[userspace PATCH v2 2/2] Check exclude filter cred extension fields available in kernel

[Richard Guy Briggs <rgb@redhat.com>]

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
 trunk/lib/errormsg.h |    2 +-
 trunk/lib/libaudit.c |   39 ++++++++++++++++++++++-----------------
 trunk/lib/libaudit.h |    3 +++
 3 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/trunk/lib/errormsg.h b/trunk/lib/errormsg.h
index 84bfdb3..4a897be 100644
--- a/trunk/lib/errormsg.h
+++ b/trunk/lib/errormsg.h
@@ -47,7 +47,7 @@ static const struct msg_tab err_msgtab[] = {
     { -9,    0,    "msgtype field can only be used with exclude filter list" },
     { -10,    0,    "Failed upgrading rule" },
     { -11,    0,    "String value too long" },
-    { -12,    0,    "Only msgtype field can be used with exclude filter" },
+    { -12,    0,    "Only msgtype, uid, gid, auid*, subj* fields can be used with exclude filter" },
     { -13,    1,    "only takes = or != operators" },
     { -14,    0,    "Permission can only contain  \'rwxa\'" },
     { -15,    2,    "-F unknown errno -"},
diff --git a/trunk/lib/libaudit.c b/trunk/lib/libaudit.c
index 798b3c8..5ffc38c 100644
--- a/trunk/lib/libaudit.c
+++ b/trunk/lib/libaudit.c
@@ -1401,23 +1401,28 @@ int audit_rule_fieldpair_data(struct audit_rule_data **rulep, const char *pair,
 		return -2;
 
 	/* Exclude filter can be used only with MSGTYPE and cred fields */
-	if (flags == AUDIT_FILTER_EXCLUDE)
-		switch(field) {
-			case AUDIT_PID:
-			case AUDIT_UID:
-			case AUDIT_GID:
-			case AUDIT_LOGINUID:
-			case AUDIT_LOGINUID_SET:
-			case AUDIT_MSGTYPE:
-			case AUDIT_SUBJ_USER:
-			case AUDIT_SUBJ_ROLE:
-			case AUDIT_SUBJ_TYPE:
-			case AUDIT_SUBJ_SEN:
-			case AUDIT_SUBJ_CLR:
-				break;
-			default:
-				return -12;
-		}
+	if (flags == AUDIT_FILTER_EXCLUDE) {
+		if ((features & AUDIT_FEATURE_BITMAP_EXCLUDE_EXTEND) == 0) {
+			if (field != AUDIT_MSGTYPE)
+				return -30;
+		} else
+			switch(field) {
+				case AUDIT_PID:
+				case AUDIT_UID:
+				case AUDIT_GID:
+				case AUDIT_LOGINUID:
+				case AUDIT_LOGINUID_SET:
+				case AUDIT_MSGTYPE:
+				case AUDIT_SUBJ_USER:
+				case AUDIT_SUBJ_ROLE:
+				case AUDIT_SUBJ_TYPE:
+				case AUDIT_SUBJ_SEN:
+				case AUDIT_SUBJ_CLR:
+					break;
+				default:
+					return -12;
+			}
+	}
 
 	rule->fields[rule->field_count] = field;
 	rule->fieldflags[rule->field_count] = op;
diff --git a/trunk/lib/libaudit.h b/trunk/lib/libaudit.h
index 0852bcc..f77691f 100644
--- a/trunk/lib/libaudit.h
+++ b/trunk/lib/libaudit.h
@@ -278,6 +278,9 @@ extern "C" {
 #ifndef AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH
 #define AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH    0x00000004
 #endif
+#ifndef AUDIT_FEATURE_BITMAP_EXCLUDE_EXTEND
+#define AUDIT_FEATURE_BITMAP_EXCLUDE_EXTEND	0x00000008
+#endif
 
 /* Defines for interfield comparison update */
 #ifndef AUDIT_OBJ_UID
-- 
1.7.1