From ef1b8e36a043509bb7fcdcc4f356f2e04d6e6117 Mon Sep 17 00:00:00 2001
From: Stuart Reilly <rs576h@vyatta.att-mail.com>
Date: Fri, 28 Jun 2019 16:12:42 +0100
Subject: Fix potential NULL dref in btlib.c

---
 src/lib/protocols/btlib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib/protocols/btlib.c b/src/lib/protocols/btlib.c
index 309a10717..71b4dff9a 100644
--- a/src/lib/protocols/btlib.c
+++ b/src/lib/protocols/btlib.c
@@ -423,7 +423,7 @@ const u_int8_t *bt_decode(const u_int8_t *b, size_t *l, int *ret, bt_parse_data_
   int64_t d = 0;
   u_int8_t c;
 
-  if(*l == 0) return NULL;
+  if(!l || *l == 0) return NULL;
   if(cbd->level > BDEC_MAXDEPT) goto bad_data;
   c = *b++; (*l)--;
   if(c == 'i') { // integer
-- 
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