Date: Wed, 30 Jan 2002 14:22:14 +0000 From: tim.borgeaud@genie.co.uk To: freebsd-questions@freebsd.org Subject: CD rip from nonexistant device causes panic Message-ID: <1012400534.webexpressdV3.1.f@mail.u.genie.co.uk>
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While experimenting with CD ripping I found that I could cause a crash with Fatal Trap 12 (superviser read page not present) with the seemingly innocent command. dd if=/dev/acd1t1 of=test.cdr bs=2352 conv=swab There is no acd1 in the system. I was curious because the track (acdXtY) nodes for acd1 were created along with creation of acd0 nodes. This seems bad to me, is it reasonable to crash the system by abusing device nodes like this? I'm only providing brief details. If anyone thinks this deserves more attention I can get some more details later on, I'm not at the machine at the mo. Note that I haven't explored this much because the machine needs to be usable. System uses a asustek cuv266 mainboard with VIA 82C686b (ATA100) controller. device ata device atadisk device atapicd options ATAPI_STATIC The atapi devices I have are 2 disks and 1 dvd rom drive: ata0-master ad0 UDMA33 ata0-slave dvdrom PIO4 ata1-master ad2 UDMA100 Tim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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