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Sungwoo Kim f3fe681715 Bluetooth: L2CAP: Fix u8 overflow 
[ Upstream commit bcd70260ef56e0aee8a4fc6cd214a419900b0765 ]

By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases
multiple times and eventually it will wrap around the maximum number
(i.e., 255).
This patch prevents this by adding a boundary check with
L2CAP_MAX_CONF_RSP

Btmon log:
Bluetooth monitor ver 5.64
= Note: Linux version 6.1.0-rc2 (x86_64)                               0.264594
= Note: Bluetooth subsystem version 2.22                               0.264636
@ MGMT Open: btmon (privileged) version 1.22                  {0x0001} 0.272191
= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0)          [hci0] 13.877604
@ RAW Open: 9496 (privileged) version 2.22                   {0x0002} 13.890741
= Open Index: 00:00:00:00:00:00                                [hci0] 13.900426
(...)
> ACL Data RX: Handle 200 flags 0x00 dlen 1033             #32 [hci0] 14.273106
        invalid packet size (12 != 1033)
        08 00 01 00 02 01 04 00 01 10 ff ff              ............
> ACL Data RX: Handle 200 flags 0x00 dlen 1547             #33 [hci0] 14.273561
        invalid packet size (14 != 1547)
        0a 00 01 00 04 01 06 00 40 00 00 00 00 00        ........@.....
> ACL Data RX: Handle 200 flags 0x00 dlen 2061             #34 [hci0] 14.274390
        invalid packet size (16 != 2061)
        0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04  ........@.......
> ACL Data RX: Handle 200 flags 0x00 dlen 2061             #35 [hci0] 14.274932
        invalid packet size (16 != 2061)
        0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00  ........@.......
= bluetoothd: Bluetooth daemon 5.43                                   14.401828
> ACL Data RX: Handle 200 flags 0x00 dlen 1033             #36 [hci0] 14.275753
        invalid packet size (12 != 1033)
        08 00 01 00 04 01 04 00 40 00 00 00              ........@...

