kern/153948: panic after "ifconfig age0 up" in r216925

[Pavel Polyakov]

>Number:         153948
>Category:       kern
>Synopsis:       panic after "ifconfig age0 up" in r216925
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jan 13 08:50:07 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Pavel Polyakov
>Release:        9.0-CURRENT Revision: 217222
>Organization:
>Environment:
FreeBSD pp.fss.sunpp 9.0-CURRENT FreeBSD 9.0-CURRENT #2 r217222: Mon Jan 10 15:49:36 EET 2011     root@:/usr/obj/usr/src/sys/WORK8SMP  amd64

>Description:
panic after "ifconfig age0 up" + ~3 seconds
panic: lock (sleep mutex) age0 not locked @ sys/dev/age/if_age.c:1714

Problem appeared after this change
r216925 | jhb | 2011-01-03 20:28:30 +0200

Downgrading sys/dev/age to the previous revision (r213893 | marius | 2010-10-15 17:52:11 +0300) and recompiling sys/modules/age "solves" this problem -
age(4) works like before last commit

----

Problem proved to appear on amd64 r217222 and i386 r217258.

age0 at pci0:2:0:0:        class=0x020000 card=0x82261043 chip=0x10481969 rev=0xb0 hdr=0x00
    vendor     = 'Attansic (Now owned by Atheros)'
    device     = 'Gigabit Ethernet 10/100/1000 Base-T Controller (Atheros L1)'
    class      = network
    subclass   = ethernet

>How-To-Repeat:
ifconfig age0 up
Using 9.0-C since r216925
>Fix:
downgrade sys/dev/age to r213893

>Release-Note:
>Audit-Trail:
>Unformatted: