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udp6: allow SO_MARK ctrl msg to affect routing 

[ Upstream commit 42dcfd850e514b229d616a53dec06d0f2533217c ]

Commit c6af0c227a ("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: c6af0c227a ("ip: support SO_MARK cmsg")
Reported-and-tested-by: Xintong Hu <huxintong@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jakub Kicinski 2021-10-29 08:51:34 -07:00 committed by Greg Kroah-Hartman
parent 9ff14503f4
commit a91c8ee2ed
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/udp.c
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@ -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;