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audit: deprecate the AUDIT_FILTER_ENTRY filter

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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.

Since removing the audit entry filter, test for early return before
setting up any context state.

Passes audit-testsuite.

See: https://github.com/linux-audit/audit-kernel/issues/6

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Guy Briggs 2018-02-14 21:47:43 -05:00 committed by Paul Moore
parent 6387440e15
commit 5260ecc2e0
2 changed files with 13 additions and 12 deletions
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4
kernel/auditfilter.c
View File

@ -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

21
kernel/auditsc.c
View File

@ -1519,22 +1519,23 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
if (!audit_enabled)
return;
state = context->state;
if (state == AUDIT_DISABLED)
return;
context->dummy = !audit_n_rules;
if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
context->prio = 0;
if (auditd_test_task(tsk))
return;
}
context->arch = syscall_get_arch();
context->major = major;
context->argv[0] = a1;
context->argv[1] = a2;
context->argv[2] = a3;
context->argv[3] = a4;
state = context->state;
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 (state == AUDIT_DISABLED)
return;
context->serial = 0;
context->ctime = current_kernel_time64();
context->in_syscall = 1;