linux

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Files

Daniel Glöckner 08e589a97d ima: accept previously set IMA_NEW_FILE

commit 1ac202e978e18f045006d75bd549612620c6ec3a upstream.

Modifying the attributes of a file makes ima_inode_post_setattr reset
the IMA cache flags. So if the file, which has just been created,
is opened a second time before the first file descriptor is closed,
verification fails since the security.ima xattr has not been written
yet. We therefore have to look at the IMA_NEW_FILE even if the file
already existed.

With this patch there should no longer be an error when cat tries to
open testfile:

$ rm -f testfile
$ ( echo test >&3 ; touch testfile ; cat testfile ) 3>testfile

A file being new is no reason to accept that it is missing a digital
signature demanded by the policy.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-05-25 14:30:09 +02:00

apparmor

apparmor: fix change_hat not finding hat after policy replacement

2016-12-02 09:09:01 +01:00

integrity

ima: accept previously set IMA_NEW_FILE

2017-05-25 14:30:09 +02:00

keys

KEYS: fix keyctl_set_reqkey_keyring() to not leak thread keyrings

2017-04-27 09:09:31 +02:00

selinux

selinux: fix off-by-one in setprocattr