From 85c936a6cbdf6e728ef32a1c5fd576411ceca49f Mon Sep 17 00:00:00 2001
From: Balazs Gerofi <bgerofi@riken.jp>
Date: Thu, 8 Nov 2018 17:01:22 +0900
Subject: [PATCH] mcexec: fix terminating zero after readlink()

Change-Id: Icb5432f157ceb2182d93e2d327cfa63ad02a8c0e
---
 executer/user/mcexec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/executer/user/mcexec.c b/executer/user/mcexec.c
index 49765ff3..14f872aa 100644
--- a/executer/user/mcexec.c
+++ b/executer/user/mcexec.c
@@ -2827,17 +2827,20 @@ do_generic_syscall(
 		char proc_path[PATH_MAX];
 		char path[PATH_MAX];
 		struct stat sb;
+		int len;
 
 		sprintf(proc_path, "/proc/self/fd/%d", (int)w->sr.args[0]);
 
 		/* Get filename */
-		if (readlink(proc_path, path, sizeof(path)) < 0) {
+		if ((len = readlink(proc_path, path, sizeof(path))) < 0) {
 			fprintf(stderr, "%s: error: readlink() failed for %s\n",
 				__FUNCTION__, proc_path);
 			perror(": ");
 			goto out;
 		}
 
+		path[len] = 0;
+
 		/* Not in /sys? */
 		if (strncmp(path, "/sys/", 5))
 			goto out;