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14a3d3ef02
linux/net/ipv4
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Jakub Sitnicki d96016a764 udp: Compute L4 checksum as usual when not segmenting the skb 
If:

  1) the user requested USO, but
  2) there is not enough payload for GSO to kick in, and
  3) the egress device doesn't offer checksum offload, then

we want to compute the L4 checksum in software early on.

In the case when we are not taking the GSO path, but it has been requested,
the software checksum fallback in skb_segment doesn't get a chance to
compute the full checksum, if the egress device can't do it. As a result we
end up sending UDP datagrams with only a partial checksum filled in, which
the peer will discard.

Fixes: 10154dbded ("udp: Allow GSO transmit from devices with no checksum offload")
Reported-by: Ivan Babrou <ivan@cloudflare.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20241011-uso-swcsum-fixup-v2-1-6e1ddc199af9@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-10-15 18:12:33 -07:00
..
netfilter netfilter: fib: check correct rtable in vrf setups 2024-10-09 23:30:31 +02:00
af_inet.c net: gro: initialize network_offset in network layer 2024-05-27 16:46:59 -07:00
ah4.c net: fill in MODULE_DESCRIPTION()s for ipv4 modules 2024-02-09 14:12:02 -08:00
arp.c arp: Convert ioctl(SIOCGARP) to RCU. 2024-05-01 18:37:07 -07:00
bpf_tcp_ca.c bpf: Check unsupported ops from the bpf_struct_ops's cfi_stubs 2024-07-29 12:54:13 -07:00
cipso_ipv4.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
datagram.c ipv4: Set the routing scope properly in ip_route_output_ports(). 2024-02-12 17:33:05 -08:00
devinet.c ipv4: give an IPv4 dev to blackhole_netdev 2024-10-11 15:36:12 -07:00
esp4_offload.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-07-15 13:19:17 -07:00
esp4.c net: support non paged skb frags 2024-09-11 20:44:31 -07:00
fib_frontend.c ipv4: Unmask upper DSCP bits in fib_compute_spec_dst() 2024-08-22 16:59:57 -07:00
fib_lookup.h
fib_notifier.c
fib_rules.c ipv4: fib_rules: Add DSCP selector support 2024-09-13 21:15:44 -07:00
fib_semantics.c ipv4: delete redundant judgment statements 2024-08-23 14:27:45 +01:00
fib_trie.c ipv4: Centralize TOS matching 2024-08-20 14:57:08 +02:00
fou_bpf.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
fou_core.c fou: fix initialization of grc 2024-09-09 17:21:47 -07:00
fou_nl.c net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
fou_nl.h net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
gre_demux.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
gre_offload.c net: gro: rename skb_gro_header_hard() 2024-03-05 13:30:11 +01:00
icmp.c ipv4: icmp: Unmask upper DSCP bits in icmp_reply() 2024-09-09 14:14:53 +01:00
igmp.c ipv4: Set scope explicitly in ip_route_output(). 2024-04-08 13:20:51 +01:00
inet_connection_sock.c tcp/dccp: Don't use timer_pending() in reqsk_queue_unlink(). 2024-10-15 17:47:30 -07:00
inet_diag.c tcp: remove volatile qualifier on tw_substate 2024-08-28 17:08:16 -07:00
inet_fragment.c net: Rename mono_delivery_time to tstamp_type for scalabilty 2024-05-23 14:14:23 -07:00
inet_hashtables.c inet: constify 'struct net' parameter of various lookup helpers 2024-08-05 16:22:45 -07:00
inet_timewait_sock.c tcp: move inet_twsk_schedule helper out of header 2024-06-10 11:54:18 +01:00
inetpeer.c net: ipv4: Simplify the allocation of slab caches in inet_initpeers 2024-01-31 16:39:42 -08:00
ip_forward.c net: fix IPSTATS_MIB_OUTFORWDATAGRAMS increment after fragment check 2023-10-13 09:58:45 -07:00
ip_fragment.c net: Rename mono_delivery_time to tstamp_type for scalabilty 2024-05-23 14:14:23 -07:00
ip_gre.c ipv4: ip_gre: Fix drops of small packets in ipgre_xmit 2024-10-01 13:04:03 +02:00
ip_input.c net/ipv4: make use of the helper macro LIST_HEAD() 2024-09-06 18:10:21 -07:00
ip_options.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ip_output.c ipv4: Unmask upper DSCP bits in __ip_queue_xmit() 2024-09-04 16:57:11 -07:00
ip_sockglue.c inet: Add getsockopt support for IP_ROUTER_ALERT and IPV6_ROUTER_ALERT 2024-03-06 12:37:06 +00:00
ip_tunnel_core.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
ip_tunnel.c ipv4: ip_tunnel: Unmask upper DSCP bits in ip_tunnel_xmit() 2024-09-09 14:14:53 +01:00
