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Ido Schimmel 703acdfa96 ipv4: Fix incorrect TOS in route get reply 
[ Upstream commit 338bb57e4c ]

The TOS value that is returned to user space in the route get reply is
the one with which the lookup was performed ('fl4->flowi4_tos'). This is
fine when the matched route is configured with a TOS as it would not
match if its TOS value did not match the one with which the lookup was
performed.

However, matching on TOS is only performed when the route's TOS is not
zero. It is therefore possible to have the kernel incorrectly return a
non-zero TOS:

 # ip link add name dummy1 up type dummy
 # ip address add 192.0.2.1/24 dev dummy1
 # ip route get 192.0.2.2 tos 0xfc
 192.0.2.2 tos 0x1c dev dummy1 src 192.0.2.1 uid 0
     cache

Fix by adding a DSCP field to the FIB result structure (inside an
existing 4 bytes hole), populating it in the route lookup and using it
when filling the route get reply.

Output after the patch:

 # ip link add name dummy1 up type dummy
 # ip address add 192.0.2.1/24 dev dummy1
 # ip route get 192.0.2.2 tos 0xfc
 192.0.2.2 dev dummy1 src 192.0.2.1 uid 0
     cache

Fixes: 1a00fee4ff ("ipv4: Remove rt_key_{src,dst,tos} from struct rtable.")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-03 08:49:24 +02:00
..
9p net/9p: add 'pooled_rbuffers' flag to struct p9_trans_module 2022-10-05 07:05:41 +09:00
bluetooth Bluetooth: L2CAP: Fix deadlock 2024-07-25 09:49:20 +02:00
caif
iucv
netfilter netfilter: nf_tables: fully validate NFT_DATA_VALUE on store to data registers 2024-07-05 09:31:47 +02:00
netns xfrm: fix a data-race in xfrm_gen_index() 2023-10-25 12:03:06 +02:00
nfc
phonet net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
sctp sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop 2023-03-11 13:55:26 +01:00
tc_act net/sched: transition act_pedit to rcu and percpu stats 2023-03-11 13:55:28 +01:00
6lowpan.h
act_api.h net: sched: act: move global static variable net_id to tc_action_ops 2022-09-09 08:24:41 +01:00
addrconf.h ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr 2024-04-17 11:18:24 +02:00
af_ieee802154.h
af_rxrpc.h rxrpc: Remove rxrpc_get_reply_time() which is no longer used 2022-09-01 11:44:13 +01:00
af_unix.h af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc(). 2024-05-02 16:29:27 +02:00
af_vsock.h vsock: add API call for data ready 2022-08-23 10:43:11 +02:00
ah.h
amt.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
arp.h neighbour: switch to standard rcu, instead of rcu_bh 2023-10-10 22:00:42 +02:00
atmclip.h
ax25.h ax25: Use kernel universal linked list to implement ax25_dev_list 2024-06-12 11:03:20 +02:00
ax88796.h ax88796: Fix some typo in a comment 2022-08-09 22:14:02 -07:00
bareudp.h
bond_3ad.h net: bonding: Share lacpdu_mcast_addr definition 2022-09-16 14:34:01 +01:00
bond_alb.h bonding (gcc13): synchronize bond_{a,t}lb_xmit() types 2023-05-11 23:03:41 +09:00
bond_options.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
bonding.h bonding: fix macvlan over alb bond support 2023-08-30 16:11:04 +02:00
bpf_sk_storage.h
busy_poll.h net: Fix a data-race around sysctl_net_busy_poll. 2022-08-24 13:46:58 +01:00
calipso.h
cfg80211-wext.h
cfg80211.h wifi: cfg80211: fix kernel-doc for wiphy_delayed_work_flush() 2023-11-20 11:52:18 +01:00
cfg802154.h mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:19:31 +02:00
checksum.h
cipso_ipv4.h
cls_cgroup.h
codel.h
codel_impl.h
codel_qdisc.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
compat.h net: copy from user before calling __get_compat_msghdr 2022-07-24 18:39:17 -06:00
datalink.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dcbevent.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dcbnl.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
devlink.h net: devlink: add port_init/fini() helpers to allow pre-register/post-unregister functions 2022-09-30 18:17:16 -07:00
dropreason.h net: skb: export skb drop reaons to user by TRACE_DEFINE_ENUM 2022-09-07 15:28:08 +01:00
dsa.h net: dsa: introduce preferred_default_local_cpu_port and use on MT7530 2024-04-27 17:07:17 +02:00
dsfield.h
dst.h net: add atomic_long_t to net_device_stats fields 2022-12-31 13:33:02 +01:00
dst_cache.h
