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Date:   Thu, 05 Apr 2018 11:56:06 +0200
From:   Oleksandr Natalenko <>
To:     Kees Cook <>
Cc:     David Windsor <>,
        "James E.J. Bottomley" <>,
        "Martin K. Petersen" <>,, LKML <>,
Subject: Re: usercopy whitelist woe in scsi_sense_cache


04.04.2018 23:25, Kees Cook wrote:
> Thanks for the report! I hope someone more familiar with sg_io() can
> help explain the changing buffer offset... :P

Also, FYI, I kept the server running with smartctl periodically invoked, 
and it was still triggering BUGs, however, I consider them to be more or 
less harmless until the server got stuck with high I/O wait this morning 
after next smartctl invocation. So, it isn't harmless, it seems…

It could be unrelated, of course, since the journal didn't give me any 
hint (or a stack trace) on what happened, thus I'll monitor how things 
behave without smartctl too.


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