linux/security/integrity
GUO Zihua 2d4bc60693 ima: Handle -ESTALE returned by ima_filter_rule_match()
[ Upstream commit c7423dbdbc ]

IMA relies on the blocking LSM policy notifier callback to update the
LSM based IMA policy rules.

When SELinux update its policies, IMA would be notified and starts
updating all its lsm rules one-by-one. During this time, -ESTALE would
be returned by ima_filter_rule_match() if it is called with a LSM rule
that has not yet been updated. In ima_match_rules(), -ESTALE is not
handled, and the LSM rule is considered a match, causing extra files
to be measured by IMA.

Fix it by re-initializing a temporary rule if -ESTALE is returned by
ima_filter_rule_match(). The origin rule in the rule list would be
updated by the LSM policy notifier callback.

Fixes: b169424551 ("ima: use the lsm policy update notifier")
Signed-off-by: GUO Zihua <guozihua@huawei.com>
Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:14:08 +01:00
..
evm Revert "evm: Fix memleak in init_desc" 2022-07-21 21:24:14 +02:00
ima ima: Handle -ESTALE returned by ima_filter_rule_match() 2022-12-31 13:14:08 +01:00
platform_certs efi: Correct Macmini DMI match in uefi cert quirk 2022-10-15 07:59:01 +02:00
digsig_asymmetric.c ima: fix reference leak in asymmetric_verify() 2022-02-16 12:56:03 +01:00
digsig.c ima: enable loading of build time generated key on .ima keyring 2021-04-09 10:40:20 -04:00
iint.c evm: Load EVM key in ima_load_x509() to avoid appraisal 2021-05-21 12:47:04 -04:00
integrity_audit.c integrity: check the return value of audit_log_start() 2022-02-16 12:56:03 +01:00
integrity.h crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
Kconfig powerpc: Load firmware trusted keys/hashes into kernel keyring 2019-11-13 00:33:23 +11:00
Makefile powerpc: Load firmware trusted keys/hashes into kernel keyring 2019-11-13 00:33:23 +11:00