commit 48c072174dea73c4c36ba95df87c1b4d6083df11
author Xin Long <lucien.xin@gmail.com> Mon Jan 28 15:08:28 2019 +0800
committer David S. Miller <davem@davemloft.net> Wed Jan 30 00:44:06 2019 -0800
tree f9a8904a91dfcf0f4c56bd5ef9eb4241d71dca5b
parent 6fd769beb0d9451739acaecebe8266550aafd268

sctp: use SCTP_FUTURE_ASSOC for SCTP_LOCAL_AUTH_CHUNKS sockopt

Check with SCTP_FUTURE_ASSOC instead in
sctp_getsockopt_local_auth_chunks, it's compatible with 0.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/socket.c

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index f38c912..7df2123 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6767,14 +6767,12 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
 
 	to = p->gauth_chunks;
 	asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
-	if (!asoc && val.gauth_assoc_id && sctp_style(sk, UDP))
+	if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
+	    sctp_style(sk, UDP))
 		return -EINVAL;
 
-	if (asoc)
-		ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
-	else
-		ch = ep->auth_chunk_list;
-
+	ch = asoc ? (struct sctp_chunks_param *)asoc->c.auth_chunks
+		  : ep->auth_chunk_list;
 	if (!ch)
 		goto num;