Re: mdadm: sending ioctl 1261 to a partition!

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On Tue, 06 Mar 2012 05:53:28 +1100 Steven Haigh <netwiz@xxxxxxxxx> wrote:

> On 6/03/2012 1:52 AM, John Robinson wrote:
> > On 05/03/2012 13:03, Steven Haigh wrote:
> >> I've noticed that recently I've managed to get a ton of messages like
> >> this at boot:
> >>
> >> mdadm: sending ioctl 1261 to a partition!
> >> mdadm: sending ioctl 800c0910 to a partition!
> >
> > It's probably harmless.
> >
> > http://lists.debian.org/debian-kernel/2012/01/msg01105.html says "This
> > warning was introduced as part of the fix for CVE-2011-4127"
> >
> > https://bugzilla.redhat.com/show_bug.cgi?id=783955#c4 says "Actually,
> > the warning seems a false positive to me"
> 
> I did see these - and I probably should have mentioned it in the 
> original post. Naughty me for posting at times I should really be asleep.
> 
> The general jist of it seemed to be "it always failed before, now we 
> just know about it". What makes me wonder is that if it always failed 
> before, why do we do it in the first place?
> 

800c0910 is 'are you an md device'.  So failure is a valid response.

1261 is flush-bufs.  I hope that does still work on partitions....

NeilBrown

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