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linux/security/integrity/ima
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Daniel Glöckner b297f0a229 ima: accept previously set IMA_NEW_FILE 
commit 1ac202e978 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: Ben Hutchings <ben@decadent.org.uk>
History 2017-08-26 02:14:23 +01:00
..
ima.h ima: pass 'opened' flag to identify newly created files 2017-08-26 02:14:23 +01:00
ima_api.c ima: audit log files opened with O_DIRECT flag 2014-06-03 14:21:50 -05:00
ima_appraise.c ima: accept previously set IMA_NEW_FILE 2017-08-26 02:14:23 +01:00
ima_crypto.c ima: fix fallback to use new_sync_read() 2014-10-30 09:40:16 -07:00
ima_fs.c ima: fix ima_show_template_data_ascii() 2015-07-15 10:00:38 +01:00
ima_init.c security: integrity: Use a more current logging style 2014-03-07 12:15:21 -05:00
ima_main.c ima: pass 'opened' flag to identify newly created files 2017-08-26 02:14:23 +01:00
ima_policy.c ima: extend "mask" policy matching support 2015-08-27 15:06:54 +01:00
ima_queue.c integrity: fix checkpatch errors 2014-03-07 12:15:45 -05:00
ima_template.c integrity: fix checkpatch errors 2014-03-07 12:15:45 -05:00
ima_template_lib.c ima: fix ima_show_template_data_ascii() 2015-07-15 10:00:38 +01:00
ima_template_lib.h ima: extend the measurement list to include the file signature 2013-10-31 20:19:35 -04:00
Kconfig Revert "ima: define '_ima' as a builtin 'trusted' keyring" 2013-11-23 16:36:35 -08:00
Makefile ima: define template fields library and new helpers 2013-10-25 17:17:05 -04:00