
+   プロセス生成処理関連を変更したため、fork のテストを選定した。
+C1201T02 fork01 が PASS すること
+C1201T03 fork02 が PASS すること
+C1201T04 fork03 が PASS すること
+C1201T05 fork04 が PASS すること
+C1201T06 fork07 が PASS すること
+C1201T07 fork08 が PASS すること
+C1201T08 fork09 が PASS すること
+C1201T09 fork10 が PASS すること
+C1201T10 fork11 が PASS すること
+
+□ 実行手順
+$ make test
+
+McKernelのインストール先や LTP の配置場所は、$HOME/.mck_test_config を
+参照する。.mck_test_config は、McKernel を ビルドした際に生成される
+mck_test_config.sample ファイルを $HOME に コピーし、適宜編集すること。
+
+また、C1201.sh の以下の指定を適宜変更すること。
+STRESSTESTDIR=  ストレステストが存在するパス。
+		($HOME/stress_test の場合は変更不要)
+
+□ 実行結果
+C1201.txt 参照。
+すべての項目をPASSしていることを確認。
diff --git a/test/mck_test_config.sample.in b/test/mck_test_config.sample.in
index 073ff7a0..ccb991ea 100644
--- a/test/mck_test_config.sample.in
+++ b/test/mck_test_config.sample.in
@@ -4,5 +4,6 @@
 : ${SBIN:=@prefix@/sbin}
 : ${OSTEST:=}
 : ${LTP:=}
+: ${STRESS_TEST:=}
 : ${BOOTPARAM:=-c 1-7,9-15,17-23,25-31 -m 10G@0,10G@1 -r 1-7:0+9-15:8+17-23:16+25-31:24}
 : ${MCKERNEL_VERSION:=@MCKERNEL_VERSION@}