Date: Mon, 30 Nov 1998 21:13:51 +0100 (CET) From: marcel@scc.nl To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: ports/8909: ucd-snmp-3.5.3 on FreeBSD-current Message-ID: <199811302013.VAA68309@scones.sup.scc.nl>
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>Number: 8909
>Category: ports
>Synopsis: snmpd enters endless loop due to snmpwalk.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-ports
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Nov 30 12:20:01 PST 1998
>Last-Modified:
>Originator: Marcel Moolenaar
>Organization:
SCC vof
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
FreeBSD scones.sup.scc.nl 3.0-CURRENT FreeBSD 3.0-CURRENT #9:
Fri Nov 27 00:08:21 CET 1998
marcel@scones.sup.scc.nl:/usr/src/sys/compile/SCONES i386
>Description:
When using snmpwalk, the agent (snmpd) enters a endless loop.
The loop consists of a repeated failing action; writing to the
logfile in each iteration and thus filling the filesystem in
minutes.
Cause: Returncodes are not checked and acted upon.
("never fail" assumed?)
>How-To-Repeat:
Run snmpwalk after restarting the agent.
>Fix:
Apply the following patch:
*** agent/mibgroup/mibII/tcp.c.orig Mon Nov 30 20:00:46 1998
--- agent/mibgroup/mibII/tcp.c Mon Nov 30 20:04:04 1998
***************
*** 818,823 ****
--- 818,824 ----
if((klookup((unsigned long)next, (char *)&inpcb, sizeof (inpcb)) == 0)) {
perror("TCP_Count_Connections - inpcb");
+ break;
}
#if !(defined(freebsd2) || defined(netbsd1) || defined(openbsd2))
if (inpcb.INP_PREV_SYMBOL != prev) { /* ??? */
***************
*** 951,962 ****
next = tcp_inpcb.INP_NEXT_SYMBOL;
! klookup((unsigned long)next, (char *)&tcp_inpcb, sizeof (tcp_inpcb));
#if !(defined(netbsd1) || defined(freebsd2)) || defined(openbsd2)
if (tcp_inpcb.INP_PREV_SYMBOL != tcp_prev) /* ??? */
return(-1); /* "FAILURE" */
#endif /* !(defined(netbsd1) || defined(freebsd2) || defined(openbsd2)) */
! klookup ( (int)tcp_inpcb.inp_ppcb, (char *)&tcpcb, sizeof (tcpcb));
*State = tcpcb.t_state;
#else /* linux */
if (! tcp_prev)
--- 952,965 ----
next = tcp_inpcb.INP_NEXT_SYMBOL;
! if (!klookup((unsigned long)next,(char *)&tcp_inpcb,sizeof(tcp_inpcb)))
! return 0;
#if !(defined(netbsd1) || defined(freebsd2)) || defined(openbsd2)
if (tcp_inpcb.INP_PREV_SYMBOL != tcp_prev) /* ??? */
return(-1); /* "FAILURE" */
#endif /* !(defined(netbsd1) || defined(freebsd2) || defined(openbsd2)) */
! if (!klookup((int)tcp_inpcb.inp_ppcb, (char *)&tcpcb, sizeof (tcpcb)))
! return 0;
*State = tcpcb.t_state;
#else /* linux */
if (! tcp_prev)
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