dst_metadata.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2022-10-03 07:52:13 +01:00
dst_ops.h net: fix __dst_negative_advice() race 2024-06-16 13:41:40 +02:00
erspan.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
esp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
espintcp.h
ethoc.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
failover.h
fib_notifier.h
fib_rules.h
firewire.h firewire: net: Make use of get_unaligned_be48(), put_unaligned_be48() 2022-07-28 22:21:54 -07:00
flow.h inet: shrink struct flowi_common 2023-11-20 11:52:15 +01:00
flow_dissector.h flow_dissector: Add L2TPv3 dissectors 2022-09-20 09:13:38 +02:00
flow_offload.h flow_offload: Introduce flow_match_l2tpv3 2022-09-20 09:13:38 +02:00
fou.h
fq.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
fq_impl.h net/fq_impl: Use the bitmap API to allocate bitmaps 2022-07-11 19:49:38 -07:00
garp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
gen_stats.h
genetlink.h drop_monitor: Require 'CAP_SYS_ADMIN' when joining "events" group 2023-12-13 18:39:12 +01:00
geneve.h
gre.h
gro.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-08-25 16:07:42 -07:00
gro_cells.h
gtp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
gue.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
hwbm.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
icmp.h
ieee80211_radiotap.h
ieee802154_netdev.h net: ieee802154: return -EINVAL for unknown addr type 2022-10-07 08:42:00 +01:00
if_inet6.h net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX 2023-12-20 17:00:15 +01:00
ife.h
ila.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet6_connection_sock.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet6_hashtables.h net: remove duplicate reuseport_lookup functions 2024-06-12 11:03:12 +02:00
inet_common.h inet: factor out locked section of inet_accept() in a new helper 2024-06-12 11:03:53 +02:00
inet_connection_sock.h Fix race for duplicate reqsk on identical SYN 2024-07-05 09:31:46 +02:00
inet_dscp.h
inet_ecn.h
inet_frag.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet_hashtables.h net: remove duplicate reuseport_lookup functions 2024-06-12 11:03:12 +02:00
inet_sock.h udp: fix busy polling 2024-01-31 16:17:04 -08:00
inet_timewait_sock.h tcp: Add TIME_WAIT sockets in bhash2. 2023-01-12 12:02:15 +01:00
inetpeer.h
ioam6.h
ip.h ipmr: fix kernel panic when forwarding mcast packets 2024-02-05 20:13:00 +00:00
ip6_checksum.h
ip6_fib.h ipv6: Remove in6addr_any alternatives. 2023-09-19 12:28:10 +02:00
ip6_route.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ip6_tunnel.h
ip_fib.h ipv4: Fix incorrect TOS in route get reply 2024-08-03 08:49:24 +02:00
ip_tunnels.h geneve: Fix incorrect inner network header offset when innerprotoinherit is set 2024-06-21 14:35:51 +02:00
ip_vs.h ipvs: Update width of source for ip_vs_sync_conn_options 2023-05-24 17:32:39 +01:00
ipcomp.h xfrm: ipcomp: add extack to ipcomp{4,6}_init_state 2022-09-29 07:18:00 +02:00
ipconfig.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ipv6.h tcp: Fix bind() regression for v4-mapped-v6 wildcard address. 2023-09-19 12:28:10 +02:00
ipv6_frag.h
ipv6_stubs.h bpf: Derive source IP addr via bpf_*_fib_lookup() 2024-03-06 14:45:20 +00:00
iw_handler.h
kcm.h
l3mdev.h
lag.h
lapb.h
lib80211.h
llc.h
llc_c_ac.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_c_ev.h
llc_c_st.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_conn.h
llc_if.h
llc_pdu.h llc: Drop support for ETH_P_TR_802_2. 2024-01-31 16:17:04 -08:00
llc_s_ac.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_s_ev.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_s_st.h add missing includes and forward declarations to networking includes under linux/ 2022-07-28 11:29:36 +02:00
llc_sap.h
lwtunnel.h lwt: Check LWTUNNEL_XMIT_CONTINUE strictly 2023-09-13 09:42:33 +02:00
mac80211.h wifi: mac80211: don't use rate mask for scanning 2024-06-12 11:02:58 +02:00
mac802154.h
macsec.h macsec: Enable devices to advertise whether they update sk_buff md_dst during offloads 2024-05-02 16:29:32 +02:00
mctp.h net: mctp: take ownership of skb in mctp_local_output 2024-03-06 14:45:06 +00:00
mctpdevice.h
mip6.h
mld.h
mpls.h
mpls_iptunnel.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
