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linux/security/integrity
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Roberto Sassu 2cfbb32f6c ima: do not update security.ima if appraisal status is not INTEGRITY_PASS 
commit 020aae3ee5 upstream.

Commit b65a9cfc2c ("Untangling ima mess, part 2: deal with counters")
moved the call of ima_file_check() from may_open() to do_filp_open() at a
point where the file descriptor is already opened.

This breaks the assumption made by IMA that file descriptors being closed
belong to files whose access was granted by ima_file_check(). The
consequence is that security.ima and security.evm are updated with good
values, regardless of the current appraisal status.

For example, if a file does not have security.ima, IMA will create it after
opening the file for writing, even if access is denied. Access to the file
will be allowed afterwards.

Avoid this issue by checking the appraisal status before updating
security.ima.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-11-24 08:33:41 +01:00
..
evm xattr: Add __vfs_{get,set,remove}xattr helpers 2016-10-07 20:10:44 -04:00
ima ima: do not update security.ima if appraisal status is not INTEGRITY_PASS 2017-11-24 08:33:41 +01:00
digsig.c IMA: Use the the system trusted keyrings instead of .ima_mok 2016-04-11 22:49:15 +01:00
digsig_asymmetric.c X.509: Make algo identifiers text instead of enum 2016-03-03 21:49:27 +00:00
iint.c integrity: add measured_pcrs field to integrity cache 2016-06-30 01:14:19 -04:00
integrity.h integrity: add measured_pcrs field to integrity cache 2016-06-30 01:14:19 -04:00
integrity_audit.c Merge git://git.infradead.org/users/eparis/audit 2014-04-12 12:38:53 -07:00
Kconfig security: integrity: Remove select to deleted option PUBLIC_KEY_ALGO_RSA 2016-04-12 19:54:58 +01:00
Makefile integrity: make integrity files as 'integrity' module 2014-09-09 10:28:58 -04:00