lkml.org 
[lkml]   [2022]   [Jan]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v9 13/23] ima: Only accept AUDIT rules for non-init_ima_ns namespaces for now
    Date
    From: Stefan Berger <stefanb@linux.ibm.com>

    Only accept AUDIT rules for non-init_ima_ns namespaces rejecting all rules
    that require support for measuring, appraisal, and hashing.

    Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>

    ---
    v9:
    - Jump to err_audit when unsupported rules are detected
    ---
    security/integrity/ima/ima_policy.c | 12 ++++++++++++
    1 file changed, 12 insertions(+)

    diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
    index 3b754b9f5ef7..e8140e73d80b 100644
    --- a/security/integrity/ima/ima_policy.c
    +++ b/security/integrity/ima/ima_policy.c
    @@ -1794,6 +1794,17 @@ static int ima_parse_rule(struct ima_namespace *ns,
    result = -EINVAL;
    break;
    }
    +
    + /* IMA namespace only accepts AUDIT rules */
    + if (ns != &init_ima_ns && result == 0) {
    + switch (entry->action) {
    + case MEASURE:
    + case APPRAISE:
    + case HASH:
    + result = -EINVAL;
    + goto err_audit;
    + }
    + }
    }
    if (!result && !ima_validate_rule(entry))
    result = -EINVAL;
    @@ -1806,6 +1817,7 @@ static int ima_parse_rule(struct ima_namespace *ns,
    check_template_modsig(template_desc);
    }

    +err_audit:
    audit_log_format(ab, "res=%d", !result);
    audit_log_end(ab);
    return result;
    --
    2.31.1
    \
     
     \ /
      Last update: 2022-01-25 23:50    [W:2.135 / U:0.060 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site