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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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