android_kernel_samsung_univ.../security
Roberto Sassu a9100b6f1a ima: do not update security.ima if appraisal status is not INTEGRITY_PASS
commit 020aae3ee58c1af0e7ffc4e2cc9fe4dc630338cb 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>
2017-11-24 08:32:24 +01:00
..
apparmor
integrity ima: do not update security.ima if appraisal status is not INTEGRITY_PASS 2017-11-24 08:32:24 +01:00
keys security/keys: add CONFIG_KEYS_COMPAT to Kconfig 2017-11-18 11:11:07 +01:00
selinux
smack lsm: fix smack_inode_removexattr and xattr_getsecurity memleak 2017-10-12 11:27:32 +02:00
tomoyo
yama
commoncap.c
device_cgroup.c
inode.c
Kconfig
lsm_audit.c
Makefile
min_addr.c
security.c