From: Francois-Xavier Le Bail <devel.fx.lebail@orange.fr>
Date: Fri, 8 Mar 2019 12:34:39 +0000 (+0100)
Subject: Babel: Avoid an unsigned integer underflow
X-Git-Tag: tcpdump-4.99-bp~911
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/0aca3bf945b722e55a5accc69920d27d088a1dcc

Babel: Avoid an unsigned integer underflow
---

diff --git a/print-babel.c b/print-babel.c
index fb70a7fc..70310d70 100644
--- a/print-babel.c
+++ b/print-babel.c
@@ -301,10 +301,11 @@ subtlvs_print(netdissect_options *ndo,
                 break;
             }
             sep = " ";
-            while(sublen--) {
+            while (sublen) {
                 ND_PRINT("%s%s", sep, tok2str(diversity_str, "%u", EXTRACT_U_1(cp)));
                 cp++;
                 sep = "-";
+                sublen--;
             }
             if(tlv_type != MESSAGE_UPDATE &&
                tlv_type != MESSAGE_UPDATE_SRC_SPECIFIC)