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When reflecting an ICMP Echo, do not scribble over read-only/shared 

mbuf storage.
This commit is contained in:
dyoung 2006-03-29 21:13:55 +00:00
parent 603c15a57f
commit 4db39a7dbf
1 changed files with 3 additions and 3 deletions
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6
sys/netinet/ip_icmp.c
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@ -1,4 +1,4 @@
/* $NetBSD: ip_icmp.c,v 1.98 2006/03/22 01:07:24 matt Exp $ */
/* $NetBSD: ip_icmp.c,v 1.99 2006/03/29 21:13:55 dyoung Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@ -101,7 +101,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ip_icmp.c,v 1.98 2006/03/22 01:07:24 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: ip_icmp.c,v 1.99 2006/03/29 21:13:55 dyoung Exp $");
#include "opt_ipsec.h"
@ -405,7 +405,7 @@ icmp_input(struct mbuf *m, ...)
goto freeit;
}
i = hlen + min(icmplen, ICMP_ADVLENMIN);
if (m->m_len < i && (m = m_pullup(m, i)) == 0) {
if ((m->m_len < i || M_READONLY(m)) && (m = m_pullup(m, i)) == 0) {
icmpstat.icps_tooshort++;
return;
}