From: Guy Harris <guy@alum.mit.edu>
Date: Tue, 18 Aug 2009 21:47:13 +0000 (-0700)
Subject: Check that bytes exist in the captured data before fetching them.
X-Git-Tag: tcpdump-4.1.0~75
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/9da2a96bb5e968223e19bf0a6342d1b9ada1efbc

Check that bytes exist in the captured data before fetching them.
---

diff --git a/print-sip.c b/print-sip.c
index 48562f8c..c5bc8534 100644
--- a/print-sip.c
+++ b/print-sip.c
@@ -44,6 +44,7 @@ sip_print(register const u_char *pptr, register u_int len)
         return;
 
     for (idx = 0; idx < len; idx++) {
+        TCHECK2(*(pptr+idx), 2);
         if (EXTRACT_16BITS(pptr+idx) != 0x0d0a) { /* linefeed ? */
             safeputchar(*(pptr+idx));
         } else {
@@ -57,4 +58,7 @@ sip_print(register const u_char *pptr, register u_int len)
         print_unknown_data(pptr,"\n\t",len);
 
     return;
+
+trunc:
+    printf("[|sip]");
 }