Date: 25 Jun 2002 15:04:28 -0000 From: Michal Pasternak <michal@pasternak.w.lub.pl> To: FreeBSD-gnats-submit@FreeBSD.org Subject: i386/39844: PANIC using mount -> atacontrol detach -> ls/cat that device Message-ID: <20020625150428.790.qmail@pr93.lublin.sdi.tpnet.pl>
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>Number: 39844 >Category: i386 >Synopsis: PANIC using mount -> atacontrol detach -> ls/cat that device >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Jun 25 08:10:09 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Michal Pasternak >Release: FreeBSD 4.6-STABLE i386 >Organization: >Environment: System: FreeBSD pasternak.w.lub.pl 4.6-STABLE FreeBSD 4.6-STABLE #1: Tue Jun 18 04:33:07 CEST 2002 doc@pasternak.w.lub.pl:/usr/obj/usr/src/sys/ILIT i386 >Description: Using devices, that are mounted, but their controllers are detached (using atacontrol) causes PANIC. My config: atapci0: <VIA 82C686 ATA66 controller> port 0xd000-0xd00f at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 ad0: 8223MB <ST38410A> [16708/16/63] at ata0-master UDMA66 acd0: CDROM <ATAPI CDROM 48X> at ata1-slave PIO4 >How-To-Repeat: 1. mount something on 2nd IDE controller (ata1) 2. detach IDE controller (atacontrol detach 1) 3. ls or cat mounted device - system panics >Fix: I have some ideas, like: 1. atacontrol SHOULD NOT allow to detach controllers, which have mounted devices 2. atacountrol should DISPLAY A BIG FAT WARNING and ASK FOR A CONFIRMATION when trying to detach controller with mounted device 3. atacountrol should automagically umount devices 4. manpage should DISPLAY A BIG FAT WARNING 5. additional checks in device drivers (is the device we're trying to read available, together with it's controller) could IMVHO slow things down, but I'm not a kernel hacker, so how should I know >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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