linux-kernel - [PATCH] audit: deprecate the AUDIT_FILTER

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Message-Id: <0b3961849e1fdcb10b95dd3ca0dc818e8997a8f5.1518002656.git.rgb@redhat.com>
Date:   Wed,  7 Feb 2018 06:24:36 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     linux-audit@...hat.com, linux-kernel@...r.kernel.org
Cc:     Richard Guy Briggs <rgb@...hat.com>,
        Paul Moore <pmoore@...hat.com>,
        Steve Grubb <sgrubb@...hat.com>, Eric Paris <eparis@...hat.com>
Subject: [PATCH] audit: deprecate the AUDIT_FILTER_ENTRY filter

The audit entry filter has been long deprecated with userspace support
finally removed in audit-v2.6.7 and plans to remove kernel support have
existed since kernel-v2.6.31.
Remove it.

Passes audit-testsuite.

See: https://github.com/linux-audit/audit-kernel/issues/6
Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 kernel/auditfilter.c | 4 ++--
 kernel/auditsc.c     | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 4a1758a..1bbf5de 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -258,8 +258,8 @@ static inline struct audit_entry *audit_to_entry_common(struct audit_rule_data *
 		goto exit_err;
 #ifdef CONFIG_AUDITSYSCALL
 	case AUDIT_FILTER_ENTRY:
-		if (rule->action == AUDIT_ALWAYS)
-			goto exit_err;
+		pr_err("AUDIT_FILTER_ENTRY is deprecated\n");
+		goto exit_err;
 	case AUDIT_FILTER_EXIT:
 	case AUDIT_FILTER_TASK:
 #endif
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index e80459f..9348302 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1530,7 +1530,8 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
 	context->dummy = !audit_n_rules;
 	if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
 		context->prio = 0;
-		state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
+		if (auditd_test_task(tsk))
+			return;
 	}
 	if (state == AUDIT_DISABLED)
 		return;
-- 
1.8.3.1