Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden

James Morris <[email protected]> wrote:

> > +static u32 selinux_set_fscreate_secid(u32 secid)
> ...
> The ability to set this needs to be mediated via MAC policy.

There could a problem with that...  Is it possible for there to be a race?  I
have to call the function twice per cache op: once to set the file creation
security ID and once to restore it back to what it was.

However, what happens if I can't restore the original security ID (perhaps the
rules changed between the two invocations)?  I can't let the task continue as
it's now running with the wrong security...

David
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: David Howells <[email protected]>
  • Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: David Howells <[email protected]>
  • Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: David Howells <[email protected]>
  • Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: James Morris <[email protected]>

• References:
  • Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: James Morris <[email protected]>
  • [PATCH 00/19] Permit filesystem local caching and NFS superblock sharing
    • From: David Howells <[email protected]>
  • [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
    • From: David Howells <[email protected]>

• Prev by Date: Re: [PATCH 1/1] security: introduce fs caps
• Next by Date: Re: [PATCH 05/19] NFS: Use local caching
• Previous by thread: Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
• Next by thread: Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]