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Message-Id: <200507212340.j6LNemOd099139@www.freebsd.org>
Date: Thu, 21 Jul 2005 23:40:48 GMT
From: Ryota Hirose <hirose@comm.yamaha.co.jp>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Kernel panic when received ICMP TOO_BIG by ping6 -m
X-Send-Pr-Version: www-2.3

>Number:         83885
>Category:       kern
>Synopsis:       [panic] Kernel panic when received ICMP TOO_BIG by ping6 -m
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    gnn
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jul 21 23:50:24 GMT 2005
>Closed-Date:    Sun Jun 18 04:53:23 GMT 2006
>Last-Modified:  Sun Jun 18 04:53:23 GMT 2006
>Originator:     Ryota Hirose
>Release:        5.4-RC4
>Organization:
Yamaha Corporation
>Environment:
FreeBSD thebe.comm.yamaha.co.jp 5.4-RC4 FreeBSD 5.4-RC4 #13: Fri Jul 22 08:19:44 JST 2005     hirose@thebe.comm.yamaha.co.jp:/usr/src/sys/i386/compile/THEBE  i386

>Description:
Kernel will panic when execute ping6 -m and receive ICMP TOO_BIG error for that ICMP Echo.

>How-To-Repeat:

PC1---------------ROUTER--------------PC2
     MTU=1500                MTU=1280

PC1# ping6 -m -s 1300 PC2

>Fix:
--- uipc_socket.c.orig  Fri Jul 22 08:26:08 2005
+++ uipc_socket.c       Fri Jul 22 08:03:39 2005
@@ -1174,7 +1174,10 @@
                        }
                        cm = cmn;
                }
-               nextrecord = so->so_rcv.sb_mb->m_nextpkt;
+               if (so->so_rcv.sb_mb)
+                       nextrecord = so->so_rcv.sb_mb->m_nextpkt;
+               else
+                       nextrecord = NULL;
                orig_resid = 0;
        }
        if (m != NULL) {

>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->gnn 
Responsible-Changed-By: rwatson 
Responsible-Changed-When: Fri Jul 22 10:30:04 GMT 2005 
Responsible-Changed-Why:  
Assign to George Neville-Neil, who has started looking at this. 


http://www.freebsd.org/cgi/query-pr.cgi?pr=83885 
State-Changed-From-To: open->feedback 
State-Changed-By: gnn 
State-Changed-When: Thu Jul 28 11:22:39 GMT 2005 
State-Changed-Why:  


http://www.freebsd.org/cgi/query-pr.cgi?pr=83885 
State-Changed-From-To: feedback->closed 
State-Changed-By: gnn 
State-Changed-When: Sun Jun 18 04:52:44 UTC 2006 
State-Changed-Why:  
MFC'd and tested in all STABLE(6) and HEAD(7) 
gnatS: Enter the reason for changing this PR's state here. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=83885 
>Unformatted:
