The patch below does not apply to the 6.0-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
Possible dependencies:
8f279fb00bb2 ("udp: advertise ipv6 udp support for msghdr::ubuf_info")
d38afeec26ed ("tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().")
21985f43376c ("udp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 8f279fb00bb29def9ac79e28c5d6d8e07d21f3fb Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date: Thu, 27 Oct 2022 00:25:56 +0100
Subject: [PATCH] udp: advertise ipv6 udp support for msghdr::ubuf_info
Mark udp ipv6 as supporting msghdr::ubuf_info. In the original commit
SOCK_SUPPORT_ZC was supposed to be set by a udp_init_sock() call from
udp6_init_sock(), but
d38afeec26ed4 ("tcp/udp: Call inet6_destroy_sock() in IPv6 ...")
removed it and so ipv6 udp misses the flag.
Cc: <stable@xxxxxxxxxxxxxxx> # 6.0
Fixes: e993ffe3da4bc ("net: flag sockets supporting msghdr originated zerocopy")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 129ec5a9b0eb..bc65e5b7195b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -66,6 +66,7 @@ int udpv6_init_sock(struct sock *sk)
{
skb_queue_head_init(&udp_sk(sk)->reader_queue);
sk->sk_destruct = udpv6_destruct_sock;
+ set_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags);
return 0;
}
