kernel_samsung_a53x/net
Benoît Monin 4454492a69 net: skip offload for NETIF_F_IPV6_CSUM if ipv6 header contains extension
[ Upstream commit 04c20a9356f283da623903e81e7c6d5df7e4dc3c ]

As documented in skbuff.h, devices with NETIF_F_IPV6_CSUM capability
can only checksum TCP and UDP over IPv6 if the IP header does not
contains extension.

This is enforced for UDP packets emitted from user-space to an IPv6
address as they go through ip6_make_skb(), which calls
__ip6_append_data() where a check is done on the header size before
setting CHECKSUM_PARTIAL.

But the introduction of UDP encapsulation with fou6 added a code-path
where it is possible to get an skb with a partial UDP checksum and an
IPv6 header with extension:
* fou6 adds a UDP header with a partial checksum if the inner packet
does not contains a valid checksum.
* ip6_tunnel adds an IPv6 header with a destination option extension
header if encap_limit is non-zero (the default value is 4).

The thread linked below describes in more details how to reproduce the
problem with GRE-in-UDP tunnel.

Add a check on the network header size in skb_csum_hwoffload_help() to
make sure no IPv6 packet with extension header is handed to a network
device with NETIF_F_IPV6_CSUM capability.

Link: https://lore.kernel.org/netdev/26548921.1r3eYUQgxm@benoit.monin/T/#u
Fixes: aa3463d65e7b ("fou: Add encap ops for IPv6 tunnels")
Signed-off-by: Benoît Monin <benoit.monin@gmx.fr>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/5fbeecfc311ea182aa1d1c771725ab8b4cac515e.1729778144.git.benoit.monin@gmx.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-23 23:22:04 +01:00
..
6lowpan
9p
802
8021q gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2024-11-23 23:21:04 +01:00
appletalk
atm
ax25
batman-adv batman-adv: fix random jitter calculation 2024-11-19 17:55:48 +01:00
bluetooth Bluetooth: bnep: fix wild-memory-access in proto_unregister 2024-11-23 23:21:59 +01:00
bpf
bpfilter
bridge netfilter: br_netfilter: fix panic with metadata_dst skb 2024-11-23 23:21:51 +01:00
caif
can can: bcm: Clear bo->bcm_proc_read after remove_proc_entry(). 2024-11-23 23:21:18 +01:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-11-19 14:19:45 +01:00
core net: skip offload for NETIF_F_IPV6_CSUM if ipv6 header contains extension 2024-11-23 23:22:04 +01:00
dcb
dccp
decnet
dns_resolver
dsa
ethernet gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2024-11-23 23:21:04 +01:00
ethtool ethtool: check device is present when getting link settings 2024-11-23 23:20:55 +01:00
hsr
ieee802154
ife
ipv4 xfrm: respect ip protocols rules criteria when performing dst lookups 2024-11-23 23:22:00 +01:00
ipv6 xfrm: respect ip protocols rules criteria when performing dst lookups 2024-11-23 23:22:00 +01:00
iucv s390/iucv: fix receive buffer virtual vs physical address confusion 2024-11-23 23:20:47 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-11-23 23:20:48 +01:00
key
l2tp genetlink: hold RCU in genlmsg_mcast() 2024-11-23 23:21:59 +01:00
l3mdev net: Add l3mdev index to flow struct and avoid oif reset for port devices 2024-11-23 23:21:52 +01:00
lapb
llc
mac80211 mac80211: Add support to trigger sta disconnect on hardware restart 2024-11-23 23:22:03 +01:00
mac802154 Revert "net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD()" 2024-11-19 14:52:14 +01:00
mpls
mptcp mptcp: handle consistently DSS corruption 2024-11-23 23:21:57 +01:00
ncm
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-11-19 14:19:00 +01:00
netfilter netfilter: ctnetlink: compile ctnetlink_label_size with CONFIG_NF_CONNTRACK_EVENTS 2024-11-23 23:21:28 +01:00
netlabel
netlink genetlink: hold RCU in genlmsg_mcast() 2024-11-23 23:21:59 +01:00
netrom netrom: Fix a memory leak in nr_heartbeat_expiry() 2024-11-19 14:19:08 +01:00
nfc
nsh
openvswitch
packet af_packet: Handle outgoing VLAN packets without hardware offloading 2024-11-23 23:20:12 +01:00
phonet
psample
qrtr net: qrtr: Update packets cloning when broadcasting 2024-11-23 23:21:28 +01:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-11-23 23:20:54 +01:00
rfkill
rose
rxrpc
sched net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT 2024-11-23 23:22:03 +01:00
sctp sctp: ensure sk_state is set to CLOSED if hashing fails in sctp_listen_start 2024-11-23 23:21:52 +01:00
skb_tracer
smc net/smc: Fix searching in list of known pnetids in smc_pnet_add_pnetid 2024-11-23 23:21:59 +01:00
strparser
sunrpc net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket 2024-11-23 23:21:09 +01:00
switchdev
tipc tipc: guard against string buffer overrun 2024-11-23 23:21:38 +01:00
tls
unix af_unix: Remove put_pid()/put_cred() in copy_peercred(). 2024-11-23 23:21:03 +01:00
vmw_vsock
wimax
wireless genetlink: hold RCU in genlmsg_mcast() 2024-11-23 23:21:59 +01:00
x25
xdp
xfrm xfrm: validate new SA's prefixlen using SA family when sel.family is unset 2024-11-23 23:22:02 +01:00
compat.c
devres.c
Kconfig
Makefile
socket.c
sysctl_net.c
TEST_MAPPING