From e92e0dca144b813b43c7e832dd10c83a381c4bcb Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 8 Jan 2017 23:00:41 +0100
Subject: [PATCH] wg: error on short ret reads

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 src/ipc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ipc.c b/src/ipc.c
index c8ca431..6237961 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -179,6 +179,10 @@ static int userspace_set_device(struct wgdevice *dev)
 	ret = read(fd, &ret_code, sizeof(ret_code));
 	if (ret < 0)
 		goto out;
+	if (ret != sizeof(ret_code)) {
+		ret = -EBADMSG;
+		goto out;
+	}
 	ret = ret_code;
 out:
 	close(fd);