>Number:         10968
>Category:       bin
>Synopsis:       dhclient is broken
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Sep 06 23:13:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Lennart Augustsson
>Release:        NetBSD-current 2000-09-07
>Organization:
>Environment:
System: NetBSD sb-hobbes 1.5E NetBSD 1.5E (HOBBES) #4: Thu Sep 7 01:08:47 EDT 2000 augustss@sb-hobbes:/usr/src/sys/arch/i386/compile/HOBBES i386


>Description:
	If the data returned by ioctl(SIOCGIFCONF) exceeds 512 bytes
	the code in dhcp/common/discover.c breaks.
	The problem is the way buffer overflow is detected.  The NetBSD
	kernel just doesn't work the way the code around line 128
	assumes, so a bigger buffer is never allocated.
	Look at sys/net/if.c to see what happens.
>How-To-Repeat:
	Have lots of interfaces and see dhclient fail with a mysterious
	message about unconfigured interfaces.
>Fix:
	As a workaround I upped the buffer size from 512 to 8192 again.
	This is not a proper fix, but I managed to get dhclient working again
	before my lease expired. :)
>Release-Note:
>Audit-Trail:
>Unformatted: