[PATCH 4.9 01/45] net/af_iucv: set correct sk_protocol for child sockets

From: Greg Kroah-Hartman
Date: Thu Dec 10 2020 - 14:40:18 EST


From: Julian Wiedmann <jwi@xxxxxxxxxxxxx>

[ Upstream commit c5dab0941fcdc9664eb0ec0d4d51433216d91336 ]

Child sockets erroneously inherit their parent's sk_type (ie. SOCK_*),
instead of the PF_IUCV protocol that the parent was created with in
iucv_sock_create().

We're currently not using sk->sk_protocol ourselves, so this shouldn't
have much impact (except eg. getting the output in skb_dump() right).

Fixes: eac3731bd04c ("[S390]: Add AF_IUCV socket support")
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201120100657.34407-1-jwi@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/iucv/af_iucv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1753,7 +1753,7 @@ static int iucv_callback_connreq(struct
}

/* Create the new socket */
- nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0);
+ nsk = iucv_sock_alloc(NULL, sk->sk_protocol, GFP_ATOMIC, 0);
if (!nsk) {
err = pr_iucv->path_sever(path, user_data);
iucv_path_free(path);
@@ -1963,7 +1963,7 @@ static int afiucv_hs_callback_syn(struct
goto out;
}

- nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0);
+ nsk = iucv_sock_alloc(NULL, sk->sk_protocol, GFP_ATOMIC, 0);
bh_lock_sock(sk);
if ((sk->sk_state != IUCV_LISTEN) ||
sk_acceptq_is_full(sk) ||