X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/406b0e3e9293a545c831ee9ed1558c3a5f5bd60d..f152c1268f28fc84d15d364b742f500e12374b33:/print-ip6.c

diff --git a/print-ip6.c b/print-ip6.c
index 2e1803f0..9f590f2a 100644
--- a/print-ip6.c
+++ b/print-ip6.c
@@ -293,15 +293,19 @@ ip6_print(netdissect_options *ndo, const u_char *bp, u_int length)
 		switch (nh) {
 		case IPPROTO_HOPOPTS:
 			advance = hbhopt_print(ndo, cp);
+			if (advance < 0)
+				return;
 			nh = *cp;
 			break;
 		case IPPROTO_DSTOPTS:
 			advance = dstopt_print(ndo, cp);
+			if (advance < 0)
+				return;
 			nh = *cp;
 			break;
 		case IPPROTO_FRAGMENT:
 			advance = frag6_print(ndo, cp, (const u_char *)ip6);
-			if (ndo->ndo_snapend <= cp + advance)
+			if (advance < 0 || ndo->ndo_snapend <= cp + advance)
 				return;
 			nh = *cp;
 			fragmented = 1;