This is a note to let you know that I've just added the patch titled
udp6: allow SO_MARK ctrl msg to affect routing
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
udp6-allow-so_mark-ctrl-msg-to-affect-routing.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f91aee277f2fac5b640de91ee1819ee5875c6f17
Author: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Fri Oct 29 08:51:34 2021 -0700
udp6: allow SO_MARK ctrl msg to affect routing
[ Upstream commit 42dcfd850e514b229d616a53dec06d0f2533217c ]
Commit c6af0c227a22 ("ip: support SO_MARK cmsg")
added propagation of SO_MARK from cmsg to skb->mark.
For IPv4 and raw sockets the mark also affects route
lookup, but in case of IPv6 the flow info is
initialized before cmsg is parsed.
Fixes: c6af0c227a22 ("ip: support SO_MARK cmsg")
Reported-and-tested-by: Xintong Hu <huxintong@xxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 0f57c682afdd8..818fc99756256 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1363,7 +1363,6 @@ do_udp_sendmsg:
if (!fl6.flowi6_oif)
fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
- fl6.flowi6_mark = ipc6.sockc.mark;
fl6.flowi6_uid = sk->sk_uid;
if (msg->msg_controllen) {
@@ -1399,6 +1398,7 @@ do_udp_sendmsg:
ipc6.opt = opt;
fl6.flowi6_proto = sk->sk_protocol;
+ fl6.flowi6_mark = ipc6.sockc.mark;
fl6.daddr = *daddr;
if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
fl6.saddr = np->saddr;
