From d079aae0e08611d06dc727ac2b56b978b814f64a Mon Sep 17 00:00:00 2001
From: christiaans <christiaans>
Date: Fri, 22 Sep 2006 07:59:44 +0000
Subject: [PATCH] Fixed NULL dereferencing for zero length raw data.

---
 src/core/snmp/asn1_enc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/core/snmp/asn1_enc.c b/src/core/snmp/asn1_enc.c
index bd0a87b5..dc12f8a4 100644
--- a/src/core/snmp/asn1_enc.c
+++ b/src/core/snmp/asn1_enc.c
@@ -596,8 +596,11 @@ snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw)
           msg_ptr++;
         }
       }
-      /* copy last octet */
-      *msg_ptr = *raw;
+      if (raw_len > 0)
+      {
+        /* copy last or single octet */
+        *msg_ptr = *raw;
+      }
       return ERR_OK;
     }
     p = p->next;