From: Francois-Xavier Le Bail <devel.fx.lebail@orange.fr>
Date: Sun, 9 May 2021 17:48:01 +0000 (+0200)
Subject: ZEP: Add a bounds check
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/6f245276a2a24d673f2919e33476191781e20499

ZEP: Add a bounds check

This avoids to have cp (current pointer on packet data) > ndo->ndo_snapend
in hex_and_ascii_print(), via ndo_default_print(), via ND_DEFAULTPRINT(),
in some cases.
---

diff --git a/print-zep.c b/print-zep.c
index ac4e017c..e10ecb35 100644
--- a/print-zep.c
+++ b/print-zep.c
@@ -27,6 +27,7 @@
 
 #include "netdissect-stdinc.h"
 
+#define ND_LONGJMP_FROM_TCHECK
 #include "netdissect.h"
 
 #include "extract.h"
@@ -166,6 +167,7 @@ zep_print(netdissect_options *ndo,
 		/* Call 802.15.4 dissector. */
 		ND_PRINT("\n\t");
 		if (ieee802_15_4_print(ndo, bp, inner_len)) {
+			ND_TCHECK_LEN(bp, len);
 			bp += len;
 			len = 0;
 		}