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    Subject[PATCH v10 16/27] ima: Implement ima_free_policy_rules() for freeing of an ima_namespace
    Date
    Implement ima_free_policy_rules() that is needed when an ima_namespace
    is freed.

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

    ---
    v10:
    - Not calling ima_delete_rules() anymore
    - Move access check from ima_delete_rules into very last patch

    v9:
    - Only reset temp_ima_appraise when using init_ima_ns.
    ---
    security/integrity/ima/ima.h | 1 +
    security/integrity/ima/ima_policy.c | 14 ++++++++++++++
    2 files changed, 15 insertions(+)

    diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
    index aea8fb8d2854..8c757223d549 100644
    --- a/security/integrity/ima/ima.h
    +++ b/security/integrity/ima/ima.h
    @@ -329,6 +329,7 @@ void ima_update_policy_flags(struct ima_namespace *ns);
    ssize_t ima_parse_add_rule(struct ima_namespace *ns, char *rule);
    void ima_delete_rules(struct ima_namespace *ns);
    int ima_check_policy(struct ima_namespace *ns);
    +void ima_free_policy_rules(struct ima_namespace *ns);
    void *ima_policy_start(struct seq_file *m, loff_t *pos);
    void *ima_policy_next(struct seq_file *m, void *v, loff_t *pos);
    void ima_policy_stop(struct seq_file *m, void *v);
    diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
    index 2dcc5a8c585a..fe3dce8fb939 100644
    --- a/security/integrity/ima/ima_policy.c
    +++ b/security/integrity/ima/ima_policy.c
    @@ -1889,6 +1889,20 @@ void ima_delete_rules(struct ima_namespace *ns)
    }
    }

    +/**
    + * ima_free_policy_rules - free all policy rules
    + * @ns: IMA namespace that has the policy
    + */
    +void ima_free_policy_rules(struct ima_namespace *ns)
    +{
    + struct ima_rule_entry *entry, *tmp;
    +
    + list_for_each_entry_safe(entry, tmp, &ns->ima_policy_rules, list) {
    + list_del(&entry->list);
    + ima_free_rule(entry);
    + }
    +}
    +
    #define __ima_hook_stringify(func, str) (#func),

    const char *const func_tokens[] = {
    --
    2.31.1
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