From 2c7d1fe39f76d46c6d980b287453063ec10097d6 Mon Sep 17 00:00:00 2001
From: Jef Driesen <jefdriesen@users.sourceforge.net>
Date: Sat, 24 Mar 2018 13:13:09 +0100
Subject: [PATCH] Use 64bit arithmetic to avoid overflow

The multiplication is evaluated using 32bit arithmetic, and then stored
in a 64bit integer. The 32bit integer overflow can be avoided by casting
to a 64bit type first.
---
 src/serial_posix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/serial_posix.c b/src/serial_posix.c
index 352655b..6f2ae71 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -691,7 +691,7 @@ dc_serial_read (dc_iostream_t *abstract, void *data, size_t size, size_t *actual
 
 			if (init) {
 				// Calculate the initial timeout.
-				timeout = device->timeout * 1000;
+				timeout = (dc_usecs_t) device->timeout * 1000;
 				// Calculate the target time.
 				target = now + timeout;
 				init = 0;