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e7aa7fd10e
linux/net
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Johannes Berg e7aa7fd10e wifi: cfg80211/mac80211: reject bad MBSSID elements 
commit 8f033d2bec upstream.

Per spec, the maximum value for the MaxBSSID ('n') indicator is 8,
and the minimum is 1 since a multiple BSSID set with just one BSSID
doesn't make sense (the # of BSSIDs is limited by 2^n).

Limit this in the parsing in both cfg80211 and mac80211, rejecting
any elements with an invalid value.

This fixes potentially bad shifts in the processing of these inside
the cfg80211_gen_new_bssid() function later.

I found this during the investigation of CVE-2022-41674 fixed by the
previous patch.

Fixes: 0b8fb8235b ("cfg80211: Parsing of Multiple BSSID information in scanning")
Fixes: 78ac51f815 ("mac80211: support multi-bssid")
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-10-15 07:55:55 +02:00
..
6lowpan
9p net/9p: Initialize the iounit field during fid creation 2022-08-21 15:16:26 +02:00
802
8021q net: make free_netdev() more lenient with unregistering devices 2022-07-29 17:19:07 +02:00
appletalk
atm
ax25 net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg 2022-06-22 14:13:17 +02:00
batman-adv batman-adv: Don't skb_split skbuffs with frag_list 2022-05-18 10:23:42 +02:00
bluetooth Bluetooth: L2CAP: Fix build errors in some archs 2022-09-05 10:28:55 +02:00
bpf bpf: Don't redirect packets with invalid pkt_len 2022-09-05 10:28:56 +02:00
bpfilter
bridge netfilter: ebtables: fix memory leak when blob is malformed 2022-09-28 11:10:36 +02:00
caif
can can: j1939: j1939_session_destroy(): fix memory leak of skbs 2022-08-25 11:38:23 +02:00
ceph libceph: fix potential use-after-free on linger ping and resends 2022-05-25 09:17:56 +02:00
core net: socket: remove register_gifconf 2022-09-28 11:10:35 +02:00
dcb net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-08 19:09:37 +01:00
dccp dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock 2022-08-21 15:15:52 +02:00
decnet net: Fix data-races around sysctl_[rw]mem(_offset)?. 2022-08-31 17:15:19 +02:00
dns_resolver
dsa net: dsa: Add missing of_node_put() in dsa_port_link_register_of 2022-05-09 09:05:02 +02:00
ethernet
ethtool ethtool: do not perform operations on net devices being unregistered 2021-12-17 10:14:41 +01:00
hsr
ieee802154 net/ieee802154: fix uninit value bug in dgram_sendmsg 2022-10-15 07:55:52 +02:00
ife
ipv4 net: socket: remove register_gifconf 2022-09-28 11:10:35 +02:00
ipv6 ipv6: sr: fix out-of-bounds read when setting HMAC data. 2022-09-15 11:32:05 +02:00
iucv
kcm kcm: fix strp_init() order and cleanup 2022-09-08 11:11:37 +02:00
key af_key: Do not call xfrm_probe_algs in parallel 2022-08-31 17:15:15 +02:00
l2tp ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg 2022-06-22 14:13:15 +02:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-27 13:53:50 +02:00
lapb
llc llc: only change llc->dev when bind() succeeds 2022-03-28 09:57:10 +02:00
mac80211 wifi: cfg80211/mac80211: reject bad MBSSID elements 2022-10-15 07:55:55 +02:00
mac802154 net: mac802154: Fix a condition in the receive path 2022-09-08 11:11:40 +02:00
mpls net: Use u64_stats_fetch_begin_irq() for stats fetch. 2022-09-08 11:11:40 +02:00
mptcp net: Fix data-races around sysctl_[rw]mem(_offset)?. 2022-08-31 17:15:19 +02:00
ncsi net/ncsi: check for error return from call to nla_put_u32 2022-01-05 12:40:32 +01:00
netfilter netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain() 2022-09-28 11:10:35 +02:00
netlabel netlabel: fix out-of-bounds memory accesses 2022-04-13 21:01:00 +02:00
netlink net: genl: fix error path memory leak in policy dumping 2022-08-25 11:38:07 +02:00
netrom netrom: fix api breakage in nr_setsockopt() 2022-01-27 10:54:03 +01:00
nfc NFC: NULL out the dev->rfkill to prevent UAF 2022-06-09 10:21:01 +02:00
nsh
openvswitch net: openvswitch: fix parsing of nw_proto for IPv6 fragments 2022-06-29 08:59:45 +02:00
packet net/af_packet: check len when min_header_len equals to 0 2022-09-05 10:28:59 +02:00
phonet phonet: refcount leak in pep_sock_accep 2022-01-11 15:25:01 +01:00
psample
qrtr qrtr: Convert qrtr_ports from IDR to XArray 2022-08-25 11:38:23 +02:00
rds rds: add missing barrier to release_refill 2022-08-25 11:37:49 +02:00
rfkill
rose rose: check NULL rose_loopback_neigh->loopback 2022-08-31 17:15:16 +02:00
rxrpc rxrpc: Fix calc of resend age 2022-09-23 14:16:59 +02:00
sched net: sched: act_ct: fix possible refcount leak in tcf_ct_init() 2022-10-05 10:38:42 +02:00
sctp sctp: leave the err path free in sctp_stream_init to sctp_stream_free 2022-08-03 12:00:49 +02:00
smc net/smc: Stop the CLC flow if no link to map buffers on 2022-09-28 11:10:36 +02:00
strparser bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding 2021-11-18 14:04:27 +01:00
sunrpc SUNRPC: RPC level errors should set task->tk_rpc_status 2022-08-31 17:15:15 +02:00
switchdev
tipc tipc: fix shift wrapping bug in map_get() 2022-09-15 11:32:05 +02:00
tls net/tls: Remove the context from the list in tls_device_down 2022-08-03 12:00:46 +02:00
unix af_unix: Fix a data-race in unix_dgram_peer_wake_me(). 2022-06-14 18:32:40 +02:00
vmw_vsock vsock: Set socket state back to SS_UNCONNECTED in vsock_connect_timeout() 2022-08-25 11:37:59 +02:00
wimax
wireless wifi: cfg80211/mac80211: reject bad MBSSID elements 2022-10-15 07:55:55 +02:00
x25 net/x25: Fix null-ptr-deref caused by x25_disconnect 2022-04-08 14:40:30 +02:00
xdp xsk: Inherit need_wakeup flag for shared sockets 2022-10-15 07:55:51 +02:00
xfrm net: Fix data-races around netdev_max_backlog. 2022-08-31 17:15:19 +02:00
compat.c
devres.c
Kconfig
Makefile
socket.c net: Fix a data-race around sysctl_somaxconn. 2022-08-31 17:15:21 +02:00
sysctl_net.c