Signed-off-by: Sungwoo Kim <iam@sung-woo.kim>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-21 17:32:08 +01:00
..
6lowpan
6lowpan: iphc: Fix an off-by-one check of array index
2021-09-15 09:50:34 +02:00
9p
9p/xen: check logical size for buffer size
2022-12-14 11:31:54 +01:00
802
net/802/garp: fix memleak in garp_request_join()
2021-07-31 08:16:11 +02:00
8021q
net: make free_netdev() more lenient with unregistering devices
2022-07-29 17:19:07 +02:00
appletalk
appletalk: Fix skb allocation size in loopback case
2021-04-07 15:00:08 +02:00
atm
net/atm: fix proc_mpc_write incorrect return value
2022-10-30 09:41:16 +01:00
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 u8 overflow
2022-12-21 17:32:08 +01:00
bpf
bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()
2022-11-25 17:45:43 +01:00
bpfilter
bpfilter: Specify the log level for the kmsg message
2021-07-14 16:56:29 +02:00
bridge
bridge: switchdev: Fix memory leaks when changing VLAN protocol
2022-12-02 17:39:57 +01:00
caif
net: caif: fix double disconnect client in chnl_net_open()
2022-11-25 17:45:46 +01:00
can
can: af_can: fix NULL pointer dereference in can_rcv_filter
2022-12-14 11:31:59 +01:00
ceph
libceph: fix potential use-after-free on linger ping and resends
2022-05-25 09:17:56 +02:00
core
netfilter: conntrack: Fix data-races around ct mark
2022-12-02 17:40:00 +01:00
dcb
net: dcb: disable softirqs in dcbnl_flush_dev()
2022-03-08 19:09:37 +01:00
dccp
dccp/tcp: Reset saddr on failure after inet6?_hash_connect().
2022-12-02 17:40:01 +01:00
decnet
net: Fix data-races around sysctl_[rw]mem(_offset)?.
2022-08-31 17:15:19 +02:00
dns_resolver
…
dsa
net: dsa: ksz: Check return value
2022-12-14 11:32:01 +01:00
ethernet
…
ethtool
ethtool: do not perform operations on net devices being unregistered
2021-12-17 10:14:41 +01:00
hsr
net: hsr: Fix potential use-after-free
2022-12-08 11:23:56 +01:00
ieee802154
net: ieee802154: fix error return code in dgram_bind()
2022-11-03 23:57:51 +09:00
ife
…
ipv4
ipv4: Fix incorrect route flushing when table ID 0 is used
2022-12-14 11:32:04 +01:00
ipv6
ipv6: avoid use-after-free in ip6_fragment()
2022-12-14 11:32:04 +01:00
iucv
net/af_iucv: remove WARN_ONCE on malformed RX packets
2021-03-07 12:34:05 +01:00
kcm
kcm: close race conditions on sk_receive_queue
2022-11-25 17:45:56 +01:00
key
af_key: Fix send_acquire race with pfkey_register
2022-12-02 17:39:58 +01:00
l2tp
net: fix a concurrency bug in l2tp_tunnel_register()
2022-11-25 17:45:54 +01:00
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
net: lapb: Copy the skb before sending a packet
2021-02-10 09:29:14 +01:00
llc
llc: only change llc->dev when bind() succeeds
2022-03-28 09:57:10 +02:00
mac80211
wifi: mac8021: fix possible oob access in ieee80211_get_rate_duration
2022-12-08 11:23:56 +01:00
mac802154
mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add()
2022-12-14 11:32:01 +01:00
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: ctnetlink: fix compilation warning after data race fixes in ct mark
2022-12-14 11:32:00 +01:00
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: nci: Bounds check struct nfc_target arrays
2022-12-14 11:32:02 +01:00
nsh
…
openvswitch
netfilter: conntrack: Fix data-races around ct mark
2022-12-02 17:40:00 +01:00
packet
packet: do not set TP_STATUS_CSUM_VALID on CHECKSUM_COMPLETE
2022-12-08 11:23:57 +01:00
phonet
phonet: refcount leak in pep_sock_accep
2022-01-11 15:25:01 +01:00
psample
net: psample: Fix netlink skb length with tunnel info
2021-03-07 12:34:07 +01:00
qrtr
qrtr: Convert qrtr_ports from IDR to XArray
2022-08-25 11:38:23 +02:00
rds
net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks()
2022-10-26 13:25:23 +02:00
rfkill
rfkill: Fix use-after-free in rfkill_resume()
2020-11-12 09:18:06 +01:00
rose
rose: Fix NULL pointer dereference in rose_send_frame()
2022-11-10 18:14:19 +01:00
rxrpc
rxrpc: Fix race between conn bundle lookup and bundle removal [ZDI-CAN-15975]
2022-12-02 17:39:59 +01:00
sched
net: sched: allow act_ct to be built without NF_NAT
2022-12-02 17:40:01 +01:00
sctp
sctp: fix memory leak in sctp_stream_outq_migrate()
2022-12-08 11:23:57 +01:00
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
net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP
2021-02-07 15:37:12 +01:00
tipc
tipc: call tipc_lxc_xmit without holding node_read_lock
2022-12-14 11:32:04 +01:00
tls
net/tls: Remove the context from the list in tls_device_down
2022-08-03 12:00:46 +02:00
unix
af_unix: Get user_ns from in_skb in unix_diag_get_exact().
2022-12-14 11:32:01 +01:00
vmw_vsock
vhost/vsock: Use kvmalloc/kvfree for larger packets.
2022-10-26 13:25:22 +02:00
wimax
…
wireless
wifi: cfg80211: don't allow multi-BSSID in S1G
2022-12-08 11:23:56 +01:00
x25
net/x25: Fix skb leak in x25_lapb_receive_frame()
2022-11-25 17:45:47 +01:00
xdp
xsk: Inherit need_wakeup flag for shared sockets
2022-10-15 07:55:51 +02:00
xfrm
xfrm: replay: Fix ESN wrap around for GSO
2022-12-02 17:39:58 +01:00
compat.c
net: Return the correct errno code
2021-06-18 10:00:06 +02:00
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
…