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-rw-r--r--include/linux/audit.h4
-rw-r--r--kernel/auditfilter.c10
2 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 36dffec..9333192 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -47,6 +47,7 @@ struct sk_buff;
struct audit_krule {
int vers_ops;
+ u32 pflags;
u32 flags;
u32 listnr;
u32 action;
@@ -64,6 +65,9 @@ struct audit_krule {
u64 prio;
};
+/* Flag to indicate legacy AUDIT_LOGINUID unset usage */
+#define AUDIT_LOGINUID_LEGACY 0x1
+
struct audit_field {
u32 type;
union {
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index c0d148b..103586e 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -442,6 +442,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
f->type = AUDIT_LOGINUID_SET;
f->val = 0;
+ entry->rule.pflags |= AUDIT_LOGINUID_LEGACY;
}
err = audit_field_valid(entry, f);
@@ -617,6 +618,13 @@ static struct audit_rule_data *audit_krule_to_data(struct audit_krule *krule)
data->buflen += data->values[i] =
audit_pack_string(&bufp, krule->filterkey);
break;
+ case AUDIT_LOGINUID_SET:
+ if (krule->pflags & AUDIT_LOGINUID_LEGACY && !f->val) {
+ data->fields[i] = AUDIT_LOGINUID;
+ data->values[i] = AUDIT_UID_UNSET;
+ break;
+ }
+ /* fallthrough if set */
default:
data->values[i] = f->val;
}
@@ -633,6 +641,7 @@ static int audit_compare_rule(struct audit_krule *a, struct audit_krule *b)
int i;
if (a->flags != b->flags ||
+ a->pflags != b->pflags ||
a->listnr != b->listnr ||
a->action != b->action ||
a->field_count != b->field_count)
@@ -751,6 +760,7 @@ struct audit_entry *audit_dupe_rule(struct audit_krule *old)
new = &entry->rule;
new->vers_ops = old->vers_ops;
new->flags = old->flags;
+ new->pflags = old->pflags;
new->listnr = old->listnr;
new->action = old->action;
for (i = 0; i < AUDIT_BITMASK_SIZE; i++)
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