linux-kernel - Re: [PATCH v3 1/3] uio: add ioctl support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151006181610-mutt-send-email-mst@redhat.com>
Date:	Tue, 6 Oct 2015 18:19:34 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Gleb Natapov <gleb@...lladb.com>
Cc:	Vlad Zolotarov <vladz@...udius-systems.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Bruce Richardson <bruce.richardson@...el.com>,
	linux-kernel@...r.kernel.org, hjk@...sjkoch.de,
	avi@...udius-systems.com, corbet@....net,
	alexander.duyck@...il.com, gleb@...udius-systems.com,
	stephen@...workplumber.org
Subject: Re: [PATCH v3 1/3] uio: add ioctl support

On Tue, Oct 06, 2015 at 05:30:31PM +0300, Gleb Natapov wrote:
> On Tue, Oct 06, 2015 at 05:19:22PM +0300, Michael S. Tsirkin wrote:
> > On Tue, Oct 06, 2015 at 11:33:56AM +0300, Vlad Zolotarov wrote:
> > > the solution u propose should be a matter of a separate patch and is
> > > obviously orthogonal to this series.
> > 
> > Doesn't work this way, sorry. You want a patch enabling MSI merged,
> > you need to secure the MSI configuration.
> > 
> MSI can be enabled right now without the patch by writing directly into
> PCI bar.

By poking at config registers in sysfs? We can block this, or we
can log this, pretty easily. We don't ATM but it's not hard to do.

> The only thing this patch adds is forwarding the interrupt to
> an eventfd.

This one just adds a bunch of ioctls. The next ones do
more than you describe.

> --
> 			Gleb.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/