sctp: Initialize daddr on peeled off socket

[ Upstream commit 8467dda0c26583547731e7f3ea73fc3856bae3bf ]

Function sctp_do_peeloff() wrongly initializes daddr of the original
socket instead of the peeled off socket, which makes getpeername()
return zeroes instead of the primary address. Initialize the new socket
instead.

Fixes: d570ee490fb1 ("[SCTP]: Correctly set daddr for IPv6 sockets during peeloff")
Signed-off-by: Petr Malat <oss@malat.biz>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Link: https://lore.kernel.org/r/20220409063611.673193-1-oss@malat.biz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 0a9e2c7d8e5f535485f1bc1d319237f0fc06fc1f..e9b4ea3d934fa6ab32b0b0e0a9b3c2bd8b348ed1 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5518,7 +5518,7 @@ int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
         * Set the daddr and initialize id to something more random and also
         * copy over any ip options.
         */
-       sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk);
+       sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk);
        sp->pf->copy_ip_options(sk, sock->sk);
 
        /* Populate the fields of the newsk from the oldsk and migrate the