commit 81e74d8e22365166043de40666f324df0533ccef
author Benoît Ganne <bganne@cisco.com> Thu Feb 24 16:17:52 2022 +0100
committer Neale Ranns <neale@graphiant.com> Fri Mar 04 15:57:12 2022 +0000
tree bcf4a58cd835af9254439cef74d86b392eb5ff89
parent 82b7991fc28191fd27611c9c948e4aa29f4ca05a

ip: fix overflow in ip6_ext_header_walk

ip6_ext_hdr_chain_t->eh is IP6_EXT_HDR_MAX elements.

Type: fix

Change-Id: I28b8d610d8f5c0c520c8391c37b86e837655ab12
Signed-off-by: Benoît Ganne <bganne@cisco.com>

src/vnet/ip/ip6_packet.h

diff --git a/src/vnet/ip/ip6_packet.h b/src/vnet/ip/ip6_packet.h
index b00eac7..e71604c 100644
--- a/src/vnet/ip/ip6_packet.h
+++ b/src/vnet/ip/ip6_packet.h
@@ -652,7 +652,7 @@
       i++;
       if (last)
 	break;
-      if (i > IP6_EXT_HDR_MAX)
+      if (i >= IP6_EXT_HDR_MAX)
 	break;
       next_header = ip6_ext_next_header_s (next_proto, next_header, max_offset,
 					   &offset, &next_proto, &last);