NetBSD Problem Report #23203

Received: (qmail 26972 invoked by uid 605); 20 Oct 2003 03:50:20 -0000
Message-Id: <20031020035018.BF0621E10E6@yeah-baby.shagadelic.org>
Date: Sun, 19 Oct 2003 20:50:18 -0700 (PDT)
From: thorpej@shagadelic.org
Sender: gnats-bugs-owner@NetBSD.org
Reply-To: thorpej@shagadelic.org
To: gnats-bugs@gnats.netbsd.org
Subject: sysctl_rtable can deplete the kmem_map
X-Send-Pr-Version: 3.95

>Number:         23203
>Category:       kern
>Synopsis:       sysctl_rtable can deplete the kmem_map
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Oct 20 03:51:00 +0000 2003
>Closed-Date:    
>Last-Modified:  
>Originator:     Jason R Thorpe
>Release:        NetBSD 1.6ZC
>Organization:
        -- Jason R. Thorpe <thorpej@shagadelic.org>
>Environment:


System: NetBSD gw-wlan.shagadelic.org 1.6ZC NetBSD 1.6ZC (SHAG-NET4501) #85: Sat Sep 27 13:26:06 PDT 2003  thorpej@yeah-baby.shagadelic.org:/u1/netbsd/src/sys/arch/i386/compile/SHAG-NET4501 i386
Architecture: i386
Machine: i386
>Description:
	I have experienced several crashes of my NetBSD-based 802.11 AP
	today.  All of them were "out of space in kmem_map" panics, and
	all of them had sysctl_rtable() in the stack trace.

	Upon looking at the code for sysctl_rtable() it does appear as
	though it will loop, allocating memory effectively without bound,
	as a temporary buffer.

>How-To-Repeat:
	Sorry, I don't have a precise set of steps for preproducing the
	problem.  This AP has been running fine for quite some time, but
	started acting up just today.

>Fix:
	Unknown.
>Release-Note:
>Audit-Trail:
>Unformatted:

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