NetBSD Problem Report #55849
From www@netbsd.org Tue Dec 8 08:54:33 2020
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for <gnats-bugs@gnats.NetBSD.org>; Tue, 8 Dec 2020 08:54:33 +0000 (UTC)
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Date: Tue, 8 Dec 2020 08:54:31 +0000 (UTC)
From: s-yamaguchi@iij.ad.jp
Reply-To: s-yamaguchi@iij.ad.jp
To: gnats-bugs@NetBSD.org
Subject: panic LOCKDEBUG in agr(4)
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>Number: 55849
>Category: kern
>Synopsis: panic LOCKDEBUG in agr(4)
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Dec 08 08:55:00 +0000 2020
>Originator: Shoichi Yamaguchi
>Release: NetBSD 9.99.76
>Organization:
Internet Initiative Japan Inc.
>Environment:
NetBSD hidden 9.99.76 NetBSD 9.99.76 (DEV) #13: Fri Dec 4 14:29:29 JST 2020 hidden:obj/sys/arch/amd64/compile/DEV amd64
>Description:
# [ 49784.7497435] Mutex error: mutex_vector_enter,516: spin lock held
[ 49784.7497435] lock address : 0xfffff185a6430550 type : spin
[ 49784.7497435] initialized : 0xffffffff80e2085f
[ 49784.7497435] shared holds : 0 exclusive: 1
[ 49784.7497435] shares wanted: 0 exclusive: 0
[ 49784.7497435] relevant cpu : 0 last held: 0
[ 49784.7497435] relevant lwp : 0xfffff185a64aaac0 last held: 0xfffff185a64aaac0
[ 49784.7497435] last locked* : 0xffffffff80e226a2 unlocked : 0xffffffff80cdab80
[ 49784.7497435] owner field : 0x0000000000010600 wait/spin: 0/1
[ 49784.7654397] panic: LOCKDEBUG: Mutex error: mutex_vector_enter,516: spin lock held
[ 49784.7654397] cpu0: Begin traceback...
[ 49784.7654397] vpanic() at netbsd:vpanic+0x156
[ 49784.7654397] snprintf() at netbsd:snprintf
[ 49784.7654397] lockdebug_more() at netbsd:lockdebug_more
[ 49784.7654397] mutex_enter() at netbsd:mutex_enter+0x392
[ 49784.7654397] ifmedia_ioctl() at netbsd:ifmedia_ioctl+0x268
[ 49784.7654397] iavf_ioctl() at if_iavf:iavf_ioctl+0x59
[ 49784.7654397] agr_port_getmedia() at netbsd:agr_port_getmedia+0x60
[ 49784.7654397] agrport_monitor() at netbsd:agrport_monitor+0x76
[ 49784.7654397] agrtimer_port_tick() at netbsd:agrtimer_port_tick+0x13
[ 49784.7654397] agr_port_foreach() at netbsd:agr_port_foreach+0x30
[ 49784.7654397] agrtimer_work() at netbsd:agrtimer_work+0x47
[ 49784.7654397] workqueue_worker() at netbsd:workqueue_worker+0xd7
[ 49784.7654397] cpu0: End traceback...
[ 49784.7654397] rebooting...
>How-To-Repeat:
% ifconfig agr0 create
% ifconfig agr0 agrport iavf0
% ifconfig iavf0 up
% ifconfig agr0 up
>Fix:
Use an adaptive mutex for sc_lock in agr_softc, not a spin mutex
(Contact us)
$NetBSD: query-full-pr,v 1.46 2020/01/03 16:35:01 leot Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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