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Subject[RFC PATCH v4 0/5] ima: Namespacing IMA
Date
This patch set implements an IMA namespace data structure that gets
created by first writing a '1' into IMA's securityfs unshare file at
/sys/kernel/security/ima/unshare and then by clone(). This patch set
lays down the foundation for namespacing the different aspects of IMA
(eg. IMA-audit, IMA-measurement, IMA-appraisal).

The original PoC patches created a new CLONE_NEWIMA flag to explicitly
control when a new IMA namespace should be created. The previously posted
version 2 of this series had it hooked on the mount namespace, which was
regarded as inappropriate. The subsequent v3 tied it to the creation of a
user namespace. Based on comments, we elected to now again create an
independent IMA namespace through the above mentioned securityfs file.

The first patch creates the ima_namespace data, while the second patch
puts the iint->flags in the namespace. The third patch introduces an
audit message type for IMA policy rules. The fourth patch introduces
a new IMA policy rule attribute 'ns' making rules only applicable to child
IMA namespaces. The last patch uses the flags for namespacing the
IMA-audit messages, enabling the same file to be audited each time it
is accessed in a new namespace.

Stefan

Mehmet Kayaalp (2):
ima: Add ns_status for storing namespaced iint data
ima: namespace audit status flags

Mimi Zohar (1):
ima: differentiate auditing policy rules from "audit" actions

Stefan Berger (1):
ima: extend IMA audit policy rules with attribute to audit namespaces

Yuqiong Sun (1):
ima: Add IMA namespace support

fs/proc/namespaces.c | 3 +
include/linux/ima.h | 53 +++++++++
include/linux/nsproxy.h | 2 +
include/linux/proc_ns.h | 1 +
include/linux/sched.h | 6 +
include/linux/user_namespace.h | 1 +
include/uapi/linux/audit.h | 3 +-
init/Kconfig | 11 ++
kernel/fork.c | 5 +
kernel/nsproxy.c | 25 ++++-
kernel/ucount.c | 1 +
security/integrity/ima/Makefile | 3 +-
security/integrity/ima/ima.h | 82 +++++++++++++-
security/integrity/ima/ima_api.c | 14 ++-
security/integrity/ima/ima_appraise.c | 2 +-
security/integrity/ima/ima_fs.c | 55 ++++++++++
security/integrity/ima/ima_init.c | 4 +
security/integrity/ima/ima_init_ima_ns.c | 51 +++++++++
security/integrity/ima/ima_main.c | 18 ++-
security/integrity/ima/ima_ns.c | 183 +++++++++++++++++++++++++++++++
security/integrity/ima/ima_ns_status.c | 133 ++++++++++++++++++++++
security/integrity/ima/ima_policy.c | 77 ++++++++++++-
22 files changed, 712 insertions(+), 21 deletions(-)
create mode 100644 security/integrity/ima/ima_init_ima_ns.c
create mode 100644 security/integrity/ima/ima_ns.c
create mode 100644 security/integrity/ima/ima_ns_status.c

--
2.14.3

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