Yan Zhai 359bce81b8 ipv6: avoid atomic fragment on GSO packets ... [ Upstream commit 03d6c848bfb406e9ef6d9846d759e97beaeea113 ] 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 11:08:16 +01:00
..
6lowpan	6lowpan: iphc: Fix an off-by-one check of array index	2021-07-22 16:19:03 +02:00
9p	9p: virtio: make sure 'offs' is initialized in zc_request	2023-09-19 12:22:27 +02:00
802	mrp: introduce active flags to prevent UAF when applicant uninit	2022-12-31 13:14:42 +01:00
8021q	vlan: fix a potential uninit-value in vlan_dev_hard_start_xmit()	2023-05-24 17:36:52 +01:00
appletalk	net: socket: rework compat_ifreq_ioctl()	2021-07-23 14:20:25 +01:00
atm	atm: hide unused procfs functions	2023-06-09 10:32:26 +02:00
ax25	net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg	2022-06-22 14:22:01 +02:00
batman-adv	batman-adv: Hold rtnl lock during MTU update via netlink	2023-08-30 16:18:18 +02:00
bluetooth	Bluetooth: hci_sock: Correctly bounds check and pad HCI_MON_NEW_INDEX name	2023-10-25 11:59:04 +02:00
bpf	bpf: Move skb->len == 0 checks into __bpf_redirect	2022-12-31 13:14:11 +01:00
bpfilter	bpfilter: Specify the log level for the kmsg message	2021-06-25 13:13:50 +02:00
bridge	net: bridge: use DEV_STATS_INC()	2023-10-06 13:18:07 +02:00
caif	net: caif: Fix use-after-free in cfusbl_device_notify()	2023-03-17 08:48:54 +01:00
can	can: isotp: isotp_sendmsg(): fix TX state detection and wait behavior	2023-11-08 17:26:49 +01:00
ceph	libceph: use kernel_connect()	2023-10-19 23:05:36 +02:00
core	neighbour: fix various data-races	2023-11-08 17:26:38 +01:00
dcb	net: dcb: choose correct policy to parse DCB_ATTR_BCN	2023-08-11 15:13:53 +02:00
dccp	dccp: fix dccp_v4_err()/dccp_v6_err() again	2023-10-06 13:18:06 +02:00
dns_resolver	…
dsa	net: dsa: tag_sja1105: fix MAC DA patching from meta frames	2023-07-23 13:47:30 +02:00
ethernet	move netdev_boot_setup into Space.c	2021-08-03 13:05:26 +01:00
ethtool	ethtool: Fix uninitialized number of lanes	2023-05-17 11:50:18 +02:00
hsr	hsr: Fix uninit-value access in fill_frame_info()	2023-09-19 12:23:03 +02:00
ieee802154	net: ieee802154: fix error return code in dgram_bind()	2022-11-03 23:59:14 +09:00
ife	…
ipv4	tcp: fix cookie_init_timestamp() overflows	2023-11-20 11:08:16 +01:00
ipv6	ipv6: avoid atomic fragment on GSO packets	2023-11-20 11:08:16 +01:00
iucv	net/iucv: Fix size of interrupt data	2023-03-22 13:31:28 +01:00
kcm	kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg().	2023-09-19 12:23:04 +02:00
key	net: af_key: fix sadb_x_filter validation	2023-08-26 14:23:32 +02:00
l2tp	ipv4, ipv6: Fix handling of transhdrlen in __ip{,6}_append_data()	2023-10-10 21:59:07 +02:00
l3mdev	l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu	2022-04-27 14:38:53 +02:00
lapb	…
llc	llc: Don't drop packet from non-root netns.	2023-07-27 08:47:02 +02:00
mac80211	wifi: mac80211: allow transmitting EAPOL frames with tainted key	2023-10-25 11:59:00 +02:00
mac802154	mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add()	2022-12-14 11:37:25 +01:00
mctp	mctp: perform route lookups under a RCU read-side lock	2023-10-25 11:58:59 +02:00
mpls	net: mpls: fix stale pointer if allocation fails during device rename	2023-02-22 12:57:09 +01:00
mptcp	mptcp: more conservative check for zero probes	2023-11-08 17:26:35 +01:00
ncsi	ncsi: Propagate carrier gain/loss events to the NCSI controller	2023-10-06 13:18:18 +02:00
netfilter	netfilter: nf_tables: Drop pointless memset when dumping rules	2023-11-20 11:08:15 +01:00
netlabel	netlabel: fix shift wrapping bug in netlbl_catmap_setlong()	2023-09-19 12:22:29 +02:00
netlink	netlink: Add __sock_i_ino() for __netlink_diag_dump().	2023-07-23 13:46:56 +02:00
netrom	netrom: Deny concurrent connect().	2023-09-19 12:22:35 +02:00
nfc	nfc: nci: fix possible NULL pointer dereference in send_acknowledge()	2023-10-25 11:58:55 +02:00
nsh	net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment()	2023-05-24 17:36:51 +01:00
openvswitch	net: openvswitch: fix possible memory leak in ovs_meter_cmd_set()	2023-02-22 12:57:09 +01:00
packet	net/packet: annotate data-races around tp->status	2023-08-16 18:22:01 +02:00
phonet	phonet: refcount leak in pep_sock_accep	2022-01-11 15:35:16 +01:00
psample	…
qrtr	net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()	2023-04-20 12:13:53 +02:00
rds	net: prevent address rewrite in kernel_bind()	2023-10-19 23:05:33 +02:00
rfkill	net: rfkill: gpio: prevent value glitch during probe	2023-10-25 11:58:57 +02:00
rose	net/rose: Fix to not accept on connected socket	2023-02-22 12:57:02 +01:00
rxrpc	rxrpc: Fix hard call timeout units	2023-05-17 11:50:17 +02:00
sched	net: sched: cls_u32: Fix allocation size in u32_init()	2023-11-08 17:26:45 +01:00
sctp	sctp: update hb timer immediately after users change hb_interval	2023-10-10 21:59:08 +02:00
smc	net/smc: Fix pos miscalculation in statistics	2023-10-19 23:05:34 +02:00
strparser	bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding	2021-11-18 19:17:11 +01:00
sunrpc	Revert "SUNRPC dont update timeout value on connection reset"	2023-10-06 13:18:22 +02:00
switchdev	net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge	2021-08-04 12:35:07 +01:00
tipc	tipc: Use size_add() in calls to struct_size()	2023-11-20 11:08:14 +01:00
tls	net/tls: do not free tls_rec on async operation in bpf_exec_tx_verdict()	2023-09-19 12:23:04 +02:00
unix	af_unix: Fix data-race around unix_tot_inflight.	2023-09-19 12:22:59 +02:00
vmw_vsock	vsock/virtio: initialize the_virtio_vsock before using VQs	2023-11-08 17:26:37 +01:00
wireless	wifi: cfg80211: avoid leaking stack data into trace	2023-10-25 11:59:00 +02:00
x25	net/x25: Fix to not accept on connected socket	2023-02-09 11:26:40 +01:00
xdp	xsk: Fix xsk_diag use-after-free error during socket cleanup	2023-09-19 12:22:58 +02:00
xfrm	xfrm: interface: use DEV_STATS_INC()	2023-10-25 11:58:56 +02:00
Kconfig	Remove DECnet support from kernel	2023-06-21 15:59:15 +02:00
Makefile	Remove DECnet support from kernel	2023-06-21 15:59:15 +02:00
compat.c	…
devres.c	…
socket.c	net: prevent address rewrite in kernel_bind()	2023-10-19 23:05:33 +02:00
sysctl_net.c	…