Re: [PATCH] compat ioctl security hook fixup

From: Andi Kleen
Date: Thu Jan 20 2005 - 23:21:58 EST


On Thu, Jan 20, 2005 at 05:26:56PM -0800, Chris Wright wrote:
> * Michael S. Tsirkin (mst@xxxxxxxxxxxxxx) wrote:
> > Security hook seems to be missing before compat_ioctl in mm2.
> > And, it would be nice to avoid calling it twice on some paths.
> >
> > Chris Wright's patch addressed this in the most elegant way I think,
> > by adding vfs_ioctl.
>
> The patch below is against Linus' tree as per Andrew's request. It will
> conflict with some of the changes in -mm2 (including the some-fixes bit
> from Andi, and LTT). I also have a patch directly against -mm2 if anyone
> would like to see that instead.

I'm not sure really adding vfs_ioctl is a good idea politically.
I predict we'll see drivers starting to use it, which will cause quite
broken design.

If you add it make at least sure it's not EXPORT_SYMBOL()ed.

-Andi
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