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authorDaniel Glöckner <dg@emlix.com>2017-02-24 15:05:14 +0100
committerMimi Zohar <zohar@linux.vnet.ibm.com>2017-03-07 07:06:10 -0500
commit1ac202e978e18f045006d75bd549612620c6ec3a (patch)
tree2ba303f2bf2a26ecc6defdd021696154f0b47869 /security/integrity
parentbad4417b692ede5cf31105b329cea1544875b526 (diff)
ima: accept previously set IMA_NEW_FILE
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> Cc: stable@vger.kernel.org Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima_appraise.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 1fd9539a969d..5d0785cfe063 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -207,10 +207,11 @@ int ima_appraise_measurement(enum ima_hooks func,
cause = "missing-hash";
status = INTEGRITY_NOLABEL;
- if (opened & FILE_CREATED) {
+ if (opened & FILE_CREATED)
iint->flags |= IMA_NEW_FILE;
+ if ((iint->flags & IMA_NEW_FILE) &&
+ !(iint->flags & IMA_DIGSIG_REQUIRED))
status = INTEGRITY_PASS;
- }
goto out;
}