Messages in this thread Patch in this message | | | From | Vivek Goyal <> | Subject | [PATCH 6/6] ima: With appraise_type=optional, audit log some messages as info | Date | Thu, 14 Feb 2013 14:55:45 -0500 |
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Currently, if there integrity status is not INTEGRITY_PASS, it is logged in audit log (as non info). This is fine because we always deny access to file for anything other than INTEGRITY_PASS.
But with appraise_type=optional, we will allow access to file even if appraisal status is not INTEGRITY_PASS. For example, in the case of INTEGRITY_IMA_NOLABEL. And on this system we don't want to log each and every executed file which is not signed.
In a typical system we are anticipating that only 1-2 files will be signed.
So don't flood the audit logs if appraise_type=optional and no IMA label is present. These messages will still show up if somebody chooses to enable audit info messages.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com> --- security/integrity/ima/ima_appraise.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index af39a08..ddeadc7 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -124,7 +124,7 @@ int ima_appraise_measurement(int func, struct integrity_iint_cache *iint, enum integrity_status status = INTEGRITY_UNKNOWN; const char *op = "appraise_data"; char *cause = "unknown"; - int rc; + int rc, audit_info = 0; if (!ima_appraise) return 0; @@ -199,8 +199,16 @@ out: if (!ima_fix_xattr(dentry, iint)) status = INTEGRITY_PASS; } + + /* + * If appraisal is optional, and if no label is present, + * log it is info. Don't flood audit logs. + */ + if ((iint->flags & IMA_APPRAISAL_OPT) && + status == INTEGRITY_IMA_NOLABEL) + audit_info = 1; integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode, filename, - op, cause, rc, 0); + op, cause, rc, audit_info); } else { ima_cache_flags(iint, func); } -- 1.7.7.6
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