From ee299b578087b242c1ed9acf1deb8d59d96519d2 Mon Sep 17 00:00:00 2001
From: Masamichi Takagi <masamichi.takagi@riken.jp>
Date: Sun, 2 Sep 2018 17:08:37 +0900
Subject: [PATCH] uti: Check size of syscall arguments for syscall_intercept

Change-Id: I747b90e1f521b08266cfc021ef4b23e2e3c7ba4c
---
 executer/user/mcexec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/executer/user/mcexec.c b/executer/user/mcexec.c
index f1870054..dc114e8f 100644
--- a/executer/user/mcexec.c
+++ b/executer/user/mcexec.c
@@ -3020,6 +3020,11 @@ create_tracer(unsigned long user_start, unsigned long user_end)
 	open("/dev/null", O_WRONLY);
 #endif
 
+	/* Initialize list of syscall arguments for syscall_intercept */
+	if (sizeof(struct syscall_struct) * 11 > PAGE_SIZE) {
+		fprintf(stderr, "%s: ERROR: param is too large\n", __FUNCTION__);
+		exit(1);
+	}
 	for (i = 1; i <= 10; i++) {
 		param = (struct syscall_struct *)uti_desc->wp + i;
 		*(void **)param = param_top;