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    SubjectRe: Trivial hard lockup, SCSI, 2.4.23


    On Tue, 16 Dec 2003, Ian Soboroff wrote:

    >
    > I've found that I can lock a machine running 2.4.23aa1 by trying to
    > access a nonexistent SCSI device. In other words, if a userspace
    > program tries to access /dev/sdd, but no device is attached on any
    > SCSI bus using that device node, the machine locks hard.
    >
    > We found this when we disconnected a SCSI hardware RAID from a server,
    > but forgot to remove the cron job which checked its status.
    >
    > The lockup leaves no errors whatsoever in the logs. I finally tracked
    > it down with the NMI watchdog.

    What did the NMI oopser report ?

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