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Date: Wed, 13 May 1998 11:19:38 -0500 (CDT)
From: toasty@home.dragondata.com
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Subject: kern/6623: non-root user can crash system if disconnected de card present
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>Number:         6623
>Category:       kern
>Synopsis:       non-root user can crash system if disconnected de card present
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 13 09:20:01 PDT 1998
>Last-Modified:
>Originator:     Kevin Day
>Organization:
DragonData Internet Services
>Release:        FreeBSD 2.2.5-STABLE i386
>Environment:

2.2.6 server with two de cards in it. de1 was 'down'... (hub went down, and
the card complained of a 'cable problem?')

>Description:

After a de device has decided it can't talk, you can make a server instantly
reboot (no panic)

ping -s 2048 (hostname of a server across the dead de card)...

For a while you'll get 'ping: sendto: host is down'. Then if you keep going,
'ping: sendto: no buffer space available'... (at this point, my de0 card
stopped responding as well). After a few more minutes, the machine just
rebooted.

>How-To-Repeat:

Unplug the cable to a de card, and send lots of traffic to it. (ifconfig
must still show the interface as 'up').

Also... Why after a card decides theres a cable problem will it not detect
the cable being put back in until you do a 'ifconfig de0 down'. (as soon a
syou type that, it suddenly sees the cable again) These are netgear 10/100
cards...

de0: <Digital 21140A Fast Ethernet> rev 0x22 int a irq 19 on pci0.17.0
de0: 21140A [10-100Mb/s] pass 2.2

>Fix:
	

>Audit-Trail:
>Unformatted:
Kevin Day

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