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Filename Latest commit message Latest commit date
Yonglong Li fd35e34ece tcp: make retransmitted SKB fit into the send window 
[ Upstream commit 536a6c8e05f95e3d1118c40ae8b3022ee2d05d52 ]

current code of __tcp_retransmit_skb only check TCP_SKB_CB(skb)->seq
in send window, and TCP_SKB_CB(skb)->seq_end maybe out of send window.
If receiver has shrunk his window, and skb is out of new window,  it
should retransmit a smaller portion of the payload.

test packetdrill script:
    0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
   +0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
   +0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0

   +0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
   +0 > S 0:0(0)  win 65535 <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
 +.05 < S. 0:0(0) ack 1 win 6000 <mss 1000,nop,nop,sackOK>
   +0 > . 1:1(0) ack 1

   +0 write(3, ..., 10000) = 10000

   +0 > . 1:2001(2000) ack 1 win 65535
   +0 > . 2001:4001(2000) ack 1 win 65535
   +0 > . 4001:6001(2000) ack 1 win 65535

 +.05 < . 1:1(0) ack 4001 win 1001

and tcpdump show:
192.168.226.67.55 > 192.0.2.1.8080: Flags [.], seq 1:2001, ack 1, win 65535, length 2000
192.168.226.67.55 > 192.0.2.1.8080: Flags [.], seq 2001:4001, ack 1, win 65535, length 2000
192.168.226.67.55 > 192.0.2.1.8080: Flags [P.], seq 4001:5001, ack 1, win 65535, length 1000
192.168.226.67.55 > 192.0.2.1.8080: Flags [.], seq 5001:6001, ack 1, win 65535, length 1000
192.0.2.1.8080 > 192.168.226.67.55: Flags [.], ack 4001, win 1001, length 0
192.168.226.67.55 > 192.0.2.1.8080: Flags [.], seq 5001:6001, ack 1, win 65535, length 1000
192.168.226.67.55 > 192.0.2.1.8080: Flags [P.], seq 4001:5001, ack 1, win 65535, length 1000

when cient retract window to 1001, send window is [4001,5002],
but TLP send 5001-6001 packet which is out of send window.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/1657532838-20200-1-git-send-email-liyonglong@chinatelecom.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-25 11:17:43 +02:00
..
6lowpan
9p xen/9p: use alloc/free_pages_exact() 2022-03-11 11:22:39 +01:00
802
8021q net: vlan: fix underflow for the real_dev refcnt 2021-12-01 09:23:34 +01:00
appletalk
atm
ax25 ax25: Fix UAF bugs in ax25 timers 2022-04-20 09:19:40 +02:00
batman-adv batman-adv: Don't skb_split skbuffs with frag_list 2022-05-18 09:47:24 +02:00
bluetooth Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put 2022-08-03 11:59:37 +02:00
bpf
bpfilter
bridge netfilter: br_netfilter: do not skip all hooks with 0 priority 2022-07-21 20:59:24 +02:00
caif
can can: bcm: use call_rcu() instead of costly synchronize_rcu() 2022-07-12 16:30:46 +02:00
ceph
core tcp: Fix data-races around sysctl knobs related to SYN option. 2022-07-29 17:14:14 +02:00
dcb net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-08 19:07:51 +01:00
dccp tcp: fix race condition when creating child sockets from syncookies 2022-04-27 13:50:45 +02:00
decnet
dns_resolver
dsa net: dsa: Add missing of_node_put() in dsa_port_parse_of 2022-03-23 09:12:07 +01:00
ethernet
hsr
ieee802154 net: ieee802154: Return meaningful error codes from the netlink helpers 2022-02-08 18:24:31 +01:00
ife
ipv4 tcp: make retransmitted SKB fit into the send window 2022-08-25 11:17:43 +02:00
ipv6 net: ping6: Fix memleak in ipv6_renew_options(). 2022-08-03 11:59:39 +02:00
iucv
kcm
key Revert "net: af_key: add check for pfkey_broadcast in function pfkey_process" 2022-06-14 18:12:01 +02:00
l2tp ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg 2022-06-22 14:11:21 +02:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-27 13:50:47 +02:00
lapb
llc llc: only change llc->dev when bind() succeeds 2022-03-28 08:46:48 +02:00
mac80211 wifi: mac80211: fix queue selection for mesh/OCB interfaces 2022-07-21 20:59:17 +02:00
mac802154
mpls net: mpls: Fix notifications when deleting a device 2021-12-08 09:01:12 +01:00
ncsi net/ncsi: check for error return from call to nla_put_u32 2022-01-05 12:37:45 +01:00
netfilter netfilter: nf_tables: fix null deref due to zeroed list head 2022-08-25 11:17:27 +02:00
netlabel netlabel: fix out-of-bounds memory accesses 2022-04-15 14:18:35 +02:00
netlink netlink: do not reset transport header in netlink_recvmsg() 2022-05-18 09:47:25 +02:00
netrom
nfc NFC: NULL out the dev->rfkill to prevent UAF 2022-06-14 18:11:33 +02:00
nsh
openvswitch net: openvswitch: fix parsing of nw_proto for IPv6 fragments 2022-06-29 08:58:44 +02:00
packet net/packet: fix packet_sock xmit return value checking 2022-04-27 13:50:47 +02:00
phonet phonet: refcount leak in pep_sock_accep 2022-01-11 15:23:33 +01:00
psample
qrtr
rds rds: memory leak in __rds_conn_create() 2021-12-22 09:29:37 +01:00
rfkill
rose net: rose: fix UAF bug caused by rose_t0timer_expiry 2022-07-12 16:30:46 +02:00
rxrpc rxrpc: Fix decision on when to generate an IDLE ACK 2022-06-14 18:11:38 +02:00
sched net/sched: act_api: Notify user space if any actions were flushed before error 2022-07-07 17:36:50 +02:00
sctp sctp: leave the err path free in sctp_stream_init to sctp_stream_free 2022-08-03 11:59:41 +02:00
smc net/smc: postpone sk_refcnt increment in connect() 2022-06-14 18:11:39 +02:00
strparser
sunrpc SUNRPC: Fix READ_PLUS crasher 2022-07-07 17:36:48 +02:00
switchdev
tipc net: tipc: fix possible refcount leak in tipc_sk_create() 2022-07-21 20:59:25 +02:00
tls net/tls: Fix race in TLS device down flow 2022-07-29 17:14:12 +02:00
unix af_unix: Fix a data-race in unix_dgram_peer_wake_me(). 2022-06-14 18:11:57 +02:00
vmw_vsock vsock: remove vsock from connected table when connect is interrupted by a signal 2022-02-23 11:59:57 +01:00
wimax
wireless nl80211: show SSID for P2P_GO interfaces 2022-06-14 18:11:32 +02:00
x25 net/x25: Fix null-ptr-deref caused by x25_disconnect 2022-04-15 14:18:21 +02:00
xdp Revert "xsk: Do not sleep in poll() when need_wakeup set" 2021-12-22 09:29:40 +01:00
xfrm ip: Fix data-races around sysctl_ip_no_pmtu_disc. 2022-07-29 17:14:10 +02:00
compat.c
Kconfig
Makefile
socket.c
sysctl_net.c