Messages in this thread | | | Date | Wed, 19 Apr 2006 23:10:38 +0100 | From | Christoph Hellwig <> | Subject | Re: [RFC][PATCH 11/11] security: AppArmor - Export namespace semaphore |
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On Wed, Apr 19, 2006 at 10:50:34AM -0700, Tony Jones wrote: > This patch exports the namespace_sem semaphore. > > The shared subtree patches which went into 2.6.15-rc1 replaced the old > namespace semaphore which used to be per namespace (and visible) with a > new single static semaphore. > > The reason for this change is that currently visibility of vfsmount information > to the LSM hooks is fairly patchy. Either there is no passed parameter or > it can be NULL. For the case of the former, several LSM hooks that we > require to mediate have no vfsmount/nameidata passed. We previously (mis)used > the visibility of the old per namespace semaphore to walk the processes > namespace looking for vfsmounts with a root dentry matching the dentry we were > trying to mediate. > > Clearly this is not viable long term strategy and changes working towards > passing a vfsmount to all relevant LSM hooks would seem necessary (and also > useful for other users of LSM). Alternative suggestions and ideas are welcomed.
Just don't do it. No module has any business looking in there, and no non-modular code outside a few files in fs/ either. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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