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Petr Machata 94927ae3d5 net: ipv6: ip6mr: Fix in/out netdev to pass to the FORWARD chain 
[ Upstream commit 3365afd3ab ]

The netfilter hook is invoked with skb->dev for input netdevice, and
vif_dev for output netdevice. However at the point of invocation, skb->dev
is already set to vif_dev, and MR-forwarded packets are reported with
in=out:

 # ip6tables -A FORWARD -j LOG --log-prefix '[forw]'
 # cd tools/testing/selftests/net/forwarding
 # ./router_multicast.sh
 # dmesg | fgrep '[forw]'
 [ 1670.248245] [forw]IN=v5 OUT=v5 [...]

For reference, IPv4 MR code shows in and out as appropriate.
Fix by caching skb->dev and using the updated value for output netdev.

Fixes: 7bc570c8b4 ("[IPV6] MROUTE: Support multicast forwarding.")
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/3141ae8386fbe13fef4b793faa75e6bae58d798a.1750113335.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-08-15 12:13:39 +02:00
..
6lowpan ipv6: eliminate ndisc_ops_is_useropt() 2024-08-12 17:23:57 -07:00
9p 9p/trans_fd: mark concurrent read and writes to p9_conn->err 2025-05-02 07:59:20 +02:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:40:37 +01:00
8021q net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime 2025-07-24 08:56:34 +02:00
appletalk net: appletalk: Fix use-after-free in AARP proxy probe 2025-08-01 09:48:41 +01:00
atm atm: clip: Fix NULL pointer dereference in vcc_sendmsg() 2025-07-17 18:37:06 +02:00
ax25 ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt 2025-02-21 14:01:16 +01:00
batman-adv batman-adv: Ignore own maximum aggregation size during RX 2025-03-28 22:03:31 +01:00
bluetooth Bluetooth: L2CAP: Fix attempting to adjust outgoing MTU 2025-07-24 08:56:34 +02:00
bpf bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() 2025-02-27 04:30:18 -08:00
bridge net: bridge: Do not offload IGMP/MLD messages 2025-07-24 08:56:35 +02:00
caif move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
can can: bcm: add missing rcu read protection for procfs content 2025-05-29 11:03:19 +02:00
ceph ceph: allocate sparse_ext map only for sparse reads 2025-01-02 10:34:09 +01:00
core bpf, sockmap: Fix psock incorrectly pointing to sk 2025-08-15 12:13:39 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp dccp: Fix memory leak in dccp_feat_change_recv 2024-12-14 20:03:05 +01:00
devlink devlink: fix xa_alloc_cyclic() error handling 2025-03-28 22:03:27 +01:00
dns_resolver Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
dsa net: dsa: tag_brcm: legacy: fix pskb_may_pull length 2025-06-19 15:32:16 +02:00
ethernet netkit: Fix pkt_type override upon netkit pass verdict 2024-05-25 10:48:57 -07:00
ethtool ethtool: cmis_cdb: use correct rpl size in ethtool_cmis_module_poll() 2025-04-25 10:47:43 +02:00
handshake net/handshake: use sockfd_put() helper 2024-08-27 16:09:25 -07:00
hsr net: hsr: Fix PRP duplicate detection 2025-05-29 11:02:20 +02:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 20:03:47 +01:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 xfrm: Set transport header to fix UDP GRO handling 2025-08-01 09:48:40 +01:00
ipv6 net: ipv6: ip6mr: Fix in/out netdev to pass to the FORWARD chain 2025-08-15 12:13:39 +02:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-05 14:02:31 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-19 18:36:12 -07:00
key xfrm: Add support for per cpu xfrm state handling. 2025-02-08 09:58:00 +01:00
l2tp ipv6: replace ipcm6_init calls with ipcm6_init_sk 2025-06-27 11:11:41 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: fix data loss when reading from a socket in llc_ui_recvmsg() 2025-05-29 11:03:20 +02:00
mac80211 wifi: mac80211: fix non-transmitted BSSID profile search 2025-07-17 18:37:17 +02:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:22:54 +01:00
mctp net: mctp: Ensure keys maintain only one ref to corresponding dev 2025-05-22 14:29:40 +02:00
mpls mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). 2025-06-27 11:11:43 +01:00
mptcp mptcp: reset fallback status gracefully at disconnect() time 2025-07-24 08:56:24 +02:00
ncsi net: ncsi: Fix GCPS 64-bit member variables 2025-06-19 15:31:42 +02:00
netfilter netfilter: nf_conntrack: fix crash due to removal of uninitialised entry 2025-07-24 08:56:33 +02:00
netlabel calipso: unlock rcu before returning -EAFNOSUPPORT 2025-06-19 15:32:37 +02:00
netlink netlink: make sure we allow at least one dump skb 2025-07-17 18:37:15 +02:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:33:38 +01:00
nfc NFC: nci: uart: Set tty->disc_data only in success path 2025-06-27 11:11:21 +01:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-04-26 12:20:01 +02:00
openvswitch net: openvswitch: Fix the dead loop of MPLS parse 2025-06-19 15:31:55 +02:00
packet af_packet: fix soft lockup issue caused by tpacket_snd() 2025-07-24 08:56:25 +02:00
phonet phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() 2025-07-24 08:56:24 +02:00
psample psample: adjust size if rate_as_probability is set 2024-12-27 14:02:06 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-09-24 10:48:16 +02:00
rds rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current->nsproxy 2025-01-17 13:40:47 +01:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-05 14:01:57 +01:00
rose rose: fix dangling neighbour pointers in rose_rt_device_down() 2025-07-10 16:04:53 +02:00
rxrpc rxrpc: Fix transmission of an abort in response to an abort 2025-07-24 08:56:35 +02:00
sched net/sched: sch_qfq: Avoid triggering might_sleep in atomic context in qfq_delete_class 2025-08-01 09:48:41 +01:00
sctp sctp: Do not wake readers in __sctp_write_space() 2025-06-27 11:11:29 +01:00
smc smc: Fix various oops due to inet_sock type confusion. 2025-07-24 08:56:31 +02:00
strparser strparser: Add read_sock callback 2025-02-27 04:30:19 -08:00
sunrpc add a string-to-qstr constructor 2025-07-10 16:05:08 +02:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-22 12:54:12 -07:00
tipc tipc: Fix use-after-free in tipc_conn_close(). 2025-07-17 18:37:05 +02:00
tls bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls 2025-08-15 12:13:39 +02:00
unix af_unix: Don't set -ECONNRESET for consumed OOB skb. 2025-07-06 11:01:40 +02:00
vmw_vsock vsock: Fix IOCTL_VM_SOCKETS_GET_LOCAL_CID to check also transport_local 2025-07-17 18:37:05 +02:00
wireless wifi: cfg80211: fix S1G beacon head validation in nl80211 2025-07-17 18:37:16 +02:00
x25 net: change proto and proto_ops accept type 2024-05-13 18:19:09 -06:00
xdp xsk: Fix race condition in AF_XDP generic RX path 2025-05-09 09:50:38 +02:00
xfrm xfrm: interface: fix use-after-free after changing collect_md xfrm interface 2025-08-01 09:48:41 +01:00
compat.c file: stop exposing receive_fd_user() 2023-12-12 14:24:14 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig memory-provider: disable building dmabuf mp on !CONFIG_PAGE_POOL 2024-09-13 11:41:45 -07:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile af_unix: Remove CONFIG_UNIX_SCM. 2024-01-31 16:41:16 -08:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-07 16:21:59 -07:00
sysctl_net.c sysctl: Remove check for sentinel element in ctl_table arrays 2024-06-13 10:50:52 +02:00