Date: Thu, 9 Nov 2000 15:30:42 -0500 (EST) From: Christopher Rued <c.rued@xsb.com> To: freebsd-questions@freebsd.org Subject: crash with fd0/msdos_fs/more Message-ID: <14859.2418.463305.245239@chris.xsb.com>
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Hi, Last night, while attempting to do a `more' on a file on a MS-DOS floppy, my system crashed. I did not see the error message right away, and the next thing I knew the system was rebooting. So, I decided to try it again. Here's what I did: # mount_msdos /dev/fd0 /mnt # cd /mnt # cp I\ Quit.doc ~ vm_fault: pager read error, pid 3379 (cp) <-- from syslog, I think cp: /home/chris/I Quit.doc: Bad address # more I\ Quit.doc panic: vm_fault fault on nofault entry addr: c58f200 << system reboots >> This was on a FreeBSD 3.5-STABLE machine. I was curious at this point, and decided to check if the same thing would happen on my 4.1.1-RELEASE machine: # mount_msdos /dev/fd0 /mnt # cd /mnt # cp I\ Quit.doc ~ vm_fault: pager read error, pid 58 (cp) <-- from syslog, I think cp: /home/chris/I Quit.doc: Bad address # more I\ Quit.doc << Here, I got a couple of screenfuls of junk with @^ and <FF>, etc, which is probably OK, since it is a MS-Word doc. >> panic: isa_dmacheck: no physical page present. << system reboots >> I imagine that I should probably submit a bug report for this, since I really don't think a bad floppy should crash my system :). This is not really a major problem, but I think it's an issue. It only happens on the one specific file. I am able to access the other files on the disk without a problem. Has anyone heard of such a thing happening? Why would `more' consistently crash my system, but `cp' not? I think cp handled it properly -- report the error without crashing. The problem is with more. I haven't tried any other commands on the file. What category would this go into? `misc', `kern', `bin', `i386', other? -- Christopher Rued To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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