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-rw-r--r--net/dccp/options.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c
index f06ffcfc8d7..4b2ab657ac8 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -123,6 +123,8 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
case DCCPO_CHANGE_L ... DCCPO_CONFIRM_R:
if (pkt_type == DCCP_PKT_DATA) /* RFC 4340, 6 */
break;
+ if (len == 0)
+ goto out_invalid_option;
rc = dccp_feat_parse_options(sk, dreq, mandatory, opt,
*value, value + 1, len - 1);
if (rc)