Yan Zhai 1c3b6106b6 ipv6: avoid atomic fragment on GSO packets ... [ Upstream commit 03d6c848bf ] When the ipv6 stack output a GSO packet, if its gso_size is larger than dst MTU, then all segments would be fragmented. However, it is possible for a GSO packet to have a trailing segment with smaller actual size than both gso_size as well as the MTU, which leads to an "atomic fragment". Atomic fragments are considered harmful in RFC-8021. An Existing report from APNIC also shows that atomic fragments are more likely to be dropped even it is equivalent to a no-op [1]. Add an extra check in the GSO slow output path. For each segment from the original over-sized packet, if it fits with the path MTU, then avoid generating an atomic fragment. Link: https://www.potaroo.net/presentations/2022-03-01-ipv6-frag.pdf [1] Fixes: b210de4f8c ("net: ipv6: Validate GSO SKB before finish IPv6 processing") Reported-by: David Wragg <dwragg@cloudflare.com> Signed-off-by: Yan Zhai <yan@cloudflare.com> Link: https://lore.kernel.org/r/90912e3503a242dca0bc36958b11ed03a2696e5e.1698156966.git.yan@cloudflare.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-11-20 11:56:54 +01:00
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6lowpan
9p	9p: remove dead stores (variable set again without being read)	2023-07-20 19:14:50 +00:00
802
8021q	Revert "vlan: Fix VLAN 0 memory leak"	2023-08-14 08:14:00 +01:00
appletalk	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
atm	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
ax25	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
batman-adv	batman-adv: Hold rtnl lock during MTU update via netlink	2023-08-22 17:25:10 -07:00
bluetooth	Bluetooth: hci_sync: Fix Opcode prints in bt_dev_dbg/err	2023-11-20 11:56:53 +01:00
bpf
bpfilter	net: Use umd_cleanup_helper()	2023-05-31 13:06:57 +02:00
bridge	neighbour: fix data-races around n->output	2023-10-10 22:03:01 +02:00
caif	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
can	can: isotp: isotp_sendmsg(): fix TX state detection and wait behavior	2023-10-19 23:10:59 +02:00
ceph	libceph: use kernel_connect()	2023-10-19 23:11:05 +02:00
core	net: skb_find_text: Ignore patterns extending past 'to'	2023-11-20 11:56:51 +01:00
dcb	net: dcb: choose correct policy to parse DCB_ATTR_BCN	2023-08-01 21:07:46 -07:00
dccp	dccp: fix dccp_v4_err()/dccp_v6_err() again	2023-10-06 13:15:54 +02:00
devlink	devlink: Hold devlink lock on health reporter dump get	2023-10-19 23:10:59 +02:00
dns_resolver
dsa	net: dsa: fix older DSA drivers using phylink	2023-07-27 17:19:46 -07:00
ethernet
ethtool	ethtool: plca: fix plca enable data type while parsing the value	2023-10-10 22:03:02 +02:00
handshake	net/handshake: fix file ref count in handshake_nl_accept_doit()	2023-11-02 09:36:54 +01:00
hsr	net: hsr: Add __packed to struct hsr_sup_tlv.	2023-10-06 13:16:17 +02:00
ieee802154	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
ife
ipv4	tcp: fix cookie_init_timestamp() overflows	2023-11-20 11:56:52 +01:00
ipv6	ipv6: avoid atomic fragment on GSO packets	2023-11-20 11:56:54 +01:00
iucv
kcm	kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg().	2023-09-19 12:30:30 +02:00
key	net: af_key: fix sadb_x_filter validation	2023-06-29 10:47:29 +02:00
l2tp	udp: annotate data-races around udp->encap_type	2023-11-20 11:56:47 +01:00
l3mdev
lapb
llc	llc: Don't drop packet from non-root netns.	2023-07-20 10:46:28 +02:00
mac80211	wifi: mac80211: Fix setting vif links	2023-11-20 11:56:52 +01:00
mac802154	Core WPAN changes:	2023-06-24 15:41:46 -07:00
mctp	mctp: perform route lookups under a RCU read-side lock	2023-10-19 23:11:06 +02:00
mpls	net: move gso declarations and functions to their own files	2023-06-10 00:11:41 -07:00
mptcp	mptcp: properly account fastopen data	2023-11-20 11:56:54 +01:00
ncsi	ncsi: Propagate carrier gain/loss events to the NCSI controller	2023-10-06 13:16:17 +02:00
netfilter	netfilter: nf_tables: Drop pointless memset when dumping rules	2023-11-20 11:56:51 +01:00
netlabel	netlabel: Reorder fields in 'struct netlbl_domaddr6_map'	2023-06-20 20:06:56 -07:00
netlink	netlink: annotate data-races around sk->sk_err	2023-10-10 22:03:03 +02:00
netrom	netrom: Deny concurrent connect().	2023-09-13 09:53:12 +02:00
nfc	nfc: nci: fix possible NULL pointer dereference in send_acknowledge()	2023-10-25 12:16:10 +02:00
nsh	net: move gso declarations and functions to their own files	2023-06-10 00:11:41 -07:00
openvswitch	net: openvswitch: reject negative ifindex	2023-08-15 19:07:52 -07:00
packet	af_packet: Fix fortified memcpy() without flex array.	2023-10-19 23:11:01 +02:00
phonet	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
psample
qrtr	Networking changes for 6.5.	2023-06-28 16:43:10 -07:00
rds	net: prevent address rewrite in kernel_bind()	2023-10-19 23:10:56 +02:00
rfkill	net: rfkill: reduce data->mtx scope in rfkill_fop_open	2023-10-25 12:16:30 +02:00
rose	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
rxrpc	Networking changes for 6.5.	2023-06-28 16:43:10 -07:00
sched	net: sched: cls_u32: Fix allocation size in u32_init()	2023-11-08 14:08:56 +01:00
sctp	sctp: update hb timer immediately after users change hb_interval	2023-10-10 22:03:03 +02:00
smc	net/smc: return the right falback reason when prefix checks fail	2023-10-25 12:16:10 +02:00
strparser
sunrpc	SUNRPC/TLS: Lock the lower_xprt during the tls handshake	2023-10-25 12:16:18 +02:00
switchdev
tipc	tipc: Use size_add() in calls to struct_size()	2023-11-20 11:56:48 +01:00
tls	tls: Use size_add() in call to struct_size()	2023-11-20 11:56:48 +01:00
unix	af_unix: Fix data-race around unix_tot_inflight.	2023-09-19 12:30:18 +02:00
vmw_vsock	vsock/virtio: initialize the_virtio_vsock before using VQs	2023-11-02 09:36:46 +01:00
wireless	wifi: cfg80211: fix off-by-one in element defrag	2023-11-20 11:56:46 +01:00
x25	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
xdp	xdp: Fix zero-size allocation warning in xskq_create()	2023-10-19 23:11:00 +02:00
xfrm	net: xfrm: skip policies marked as dead while reinserting policies	2023-10-25 12:16:13 +02:00
compat.c
devres.c
Kconfig	net/core: Enable socket busy polling on -RT	2023-05-26 08:51:26 +01:00
Kconfig.debug
Makefile
socket.c	net: prevent address rewrite in kernel_bind()	2023-10-19 23:10:56 +02:00
sysctl_net.c