Re: [PATCH 0/8] Security: Provide unioned file support

From	Miklos Szeredi <miklos@szeredi.hu>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/8] Security: Provide unioned file support
Date	2015-06-19 10:00 +0200
Message-ID	<pCZns-17v-23@gated-at.bofh.it> (permalink)
References	<pCIcV-1t5-3@gated-at.bofh.it> <pCYUp-zA-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jun 19, 2015 at 9:20 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> On Thu, Jun 18, 2015 at 02:32:15PM +0100, David Howells wrote:
>>
>> The attached patches provide security support for unioned files where the
>> security involves an object-label-based LSM (such as SELinux) rather than a
>> path-based LSM.
>>
>> The patches can be broken down into a number of sets:
>>
>>  (1) A small patch to drop a lock earlier in overlayfs.  The main VFS patch
>>      touches the same code, so I put this first.
>>
>>  (2) The main VFS patch that makes an open file struct referring to a union
>>      file have ->f_path point to the union/overlay file whilst ->f_inode and
>>      ->f_mapping refer to the subordinate file that does the actual work.
>
> #1 and #2 applied, will be in tomorrow vfs.git#for-next

Brave.

What's going to happen to all those f_path.dentry uses where the
filesystem thinks it's getting its own dentry?

> git grep f_path.dentry | wc -l
171

Thanks,
Miklos
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Thread

Re: [PATCH 0/8] Security: Provide unioned file support Al Viro <viro@ZenIV.linux.org.uk> - 2015-06-19 09:30 +0200
  Re: [PATCH 0/8] Security: Provide unioned file support Al Viro <viro@ZenIV.linux.org.uk> - 2015-06-19 10:00 +0200
    Re: [PATCH 0/8] Security: Provide unioned file support Miklos Szeredi <miklos@szeredi.hu> - 2015-06-19 10:20 +0200
      Re: [PATCH 0/8] Security: Provide unioned file support Al Viro <viro@ZenIV.linux.org.uk> - 2015-06-19 10:30 +0200
        Re: [PATCH 0/8] Security: Provide unioned file support Miklos Szeredi <miklos@szeredi.hu> - 2015-06-19 10:40 +0200
  Re: [PATCH 0/8] Security: Provide unioned file support Miklos Szeredi <miklos@szeredi.hu> - 2015-06-19 10:00 +0200
    Re: [PATCH 0/8] Security: Provide unioned file support David Howells <dhowells@redhat.com> - 2015-06-19 16:10 +0200

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