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linux/net
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Jordan Rife 0bdf399342 net: Avoid address overwrite in kernel_connect 
BPF programs that run on connect can rewrite the connect address. For
the connect system call this isn't a problem, because a copy of the address
is made when it is moved into kernel space. However, kernel_connect
simply passes through the address it is given, so the caller may observe
its address value unexpectedly change.

A practical example where this is problematic is where NFS is combined
with a system such as Cilium which implements BPF-based load balancing.
A common pattern in software-defined storage systems is to have an NFS
mount that connects to a persistent virtual IP which in turn maps to an
ephemeral server IP. This is usually done to achieve high availability:
if your server goes down you can quickly spin up a replacement and remap
the virtual IP to that endpoint. With BPF-based load balancing, mounts
will forget the virtual IP address when the address rewrite occurs
because a pointer to the only copy of that address is passed down the
stack. Server failover then breaks, because clients have forgotten the
virtual IP address. Reconnects fail and mounts remain broken. This patch
was tested by setting up a scenario like this and ensuring that NFS
reconnects worked after applying the patch.

Signed-off-by: Jordan Rife <jrife@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-08-23 09:42:05 +01:00
..
6lowpan
9p net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
802
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
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: Drop per algo GW section class code 2023-08-14 18:01:21 +02:00
bluetooth net: annotate data-races around sk->sk_lingertime 2023-08-21 07:41:57 +01:00
bpf page_pool: split types and declarations from page_pool.h 2023-08-07 13:05:19 -07:00
bpfilter net: Use umd_cleanup_helper() 2023-05-31 13:06:57 +02:00
bridge netfilter: ebtables: fix fortify warnings in size_entry_mwt() 2023-08-22 15:13:20 +02:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
ceph libceph: fix potential hang in ceph_osdc_notify() 2023-08-02 09:07:34 +02:00
core net: remove unnecessary input parameter 'how' in ifdown function 2023-08-22 13:19:02 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp inet: move inet->recverr to inet->inet_flags 2023-08-16 11:09:17 +01:00
devlink genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
dns_resolver
dsa net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
ethernet
ethtool ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
handshake net/handshake: Trace events for TLS Alert helpers 2023-07-28 14:07:59 -07:00
hsr net/hsr: Remove unused function declarations 2023-07-31 20:11:47 -07:00
ieee802154 genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
ife
ipv4 net: remove unnecessary input parameter 'how' in ifdown function 2023-08-22 13:19:02 +02:00
ipv6 net: remove unnecessary input parameter 'how' in ifdown function 2023-08-22 13:19:02 +02:00
iucv
kcm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp inet: introduce inet->inet_flags 2023-08-16 11:09:16 +01:00
l3mdev
lapb
llc net/llc/llc_conn.c: fix 4 instances of -Wmissing-variable-declarations 2023-08-09 15:34:28 -07:00
mac80211 - New Drivers 2023-07-03 11:26:05 -07:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
mctp sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
mpls net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
mptcp mptcp: register default scheduler 2023-08-22 17:31:19 -07:00
ncsi genetlink: make genl_info->nlhdr const 2023-08-15 14:54:44 -07:00
netfilter netfilter: nf_tables: allow loop termination for pending fatal signal 2023-08-22 15:14:32 +02:00
netlabel netlabel: Remove unused declaration netlbl_cipsov4_doi_free() 2023-08-02 12:28:22 -07:00
netlink genetlink: add a family pointer to struct genl_info 2023-08-15 15:01:03 -07:00
netrom sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
nfc genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
nsh net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample
qrtr net: qrtr: Handle IPCR control port format of older targets 2023-07-17 09:02:30 +01:00
rds net/rds: Remove unused function declarations 2023-08-13 12:25:42 +01:00
rfkill
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: annotate data-races around sk->sk_lingertime 2023-08-21 07:41:57 +01:00
sctp inet: move inet->mc_loop to inet->inet_frags 2023-08-16 11:09:17 +01:00
smc net: annotate data-races around sk->sk_lingertime 2023-08-21 07:41:57 +01:00
strparser
sunrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
switchdev net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
tipc genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
tls Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
unix net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
vmw_vsock vsock: Remove unused function declarations 2023-07-31 14:41:08 -07:00
wireless wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems() 2023-08-09 14:43:35 +02:00
x25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
compat.c
devres.c
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug
Makefile
socket.c net: Avoid address overwrite in kernel_connect 2023-08-23 09:42:05 +01:00
sysctl_net.c