linux-kernel - Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to partition

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Date:	Thu, 03 May 2012 14:47:56 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Mark Lord <kernel@...savvy.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, Jan Kara <jack@...e.cz>,
	Jens Axboe <axboe@...nel.dk>,
	LKML <linux-kernel@...r.kernel.org>,
	James Bottomley <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to partition

Il 03/05/2012 14:40, Mark Lord ha scritto:
>> > 
>> > Breaking "hdparm --write-sector /dev/sda1"?  I call it a security fix.
> No, that would plain stupid on both our parts.  :)
> The --write-sector flag is allowed only for non-partitions by hdparm itself.

Excuse my laziness--how does it check?  Most programs I looked at check
at the shape of the file and some are even fooled by "ln -sf /dev/sda1
./sda".

> But other flags commonly used by distros at boot time
> seem to be triggering the current in-kernel noise.
> Dunno which flags, I'm just ignoring them and waiting
> for the noise message to get reverted.

That's exactly the behavior I hoped to get when I added the warnings.
Or maybe not. :)  What are the messages?  i.e. what ioctl do they
complain about?

Paolo
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