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Thadeu Lima de Souza Cascardo f4f94587e1 net: fix out-of-bounds access in ops_init 
commit a26ff37e62 upstream.

net_alloc_generic is called by net_alloc, which is called without any
locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It
is read twice, first to allocate an array, then to set s.len, which is
later used to limit the bounds of the array access.

It is possible that the array is allocated and another thread is
registering a new pernet ops, increments max_gen_ptrs, which is then used
to set s.len with a larger than allocated length for the variable array.

Fix it by reading max_gen_ptrs only once in net_alloc_generic. If
max_gen_ptrs is later incremented, it will be caught in net_assign_generic.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Fixes: 073862ba5d ("netns: fix net_alloc_generic()")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240502132006.3430840-1-cascardo@igalia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-05-17 12:15:07 +02:00
..
6lowpan net: fill in MODULE_DESCRIPTION()s for 6LoWPAN 2024-02-09 14:12:01 -08:00
9p 9p: Fix read/write debug statements to report server reply 2024-04-10 16:38:09 +02:00
802 net: fill in MODULE_DESCRIPTION()s under net/802* 2023-10-28 11:29:28 +01:00
8021q net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-17 12:14:34 +02:00
appletalk net: remove SOCK_DEBUG leftovers 2023-12-26 20:31:01 +00:00
atm net: fill in MODULE_DESCRIPTION()s for mpoa 2024-02-09 14:12:01 -08:00
ax25 ax25: Fix netdev refcount issue 2024-05-02 16:35:16 +02:00
batman-adv batman-adv: Avoid infinite loop trying to resize local TT 2024-04-17 11:23:24 +02:00
bluetooth Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout 2024-05-17 12:14:52 +02:00
bpf bpf: Fix dtor CFI 2023-12-15 16:25:55 -08:00
bridge net-sysfs: convert dev->operstate reads to lockless ones 2024-05-17 12:14:54 +02:00
caif net: fill in MODULE_DESCRIPTION()s for CAIF 2024-01-05 08:06:35 -08:00
can can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER) 2024-02-14 13:53:03 +01:00
ceph libceph: init the cursor when preparing sparse read in msgr2 2024-03-06 12:43:01 +01:00
core net: fix out-of-bounds access in ops_init 2024-05-17 12:15:07 +02:00
dcb
…
dccp net: remove SOCK_DEBUG leftovers 2023-12-26 20:31:01 +00:00
devlink devlink: fix port new reply cmd type 2024-03-26 18:17:36 -04:00
dns_resolver Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
dsa net: dsa: fix netdev_priv() dereference before check on non-DSA netdevice events 2024-01-11 16:33:52 -08:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:35:30 +02:00
ethtool ethtool: netlink: Add missing ethnl_ops_begin/complete 2024-01-18 13:21:06 +01:00
handshake net/handshake: Fix handshake_req_destroy_test1 2024-02-08 18:32:29 -08:00
hsr hsr: Simplify code for announcing HSR nodes timer setup 2024-05-17 12:14:54 +02:00
ieee802154 mac802154: Avoid new associations while disassociating 2023-12-15 11:14:57 +01:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 tcp: Use refcount_inc_not_zero() in tcp_twsk_unique(). 2024-05-17 12:14:51 +02:00
ipv6 ipv6: prevent NULL dereference in ip6_output() 2024-05-17 12:14:55 +02:00
iucv net/iucv: fix the allocation size of iucv_path_table array 2024-02-16 09:25:09 +00:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-26 18:16:57 -04:00
key net: fill in MODULE_DESCRIPTION()s for af_key 2024-02-09 14:12:01 -08:00
l2tp net l2tp: drop flow hash on forward 2024-05-17 12:14:29 +02:00
l3mdev
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lapb
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llc llc: call sock_orphan() at release time 2024-01-30 13:49:09 +01:00
mac80211 wifi: mac80211: fix prep_connection error path 2024-05-17 12:14:38 +02:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:32:15 +02:00
mctp net: mctp: copy skb ext data when fragmenting 2024-03-26 18:16:49 -04:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:10:12 +02:00
mptcp mptcp: only allow set existing scheduler for net.mptcp.scheduler 2024-05-17 12:15:02 +02:00
ncsi net/ncsi: Add NC-SI 1.2 Get MC MAC Address command 2023-11-18 15:00:51 +00:00
netfilter netfilter: nf_tables: honor table dormant flag from netdev release event path 2024-05-02 16:35:21 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2023-12-07 14:23:12 -05:00
netlink netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter 2024-02-22 18:56:09 -08:00
netrom netrom: Fix data-races around sysctl_net_busy_read 2024-03-07 10:36:58 +01:00
nfc nfc: nci: Fix kcov check in nci_rx_work() 2024-05-17 12:14:53 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 12:14:29 +02:00
openvswitch net: openvswitch: Fix Use-After-Free in ovs_ct_exit 2024-05-02 16:35:20 +02:00
packet packet: annotate data-races around ignore_outgoing 2024-03-26 18:17:34 -04:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 12:14:53 +02:00
psample genetlink: Use internal flags for multicast groups 2023-12-29 08:43:59 +00:00
qrtr net: qrtr: ns: Return 0 if server port is not present 2024-01-01 18:41:29 +00:00
rds net/rds: fix possible cp null dereference 2024-04-10 16:38:02 +02:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-12-21 22:17:23 +01:00
rose net/rose: fix races in rose_kill_by_device() 2023-12-15 11:59:53 +00:00
rxrpc rxrpc: Only transmit one ACK per jumbo packet received 2024-05-17 12:14:54 +02:00
sched net/sched: Fix mirred deadlock on device recursion 2024-04-27 17:12:53 +02:00
sctp net: sctp: fix skb leak in sctp_inq_free() 2024-02-15 07:34:52 -08:00
smc net/smc: fix neighbour and rtable leak in smc_ib_find_route() 2024-05-17 12:14:55 +02:00
strparser
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sunrpc SUNRPC: add a missing rpc_stat for TCP TLS 2024-05-17 12:14:50 +02:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-02-16 09:36:37 +00:00
tipc tipc: fix UAF in error path 2024-05-17 12:15:03 +02:00
tls tls: fix lockless read of strp->msg_ready in ->poll 2024-05-02 16:35:22 +02:00
unix af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc(). 2024-05-02 16:35:23 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:38:03 +02:00
wireless wifi: cfg80211: fix rdev_dump_mpp() arguments order 2024-05-17 12:14:37 +02:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:16:57 -04:00
xdp xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING 2024-04-17 11:23:28 +02:00
xfrm xfrm: Preserve vlan tags for transport mode software GRO 2024-05-17 12:14:51 +02:00
Kconfig bpfilter: remove bpfilter 2024-01-04 10:23:10 -08:00
Kconfig.debug
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Makefile bpfilter: remove bpfilter 2024-01-04 10:23:10 -08:00
compat.c file: stop exposing receive_fd_user() 2023-12-12 14:24:14 +01:00
devres.c
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socket.c vfs-6.8.iov_iter 2024-01-08 11:43:04 -08:00
sysctl_net.c
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