Re: [RFC v2 19/19] ima: Setup securityfs for IMA namespace
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From: Christian Brauner <hidden>
Date: 2021-12-06 11:52:32
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linux-integrity, lkml
On Fri, Dec 03, 2021 at 07:33:39PM -0500, Stefan Berger wrote:
On 12/3/21 14:11, Stefan Berger wrote:quoted
On 12/3/21 13:50, James Bottomley wrote:quoted
quoted
Where would the vfsmount pointer reside? For now it's in ima_namespace, but it sounds like it should be in a more centralized place? Should it also be connected to the user_namespace so we can pick it up using get_user_ns()?exactly. I think struct user_namespace should have two elements gated by a #ifdef CONFIG_SECURITYFS which are the vfsmount and the mount_count for passing into simple_pin_fs.Also that we can do for as long as it flies beyond the conversation here... :-) Anyone else have an opinion ?I moved it now and this greatly reduced the amount of changes. The dentries are now all in the ima_namespace and it works with one API. Thanks!
Ideally you only have one entry in struct user_namespace for ima that encompasses all information needed; not multiple entries. Similar to what I did for binfmt_misc https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/commit/?h=fs.binfmt_misc&id=eb50eb90a694e05f6fd6533951a56ca3ed040761 if that works.