On 2020-05-24 13:41, Amol Grover wrote:

On Thu, Apr 02, 2020 at 11:26:38AM +0530, Amol Grover wrote:

quoted

task_struct::cred (subjective credentials) is *always* used
task-synchronously, hence, does not require RCU semantics.

task_struct::real_cred (objective credentials) can be used in
RCU context and its __rcu annotation is retained.

However, task_struct::cred and task_struct::real_cred *may*
point to the same object, hence, the object pointed to by
task_struct::cred *may* have RCU delayed freeing.

Suggested-by: Jann Horn <jannh@google.com>
Co-developed-by: Joel Fernandes (Google) <redacted>
Signed-off-by: Joel Fernandes (Google) <redacted>
Signed-off-by: Amol Grover <redacted>

Hello everyone,

Could you please go through patches 1/3 and 2/3 and if deemed OK, give
your acks. I sent the original patch in beginning of February (~4 months
back) and resent the patches again in beginning of April due to lack of
traffic. Paul Moore was kind enough to ack twice - the 3/3 and its
resend patch. However these 2 patches still remain. I'd really
appreciate if someone reviewed them.

I asked on April 3 which upstream tree you expect this patchset to go
through and I did not see a reply.  Do you have a specific target or is
the large addressee list assuming someone else is taking this set?  All
we have seen is that it is not intended to go through the audit tree.

Thanks
Amol

- RGB

--
Richard Guy Briggs [off-list ref]
Sr. S/W Engineer, Kernel Security, Base Operating Systems
Remote, Ottawa, Red Hat Canada
IRC: rgb, SunRaycer
Voice: +1.647.777.2635, Internal: (81) 32635

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