ip_vti.c netdev_features: convert NETIF_F_LLTX to dev->lltx 2024-09-03 11:36:43 +02:00
ipcomp.c
ipconfig.c net: ipconfig: move ic_nameservers_fallback into #ifdef block 2023-05-22 11:17:55 +01:00
ipip.c netdev_features: convert NETIF_F_LLTX to dev->lltx 2024-09-03 11:36:43 +02:00
ipmr_base.c
ipmr.c ipv4: ipmr: Unmask upper DSCP bits in ipmr_queue_xmit() 2024-09-04 16:57:11 -07:00
Kconfig net/tcp: Expand goo.gl link 2024-07-30 18:35:12 -07:00
Makefile bpfilter: remove bpfilter 2024-01-04 10:23:10 -08:00
metrics.c net: remove NULL-pointer net parameter in ip_metrics_convert 2024-06-05 10:06:00 +01:00
netfilter.c ipv4: netfilter: Unmask upper DSCP bits in ip_route_me_harder() 2024-09-09 14:14:53 +01:00
netlink.c
nexthop.c net: nexthop: delete redundant judgment statements 2024-08-23 14:27:45 +01:00
ping.c ping: use sk_skb_reason_drop to free rx packets 2024-06-19 12:44:22 +01:00
proc.c minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
protocol.c
raw_diag.c inet_diag: add module pointer to "struct inet_diag_handler" 2024-01-23 15:13:54 +01:00
raw.c net: raw: use sk_skb_reason_drop to free rx packets 2024-06-19 12:44:22 +01:00
route.c ipv4: Unmask upper DSCP bits when building flow key 2024-08-31 17:44:51 +01:00
syncookies.c tcp: use sk_skb_reason_drop to free rx packets 2024-06-19 12:44:22 +01:00
sysctl_net_ipv4.c icmp: icmp_msgs_per_sec and icmp_msgs_burst sysctls become per netns 2024-08-30 11:14:06 -07:00
tcp_ao.c net/tcp: Disable TCP-AO static key after RCU grace period 2024-08-04 13:21:50 +01:00
tcp_bbr.c tcp: Add new args for cong_control in tcp_congestion_ops 2024-05-02 16:26:56 -07:00
tcp_bic.c
tcp_bpf.c bpf-next-for-netdev 2024-09-12 20:22:44 -07:00
tcp_cdg.c
tcp_cong.c tcp: Replace strncpy() with strscpy() 2024-07-16 07:52:15 -07:00
tcp_cubic.c bpf: Remove CONFIG_X86 and CONFIG_DYNAMIC_FTRACE guard from the tcp-cc kfuncs 2024-03-28 18:31:40 -07:00
tcp_dctcp.c tcp: Fix shift-out-of-bounds in dctcp_update_alpha(). 2024-05-21 13:34:50 +02:00
tcp_dctcp.h
tcp_diag.c inet_diag: add module pointer to "struct inet_diag_handler" 2024-01-23 15:13:54 +01:00
tcp_fastopen.c net: use unrcu_pointer() helper 2024-06-06 11:52:52 +02:00
tcp_highspeed.c
tcp_htcp.c tcp: Use clamp() in htcp_alpha_update() 2024-08-06 12:16:25 -07:00
tcp_hybla.c
tcp_illinois.c
tcp_input.c tcp: fix TFO SYN_RECV to not zero retrans_stamp with retransmits out 2024-10-03 16:18:04 -07:00
tcp_ipv4.c tcp: RX path for devmem TCP 2024-09-11 20:44:32 -07:00
tcp_lp.c tcp: rename tcp_time_stamp() to tcp_time_stamp_ts() 2023-10-23 09:35:01 +01:00
tcp_metrics.c tcp_metrics: use netlink policy for IPv6 addr len validation 2024-08-19 17:42:57 -07:00
tcp_minisocks.c tcp: RX path for devmem TCP 2024-09-11 20:44:32 -07:00
tcp_nv.c
tcp_offload.c net: gso: fix tcp fraglist segmentation after pull from frag_list 2024-10-02 17:21:47 -07:00
tcp_output.c tcp: fix mptcp DSS corruption due to large pmtu xmit 2024-10-09 19:43:44 -07:00
tcp_plb.c
tcp_rate.c
tcp_recovery.c tcp: fix excessive TLP and RACK timeouts from HZ rounding 2023-10-17 17:25:42 -07:00
tcp_scalable.c
tcp_sigpool.c net/tcp_sigpool: Use nested-BH locking for sigpool_scratch. 2024-06-24 16:41:22 -07:00
tcp_timer.c mptcp: fallback to TCP after SYN+MPC drops 2024-09-11 15:57:50 -07:00
tcp_ulp.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c tcp: RX path for devmem TCP 2024-09-11 20:44:32 -07:00
tunnel4.c net: fill in MODULE_DESCRIPTION()s for ipv4 modules 2024-02-09 14:12:02 -08:00
udp_bpf.c
udp_diag.c inet_diag: add module pointer to "struct inet_diag_handler" 2024-01-23 15:13:54 +01:00
udp_impl.h sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
udp_offload.c gso: fix udp gso fraglist segmentation after pull from frag_list 2024-10-02 17:29:31 -07:00
udp_tunnel_core.c ipv4: udp_tunnel: Unmask upper DSCP bits in udp_tunnel_dst_lookup() 2024-09-09 14:14:53 +01:00
udp_tunnel_nic.c udp_tunnel: Use flex array to simplify code 2023-10-03 11:39:34 +02:00
udp_tunnel_stub.c
udp.c udp: Compute L4 checksum as usual when not segmenting the skb 2024-10-15 18:12:33 -07:00
udplite.c udplite: remove UDPLITE_BIT 2023-09-14 16:16:36 +02:00
xfrm4_input.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
xfrm4_output.c
xfrm4_policy.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c net: fill in MODULE_DESCRIPTION()s for ipv4 modules 2024-02-09 14:12:02 -08:00