[PATCH 3/4] Add the checking of exclude filter list for the field which is not AUDIT_MSGTYPE

[zhangxiliang]

Hello Steve, 

When field is not AUDIT_MSGTYPE, it is invalid for exclude filter list.
I think the fields shoud be check before sending to kernel.
I add checking and error message "-18" to realize it.

Signed-off-by: Zhang Xiliang <zhangxiliang at cn.fujitsu.com>
---
 lib/deprecated.c |    3 +++
 lib/libaudit.c   |    3 +++
 src/auditctl.c   |    5 +++++
 3 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/lib/deprecated.c b/lib/deprecated.c
index 695e5d6..e7047df 100644
--- a/lib/deprecated.c
+++ b/lib/deprecated.c
@@ -440,6 +440,9 @@ int audit_rule_fieldpair(struct audit_rule *rule, const char *pair, int flags)
 			if (field == AUDIT_PPID && (flags != AUDIT_FILTER_EXIT
 				|| flags != AUDIT_FILTER_ENTRY))
 				return -17;
+			
+			if (flags == AUDIT_FILTER_EXCLUDE)
+				return -18;
 
 			rule->values[rule->field_count] = strtol(v, NULL, 0);
 			break;
diff --git a/lib/libaudit.c b/lib/libaudit.c
index 5b276f1..4d20261 100644
--- a/lib/libaudit.c
+++ b/lib/libaudit.c
@@ -1085,6 +1085,9 @@ int audit_rule_fieldpair_data(struct audit_rule_data **rulep, const char *pair,
 			if (field == AUDIT_PPID && (flags != AUDIT_FILTER_EXIT 
 				|| flags != AUDIT_FILTER_ENTRY))
 				return -17;
+			
+			if (flags == AUDIT_FILTER_EXCLUDE)
+				return -18;
 
 			rule->values[rule->field_count] = strtol(v, NULL, 0);
 			break;
diff --git a/src/auditctl.c b/src/auditctl.c
index 2e64d28..0d38ac1 100644
--- a/src/auditctl.c
+++ b/src/auditctl.c
@@ -794,6 +794,11 @@ static int setopt(int count, char *vars[])
 					"Field %s can only be used with exit and entry filter list\n", optarg);
 				retval = -1;
 				break;
+			case -18:
+				fprintf(stderr,
+					"Field %s can not be used with exclude filter list\n", optarg);
+				retval = -1;
+				break;
 			default:
 				retval = -1;
 				break;

-- 
Regards
Zhang Xiliang