From 8a06ed929981838ae1559b48d822758c3a52b2d3 Mon Sep 17 00:00:00 2001
From: Martin Fleisz <martin.fleisz@thincast.com>
Date: Mon, 16 May 2022 11:13:22 +0000
Subject: [PATCH] proxy: Reset stream position before length check

---
 server/proxy/channels/pf_channel_smartcard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/proxy/channels/pf_channel_smartcard.c b/server/proxy/channels/pf_channel_smartcard.c
index e0b758850..cc2ba33f7 100644
--- a/server/proxy/channels/pf_channel_smartcard.c
+++ b/server/proxy/channels/pf_channel_smartcard.c
@@ -81,9 +81,9 @@ static BOOL pf_channel_client_write_iostatus(wStream* out, const SMARTCARD_OPERA
 	WINPR_ASSERT(out);
 
 	pos = Stream_GetPosition(out);
+	Stream_SetPosition(out, 0);
 	if (!Stream_CheckAndLogRequiredLength(TAG, out, 16))
 		return FALSE;
-	Stream_SetPosition(out, 0);
 
 	Stream_Read_UINT16(out, component);
 	Stream_Read_UINT16(out, packetid);