mptcp.h mptcp: remove MPTCP 'ifdef' in TCP SYN cookies 2023-01-07 11:11:44 +01:00
mrp.h mrp: introduce active flags to prevent UAF when applicant uninit 2022-12-31 13:33:02 +01:00
ncsi.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ndisc.h neighbour: switch to standard rcu, instead of rcu_bh 2023-10-10 22:00:42 +02:00
neighbour.h neighbour: fix data-races around n->output 2023-10-10 22:00:42 +02:00
net_debug.h
net_failover.h
net_namespace.h netfilter: nf_flow_table: count pending offload workqueue tasks 2022-07-11 16:25:14 +02:00
net_ratelimit.h
net_trackers.h
netevent.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
netlabel.h
netlink.h netlink: split up copies in the ack construction 2023-10-10 22:00:44 +02:00
netprio_cgroup.h
netrom.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
nexthop.h ipv6: remove nexthop_fib6_nh_bh() 2023-10-10 22:00:46 +02:00
nl802154.h net: ieee802154: Fix compilation error when CONFIG_IEEE802154_NL802154_EXPERIMENTAL is disabled 2022-09-02 19:59:08 -07:00
nsh.h
p8022.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
page_pool.h page_pool: fix inconsistency for page_pool_ring_[un]lock() 2023-06-05 09:26:20 +02:00
pie.h
ping.h net/ipv4: ping_group_range: allow GID from 2147483648 to 4294967294 2023-06-14 11:15:16 +02:00
pkt_cls.h net: sched: cls_api: introduce tc_cls_bind_class() helper 2022-10-02 16:07:17 +01:00
pkt_sched.h net/sched: make psched_mtu() RTNL-less safe 2023-07-23 13:49:27 +02:00
pptp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
protocol.h tcp/udp: Make early_demux back namespacified. 2022-07-15 18:50:35 -07:00
psample.h
psnap.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
raw.h raw: Fix NULL deref in raw_get_next(). 2023-04-13 16:55:23 +02:00
rawv6.h raw: convert raw sockets to RCU 2022-06-19 10:00:02 +01:00
red.h treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
regulatory.h wifi: cfg80211: fix regulatory disconnect with OCB/NAN 2023-07-19 16:21:10 +02:00
request_sock.h
rose.h net: rose: add netdev ref tracker to 'struct rose_sock' 2022-08-01 11:59:23 -07:00
route.h net: annotate data-races around sk->sk_mark 2023-08-11 12:08:14 +02:00
rpl.h ipv6: rpl: Fix Route of Death. 2023-06-14 11:15:20 +02:00
rsi_91x.h
rtnetlink.h net: validate veth and vxcan peer ifindexes 2023-08-30 16:11:02 +02:00
rtnh.h
sch_generic.h net/sched: fix false lockdep warning on qdisc root lock 2024-06-27 13:46:15 +02:00
scm.h scm: fix MSG_CTRUNC setting condition for SO_PASSSEC 2023-05-11 23:03:18 +09:00
secure_seq.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
seg6.h
seg6_hmac.h
seg6_local.h
selftests.h
slhc_vj.h
smc.h net/smc: Pass on DMBE bit mask in IRQ handler 2022-07-27 13:24:42 +01:00
snmp.h
sock.h net: fix __dst_negative_advice() race 2024-06-16 13:41:40 +02:00
sock_reuseport.h soreuseport: Fix socket selection for SO_INCOMING_CPU. 2022-12-31 13:32:04 +01:00
Space.h
stp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
strparser.h tls: rx: remove the message decrypted tracking 2022-07-18 11:24:10 +01:00
switchdev.h net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:26:35 +01:00
tcp.h tcp: add tcp_done_with_error() helper 2024-08-03 08:49:04 +02:00
tcp_states.h
timewait_sock.h
tipc.h
tls.h tls: fix race between async notify and socket close 2024-02-23 09:12:31 +01:00
tls_toe.h
transp_v6.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
tso.h
tun_proto.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
udp.h ipv4, ipv6: Use splice_eof() to flush 2024-01-10 17:10:27 +01:00
udp_tunnel.h udp: lockless UDP_ENCAP_L2TPINUDP / UDP_GRO 2024-01-10 17:10:28 +01:00
udplite.h tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct(). 2022-10-12 17:50:37 -07:00
vsock_addr.h
vxlan.h vxlan: Fix nexthop hash size 2023-08-11 12:08:17 +02:00
wext.h
x25.h
x25device.h
xdp.h xdp: Adjust xdp_frame layout to avoid using bitfields 2022-09-26 13:28:19 -07:00
xdp_priv.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
xdp_sock.h
xdp_sock_drv.h xsk: Remove unused xsk_buff_discard 2022-09-30 07:55:46 -07:00
xfrm.h xfrm: Preserve vlan tags for transport mode software GRO 2024-05-17 11:56:10 +02:00
xsk_buff_pool.h xsk: Fix unaligned descriptor validation 2023-05-11 23:03:21 +09:00