[PATCH 4.19 0/3] Backport handling -ESTALE policy update failure to 4.19

[GUO Zihua <guozihua@huawei.com>]

This series backports patches in order to resolve the issue discussed here:
https://lore.kernel.org/selinux/389334fe-6e12-96b2-6ce9-9f0e8fcb85bf@huawei.com/

This required backporting the non-blocking LSM policy update mechanism
prerequisite patches.

Paul Moore has reviewed the non-blocking LSM policy update backport,
saying the SELinux part look good. The patchset was also reviewed by Mimi
Zohar
and everything looks ok.

I've tested the patches against the said issue and can confirm that the
issue is fixed. I've also run the LTP testcases on the fixed IMA and all
tests are passed.

This is a re-send of the original patchset as the original patchset
might have a faulty cover letter. The original patchset could be found
here:
https://patchwork.kernel.org/project/linux-integrity/list/?series=709367

GUO Zihua (1):
  ima: Handle -ESTALE returned by ima_filter_rule_match()

Janne Karhunen (2):
  LSM: switch to blocking policy update notifiers
  ima: use the lsm policy update notifier

 drivers/infiniband/core/device.c    |   4 +-
 include/linux/security.h            |  12 +--
 security/integrity/ima/ima.h        |   2 +
 security/integrity/ima/ima_main.c   |   8 ++
 security/integrity/ima/ima_policy.c | 151 ++++++++++++++++++++++------
 security/security.c                 |  23 +++--
 security/selinux/hooks.c            |   2 +-
 security/selinux/selinuxfs.c        |   2 +-
 8 files changed, 155 insertions(+), 49 deletions(-)

-- 
2.17.1