LIST_HEAD_INIT(audit_filter_list[4]),
LIST_HEAD_INIT(audit_filter_list[5]),
LIST_HEAD_INIT(audit_filter_list[6]),
-#if AUDIT_NR_FILTERS != 7
+ LIST_HEAD_INIT(audit_filter_list[7]),
+#if AUDIT_NR_FILTERS != 8
#error Fix audit_filter_list initialiser
#endif
};
LIST_HEAD_INIT(audit_rules_list[4]),
LIST_HEAD_INIT(audit_rules_list[5]),
LIST_HEAD_INIT(audit_rules_list[6]),
+ LIST_HEAD_INIT(audit_rules_list[7]),
};
DEFINE_MUTEX(audit_filter_mutex);
static inline int audit_to_inode(struct audit_krule *krule,
struct audit_field *f)
{
- if (krule->listnr != AUDIT_FILTER_EXIT ||
+ if ((krule->listnr != AUDIT_FILTER_EXIT &&
+ krule->listnr != AUDIT_FILTER_URING_EXIT) ||
krule->inode_f || krule->watch || krule->tree ||
(f->op != Audit_equal && f->op != Audit_not_equal))
return -EINVAL;
pr_err("AUDIT_FILTER_ENTRY is deprecated\n");
goto exit_err;
case AUDIT_FILTER_EXIT:
+ case AUDIT_FILTER_URING_EXIT:
case AUDIT_FILTER_TASK:
#endif
case AUDIT_FILTER_USER:
if (entry->rule.listnr != AUDIT_FILTER_FS)
return -EINVAL;
break;
+ case AUDIT_PERM:
+ if (entry->rule.listnr == AUDIT_FILTER_URING_EXIT)
+ return -EINVAL;
+ break;
}
switch (entry->rule.listnr) {
}
entry->rule.prio = ~0ULL;
- if (entry->rule.listnr == AUDIT_FILTER_EXIT) {
+ if (entry->rule.listnr == AUDIT_FILTER_EXIT ||
+ entry->rule.listnr == AUDIT_FILTER_URING_EXIT) {
if (entry->rule.flags & AUDIT_FILTER_PREPEND)
entry->rule.prio = ++prio_high;
else
return rule->mask[word] & bit;
}
+/**
+ * audit_filter_uring - apply filters to an io_uring operation
+ * @tsk: associated task
+ * @ctx: audit context
+ */
+static void audit_filter_uring(struct task_struct *tsk,
+ struct audit_context *ctx)
+{
+ struct audit_entry *e;
+ enum audit_state state;
+
+ if (auditd_test_task(tsk))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_URING_EXIT],
+ list) {
+ if (audit_in_mask(&e->rule, ctx->uring_op) &&
+ audit_filter_rules(tsk, &e->rule, ctx, NULL, &state,
+ false)) {
+ rcu_read_unlock();
+ ctx->current_state = state;
+ return;
+ }
+ }
+ rcu_read_unlock();
+}
+
/* At syscall exit time, this filter is called if the audit_state is
* not low enough that auditing cannot take place, but is also not
* high enough that we already know we have to write an audit record
* __audit_free - free a per-task audit context
* @tsk: task whose audit context block to free
*
- * Called from copy_process and do_exit
+ * Called from copy_process, do_exit, and the io_uring code
*/
void __audit_free(struct task_struct *tsk)
{
* random task_struct that doesn't doesn't have any meaningful data we
* need to log via audit_log_exit().
*/
- if (tsk == current && !context->dummy &&
- context->context == AUDIT_CTX_SYSCALL) {
+ if (tsk == current && !context->dummy) {
context->return_valid = AUDITSC_INVALID;
context->return_code = 0;
-
- audit_filter_syscall(tsk, context);
- audit_filter_inodes(tsk, context);
- if (context->current_state == AUDIT_STATE_RECORD)
- audit_log_exit();
+ if (context->context == AUDIT_CTX_SYSCALL) {
+ audit_filter_syscall(tsk, context);
+ audit_filter_inodes(tsk, context);
+ if (context->current_state == AUDIT_STATE_RECORD)
+ audit_log_exit();
+ } else if (context->context == AUDIT_CTX_URING) {
+ /* TODO: verify this case is real and valid */
+ audit_filter_uring(tsk, context);
+ audit_filter_inodes(tsk, context);
+ if (context->current_state == AUDIT_STATE_RECORD)
+ audit_log_uring(context);
+ }
}
audit_set_context(tsk, NULL);
{
struct audit_context *ctx = audit_context();
- /*
- * TODO: At some point we will likely want to filter on io_uring ops
- * and other things similar to what we do for syscalls, but that
- * is something for another day; just record what we can here.
- */
-
if (ctx->context == AUDIT_CTX_SYSCALL) {
/*
* NOTE: See the note in __audit_uring_entry() about the case
* the behavior here.
*/
audit_filter_syscall(current, ctx);
+ if (ctx->current_state != AUDIT_STATE_RECORD)
+ audit_filter_uring(current, ctx);
audit_filter_inodes(current, ctx);
if (ctx->current_state != AUDIT_STATE_RECORD)
return;
if (!list_empty(&ctx->killed_trees))
audit_kill_trees(ctx);
+ /* run through both filters to ensure we set the filterkey properly */
+ audit_filter_uring(current, ctx);
audit_filter_inodes(current, ctx);
if (ctx->current_state != AUDIT_STATE_RECORD)
goto out;