From 668d9f4193c5e83a39255c36054153775fefffc8 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 29 May 2002 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2002-05-29

---
 ip/icmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ip/icmp.c b/ip/icmp.c
index 9c0d2cfacf7525a5e118e10de8831fea8a144374..7d5256ef0e7005c1eb85dffe74c92418da90be91 100644
--- a/ip/icmp.c
+++ b/ip/icmp.c
@@ -343,6 +343,8 @@ icmpiput(Proto *icmp, Ipifc*, Block *bp)
 
 	switch(p->type) {
 	case EchoRequest:
+		if (iplen < n)
+			bp = trimblock(bp, 0, iplen);
 		r = mkechoreply(bp);
 		ipriv->out[EchoReply]++;
 		ipoput4(icmp->f, r, 0, MAXTTL, DFLTTOS);