From: Pavel Begunkov <asml.silence@xxxxxxxxx>
commit e276d62dcfdee6582486e8b8344dd869518e14be upstream.
Remove SOCK_SUPPORT_ZC when we're setting ulp as it might not support
msghdr::ubuf_info, e.g. like TLS replacing ->sk_prot with a new set of
handlers.
Cc: <stable@xxxxxxxxxxxxxxx> # 6.0
Reported-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Fixes: e993ffe3da4bc ("net: flag sockets supporting msghdr originated zerocopy")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/tcp_ulp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/ipv4/tcp_ulp.c b/net/ipv4/tcp_ulp.c
index 7c27aa629af1..9ae50b1bd844 100644
--- a/net/ipv4/tcp_ulp.c
+++ b/net/ipv4/tcp_ulp.c
@@ -136,6 +136,9 @@ static int __tcp_set_ulp(struct sock *sk, const struct tcp_ulp_ops *ulp_ops)
if (icsk->icsk_ulp_ops)
goto out_err;
+ if (sk->sk_socket)
+ clear_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags);
+
err = ulp_ops->init(sk);
if (err)
goto out_err;
--
2.38.1
