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Paolo Abeni 5c2c3c38be net: gro: fix outer network offset 
The udp GRO complete stage assumes that all the packets inserted the RX
have the `encapsulation` flag zeroed. Such assumption is not true, as a
few H/W NICs can set such flag when H/W offloading the checksum for
an UDP encapsulated traffic, the tun driver can inject GSO packets with
UDP encapsulation and the problematic layout can also be created via
a veth based setup.

Due to the above, in the problematic scenarios, udp4_gro_complete() uses
the wrong network offset (inner instead of outer) to compute the outer
UDP header pseudo checksum, leading to csum validation errors later on
in packet processing.

Address the issue always clearing the encapsulation flag at GRO completion
time. Such flag will be set again as needed for encapsulated packets by
udp_gro_complete().

Fixes: 5ef31ea5d0 ("net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb")
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/562638dbebb3b15424220e26a180274b387e2a88.1770032084.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-03 19:23:41 -08:00
..
6lowpan net: replace ND_PRINTK with dynamic debug 2025-07-10 15:27:32 -07:00
9p - fix a bug with O_APPEND in cached mode causing data to be written multiple times on server 2025-12-07 08:29:09 -08:00
802 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
8021q net: vlan: sync VLAN features with lower device 2025-10-31 17:42:35 -07:00
appletalk net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-11-27 12:19:08 -08:00
ax25 net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-10-31 06:46:03 -07:00
bluetooth Bluetooth: MGMT: Fix memory leak in set_ssp_complete 2026-01-22 13:26:53 -05:00
bpf bpf: Fix reference count leak in bpf_prog_test_run_xdp() 2026-01-12 16:37:40 -08:00
bridge net: bridge: fix static key check 2026-01-28 19:34:01 -08:00
caif caif: fix integer underflow in cffrml_receive() 2025-12-11 01:35:41 -08:00
can net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts 2026-01-15 09:52:39 +01:00
ceph libceph: make calc_target() set t->paused, not just clear it 2026-01-06 00:39:43 +01:00
core net: gro: fix outer network offset 2026-02-03 19:23:41 -08:00
dcb Revert "Documentation: net: add flow control guide and document ethtool API" 2025-10-01 09:48:21 +02:00
devlink tools: ynl-gen: add regeneration comment 2025-11-25 19:20:42 -08:00
dns_resolver net/dns_resolver: use credential guards in dns_query() 2025-11-04 12:36:51 +01:00
dsa net: dsa: fix off-by-one in maximum bridge ID determination 2026-01-21 19:52:29 -08:00
ethernet net: optimize eth_type_trans() vs CONFIG_STACKPROTECTOR_STRONG=y 2025-11-24 19:27:31 -08:00
ethtool net: rss: fix reporting RXH_XFRM_NO_CHANGE as input_xfrm for contexts 2026-02-02 17:09:48 -08:00
handshake net/handshake: Fix null-ptr-deref in handshake_complete() 2025-12-22 12:36:40 +01:00
hsr net/hsr: fix NULL pointer dereference in prp_get_untagged_frame() 2025-12-04 11:15:13 +01:00
ieee802154 net: Convert proto callbacks from sockaddr to sockaddr_unsized 2025-11-04 19:10:33 -08:00
ife
ipv4 net: fix segmentation of forwarding fraglist GRO 2026-01-29 14:40:12 +01:00
ipv6 net: fix segmentation of forwarding fraglist GRO 2026-01-29 14:40:12 +01:00
iucv net: Remove KMSG_COMPONENT macro 2025-11-28 19:20:27 -08:00
kcm Networking changes for 6.19. 2025-12-03 17:24:33 -08:00
key pfkey: Deprecate pfkey 2025-10-30 09:03:12 +01:00
l2tp l2tp: avoid one data-race in l2tp_tunnel_del_work() 2026-01-19 09:55:41 -08:00
l3mdev net: fib_rules: Fix iif / oif matching on L3 master device 2025-04-15 17:54:56 -07:00
lapb treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
llc net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
mac80211 wifi: mac80211: correctly decode TTLM with default link map 2026-01-29 11:46:43 +01:00
mac802154
mctp net: mctp: test: move TX packetqueue from dst to dev 2025-12-01 13:52:13 -08:00
mpls mpls: Drop RTNL for RTM_NEWROUTE, RTM_DELROUTE, and RTM_GETROUTE. 2025-11-03 17:40:54 -08:00
mptcp mptcp: only reset subflow errors when propagated 2026-01-28 20:58:50 -08:00
ncsi net: ncsi: Fix buffer overflow in fetching version id 2025-06-12 18:21:59 -07:00
netfilter netfilter: nf_conncount: update last_gc only when GC has been performed 2026-01-02 10:44:28 +01:00
netlabel audit: add record for multiple task security contexts 2025-08-30 10:15:30 -04:00
netlink net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
netrom netrom: fix double-free in nr_route_frame() 2026-01-20 19:15:40 -08:00
nfc nfc: nci: Fix race between rfkill and nci_unregister_device(). 2026-01-28 19:32:26 -08:00
nsh
openvswitch net: openvswitch: fix data race in ovs_vport_get_upcall_stats 2026-01-22 12:55:22 +01:00
packet net: Convert struct sockaddr to fixed-size "sa_data[14]" 2025-11-04 19:10:33 -08:00
phonet net: Convert proto callbacks from sockaddr to sockaddr_unsized 2025-11-04 19:10:33 -08:00
psample
psp tools: ynl-gen: add regeneration comment 2025-11-25 19:20:42 -08:00
qrtr net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
rds net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
rfkill net: replace use of system_wq with system_percpu_wq 2025-09-22 17:40:30 -07:00
rose net: rose: fix invalid array index in rose_kill_by_device() 2025-12-30 11:45:51 +01:00
rxrpc rxrpc: Fix data-race warning and potential load/store tearing 2026-01-21 19:59:29 -08:00
sched net/sched: cls_u32: use skb_header_pointer_careful() 2026-01-29 18:25:22 -08:00
sctp sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT 2026-01-17 15:10:34 -08:00
shaper tools: ynl-gen: add regeneration comment 2025-11-25 19:20:42 -08:00
smc net: smc: SMC_HS_CTRL_BPF should depend on BPF_JIT 2025-12-04 11:07:18 -08:00
strparser Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-11-13 12:35:38 -08:00
sunrpc nfsd-6.19 fixes: 2025-12-24 09:23:04 -08:00
switchdev
tipc tipc: use kfree_sensitive() for session key material 2026-02-02 17:46:51 -08:00
tls Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-10-31 06:46:03 -07:00
unix net: do not write to msg_get_inq in callee 2026-01-08 08:45:13 -08:00
vmw_vsock vsock/virtio: cap TX credit to local buffer size 2026-01-22 15:41:33 +01:00
wireless wifi: cfg80211: ignore link disabled flag from userspace 2026-01-20 10:02:01 +01:00
x25 net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-11-27 12:19:08 -08:00
xfrm xfrm: set ipv4 no_pmtu_disc flag only on output sa when direction is set 2025-12-15 11:06:25 +01:00
compat.c socket: Unify getsockname and getpeername implementation 2025-11-26 13:45:23 -07:00
devres.c
Kconfig net: Kconfig: discourage drop_monitor enablement 2025-10-17 16:29:26 -07:00
Kconfig.debug
Makefile psp: base PSP device support 2025-09-18 12:32:06 +02:00
socket.c vfs-6.19-rc1.fixes 2025-12-05 15:52:30 -08:00
sysctl_net.c