1 files changed, 5 insertions, 0 deletions

diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index b622d9744856..1ca3b26eed0f 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -474,6 +474,11 @@ static int dccp_setsockopt_change(struct sock *sk, int type,
 
         if (copy_from_user(&opt, optval, sizeof(opt)))
                 return -EFAULT;
+        /*
+         * rfc4340: 6.1. Change Options
+         */
+        if (opt.dccpsf_len < 1)
+                return -EINVAL;
 
         val = kmalloc(opt.dccpsf_len, GFP_KERNEL);
         if (!val)