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-rw-r--r--src/expr.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/expr.c b/src/expr.c
index 74d211b..4e32189 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -74,6 +74,13 @@ int nftnl_expr_set(struct nftnl_expr *expr, uint16_t type,
if (type < NFTNL_EXPR_BASE || type > expr->ops->nftnl_max_attr)
return -1;
+ if (!expr->ops->attr_policy)
+ return -1;
+
+ if (expr->ops->attr_policy[type].maxlen &&
+ expr->ops->attr_policy[type].maxlen < data_len)
+ return -1;
+
if (expr->ops->set(expr, type, data, data_len) < 0)
return -1;
}