From 555c32015c59929dce4b46b38a383c6d4760174d Mon Sep 17 00:00:00 2001
From: Romuald Conty <romuald@libnfc.org>
Date: Mon, 14 Feb 2011 13:23:39 +0000
Subject: [PATCH] uart: prevent from retrieving more than buffer length
 (potential buffer overflow)

---
 libnfc/buses/uart_posix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libnfc/buses/uart_posix.c b/libnfc/buses/uart_posix.c
index f21e948..8e664c9 100644
--- a/libnfc/buses/uart_posix.c
+++ b/libnfc/buses/uart_posix.c
@@ -252,7 +252,7 @@ uart_receive (serial_port sp, byte_t * pbtRx, size_t * pszRx)
       return DEIO;
     }
     // There is something available, read the data
-    res = read (((serial_port_unix *) sp)->fd, pbtRx + (*pszRx), byteCount);
+    res = read (((serial_port_unix *) sp)->fd, pbtRx + (*pszRx), MIN(byteCount, iExpectedByteCount));
     iExpectedByteCount -= byteCount;
 
     // Stop if the OS has some troubles reading the data