From fba931bab67c4239f3b1404240d008a1dbbe5d1f Mon Sep 17 00:00:00 2001
From: Alexander Couzens <lynxis@fe80.eu>
Date: Wed, 10 Jul 2019 21:03:23 +0200
Subject: bts.cpp: ensure left-shift operation does not exceed uint32_t

Found by Asan
Relates: OS#4029
Change-Id: I21640e40e689016d6fb80a8db4257b22e85b303b
---
 src/bts.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/bts.cpp')

diff --git a/src/bts.cpp b/src/bts.cpp
index e07b840f..8799c3dd 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -551,7 +551,7 @@ int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn)
 	}
 
 	/* get TLLI from downlink assignment */
-	tlli = (*data++) << 28;
+	tlli = ((*data++) & 0xf) << 28;
 	tlli |= (*data++) << 20;
 	tlli |= (*data++) << 12;
 	tlli |= (*data++) << 4;
-- 
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