NetBSD Problem Report #46600
From asau@inbox.ru Thu Jun 14 22:35:33 2012
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Date: Fri, 15 Jun 2012 02:35:05 +0400
From: Aleksej Saushev <asau@inbox.ru>
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To: gnats-bugs@gnats.NetBSD.org
Subject: Kernel panic when interrupting process reading from pad(4)
>Number: 46600
>Category: kern
>Synopsis: Kernel panic when interrupting process reading from pad(4)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Jun 14 22:40:00 +0000 2012
>Originator: asau@inbox.ru
>Release: NetBSD 6.0_BETA2
>Organization:
>Environment:
System: NetBSD lithium 6.0_BETA2 NetBSD 6.0_BETA2 (GENERIC) #1: Fri Jun 15 01:50:28 MSK 2012 asau@lithium:/usr/obj/sys/arch/i386/compile/GENERIC i386
Architecture: i386
Machine: i386
>Description:
Interrupting process that reads from pad(4) device brings system down.
Kernel crash dump isn't saved by "sync", "reboot" doesn't work either,
manually recorded backtrace is as follows:
sleepq_reinsert
sigpost
kpsignal2
kpsignal
kpgsignal
pgsignal
ttysigintr
softinr_dispatch
trap type 6 code 0
Backtrace on second CPU is less interesting:
x86___pause
kevent1
sys___kevent50
syscall
>How-To-Repeat:
With freshly built kernel (and modules) from netbsd-6:
mpg123 some-file.mp3 &
cat < /dev/pad0 > test.wav # intterrupt this process, e.g. by pressing ctrl-C in tty.
>Fix:
None.
(Contact us)
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