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linux/security/integrity
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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
..
evm EVM: Use crypto_memneq() for digest comparisons 2016-02-16 10:55:28 +00:00
ima ima: accept previously set IMA_NEW_FILE 2017-08-26 02:14:23 +01:00
digsig.c Revert "ima: define '_ima' as a builtin 'trusted' keyring" 2013-11-23 16:36:35 -08:00
digsig_asymmetric.c ima: read and use signature hash algorithm 2013-10-25 17:16:59 -04:00
iint.c integrity: fix checkpatch errors 2014-03-07 12:15:45 -05:00
integrity.h ima: check xattr value length and type in the ima_inode_setxattr() 2014-11-13 11:48:50 +00:00
integrity_audit.c Merge git://git.infradead.org/users/eparis/audit 2014-04-12 12:38:53 -07:00
Kconfig integrity: move integrity_audit_msg() 2013-06-20 07:47:49 -04:00
Makefile security: cleanup Makefiles to use standard syntax for specifying sub-directories 2014-02-17 11:08:04 +11:00