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    Subject[RFC PATCH 5/5] ima: Add ns_mnt, dev, ino fields to IMA audit measurement msgs
    Date
    From: Guilherme Magalhaes <guilherme.magalhaes@hpe.com>

    Extending audit measurement record with mount namespace id, file inode,
    and device name. These fields uniquely identify a pathname considering
    different mount namespaces. The file inode on a given device is unique
    and these fields are required to identify a namespace id since this id
    can be released and later reused by a different process.

    Signed-off-by: Guilherme Magalhaes <guilherme.magalhaes@hpe.com>

    Changelog:
    * Change the field name from "mnt_ns" to "ns_mnt"

    Signed-off-by: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>
    ---
    security/integrity/ima/ima_api.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
    index 4a77072..084b126 100644
    --- a/security/integrity/ima/ima_api.c
    +++ b/security/integrity/ima/ima_api.c
    @@ -18,6 +18,7 @@
    #include <linux/fs.h>
    #include <linux/xattr.h>
    #include <linux/evm.h>
    +#include <linux/proc_ns.h>

    #include "ima.h"

    @@ -296,6 +297,7 @@ void ima_audit_measurement(struct integrity_iint_cache *iint,
    char algo_hash[sizeof(hash) + strlen(algo_name) + 2];
    int i;
    unsigned long flags = iint_flags(iint, status);
    + struct ns_common *ns;

    if (flags & IMA_AUDITED)
    return;
    @@ -314,6 +316,14 @@ void ima_audit_measurement(struct integrity_iint_cache *iint,
    audit_log_format(ab, " hash=");
    snprintf(algo_hash, sizeof(algo_hash), "%s:%s", algo_name, hash);
    audit_log_untrustedstring(ab, algo_hash);
    + ns = mntns_operations.get(current);
    + if (!IS_ERR_OR_NULL(ns)) {
    + audit_log_format(ab, " ns_mnt=%u", ns->inum);
    + mntns_operations.put(ns);
    + }
    + audit_log_format(ab, " dev=");
    + audit_log_untrustedstring(ab, iint->inode->i_sb->s_id);
    + audit_log_format(ab, " ino=%lu", iint->inode->i_ino);

    audit_log_task_info(ab, current);
    audit_log_end(ab);
    --
    2.9.4
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