linux/net
Ruihan Li ca1fd42e7d Bluetooth: Fix potential double free caused by hci_conn_unlink
The hci_conn_unlink function is being called by hci_conn_del, which
means it should not call hci_conn_del with the input parameter conn
again. If it does, conn may have already been released when
hci_conn_unlink returns, leading to potential UAF and double-free
issues.

This patch resolves the problem by modifying hci_conn_unlink to release
only conn's child links when necessary, but never release conn itself.

Reported-by: syzbot+690b90b14f14f43f4688@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-bluetooth/000000000000484a8205faafe216@google.com/
Fixes: 06149746e7 ("Bluetooth: hci_conn: Add support for linking multiple hcon")
Signed-off-by: Ruihan Li <lrh2000@pku.edu.cn>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reported-by: syzbot+690b90b14f14f43f4688@syzkaller.appspotmail.com
Reported-by: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Reported-by: syzbot+8bb72f86fc823817bc5d@syzkaller.appspotmail.com
2023-05-19 15:37:45 -07:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p Including fixes from netfilter. 2023-05-05 19:12:01 -07:00
802 treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
8021q vlan: fix a potential uninit-value in vlan_dev_hard_start_xmit() 2023-05-17 12:55:39 +01:00
appletalk
atm atm: hide unused procfs functions 2023-05-17 21:27:30 -07:00
ax25 ax25: af_ax25: Remove unnecessary (void*) conversions 2022-11-16 13:31:03 +00:00
batman-adv net: vlan: introduce skb_vlan_eth_hdr() 2023-04-23 14:16:44 +01:00
bluetooth Bluetooth: Fix potential double free caused by hci_conn_unlink 2023-05-19 15:37:45 -07:00
bpf bpf: add test_run support for netfilter program type 2023-04-21 11:34:50 -07:00
bpfilter
bridge bridge: always declare tunnel functions 2023-05-17 21:28:58 -07:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-02 22:22:07 -08:00
can can: j1939: recvmsg(): allow MSG_CMSG_COMPAT flag 2023-05-15 22:24:46 +02:00
ceph Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
core net: datagram: fix data-races in datagram_poll() 2023-05-10 19:06:49 -07:00
dcb net: dcb: add helper functions to retrieve PCP and DSCP rewrite maps 2023-01-20 09:33:22 +00:00
dccp netfilter: keep conntrack reference until IPsecv6 policy checks are done 2023-03-22 21:50:23 +01:00
devlink devlink: Fix crash with CONFIG_NET_NS=n 2023-05-16 19:57:52 -07:00
dns_resolver cred: Do not default to init_cred in prepare_kernel_cred() 2022-11-01 10:04:52 -07:00
dsa net: dsa: tag_ocelot: call only the relevant portion of __skb_vlan_pop() on TX 2023-04-23 14:16:45 +01:00
ethernet net: ethernet: use sysfs_emit() to instead of scnprintf() 2022-12-07 20:02:44 -08:00
ethtool ethtool: Fix uninitialized number of lanes 2023-05-03 09:13:20 +01:00
handshake net/handshake: Fix section mismatch in handshake_exit 2023-04-21 20:24:57 -07:00
hsr hsr: ratelimit only when errors are printed 2023-03-16 21:11:03 -07:00
ieee802154 net: ieee802154: remove an unnecessary null pointer check 2023-03-17 09:13:53 +01:00
ife
ipv4 tcp: fix possible sk_priority leak in tcp_v4_send_reset() 2023-05-12 10:05:50 +01:00
ipv6 erspan: get the proto with the md version for collect_md 2023-05-13 16:58:58 +01:00
iucv net/iucv: Fix size of interrupt data 2023-03-16 17:34:40 -07:00
kcm net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
key af_key: Reject optional tunnel/BEET mode templates in outbound policies 2023-05-10 07:04:51 +02:00
l2tp l2tp: generate correct module alias strings 2023-03-31 09:25:12 +01:00
l3mdev
lapb
llc net: deal with most data-races in sk_wait_event() 2023-05-10 10:03:32 +01:00
mac80211 wifi: mac80211: recalc chanctx mindef before assigning 2023-05-16 10:26:00 -07:00
mac802154 mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep() 2023-04-05 13:48:04 +00:00
mctp mctp: remove MODULE_LICENSE in non-modules 2023-03-09 23:06:21 -08:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-15 10:26:37 +00:00
mptcp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-20 16:29:51 -07:00
ncsi net/ncsi: clear Tx enable mode when handling a Config required AEN 2023-04-28 09:35:33 +01:00
netfilter netfilter: nft_set_rbtree: fix null deref on element insertion 2023-05-17 14:18:28 +02:00
netlabel
netlink netlink: annotate accesses to nlk->cb_running 2023-05-10 09:28:38 +01:00
netrom netrom: Fix use-after-free caused by accept on already connected socket 2023-01-30 07:30:47 +00:00
nfc nfc: change order inside nfc_se_io error path 2023-03-07 13:37:05 -08:00
nsh net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment() 2023-05-15 08:40:27 +01:00
openvswitch net: openvswitch: fix race on port output 2023-04-07 19:42:53 -07:00
packet net: add vlan_get_protocol_and_depth() helper 2023-05-10 10:25:55 +01:00
phonet net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
psample
qrtr net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume() 2023-04-13 09:35:30 +02:00
rds rds: rds_rm_zerocopy_callback() correct order for list_add_tail() 2023-02-13 09:33:39 +00:00
rfkill net: rfkill-gpio: Add explicit include for of.h 2023-04-06 20:36:27 +02:00
rose net/rose: Fix to not accept on connected socket 2023-01-28 00:19:57 -08:00
rxrpc Including fixes from netfilter. 2023-05-05 19:12:01 -07:00
sched net/sched: flower: fix error handler on replace 2023-05-05 10:01:31 +01:00
sctp sctp: delete the nested flexible array hmac 2023-04-21 08:19:30 +01:00
smc net/smc: Reset connection when trying to use SMCRv2 fails. 2023-05-19 08:54:04 +01:00
strparser
sunrpc nfsd-6.4 fixes: 2023-05-17 09:56:01 -07:00
switchdev
tipc tipc: check the bearer min mtu properly when setting it by netlink 2023-05-15 10:21:20 +01:00
tls tls: rx: strp: don't use GFP_KERNEL in softirq context 2023-05-19 08:37:37 +01:00
unix af_unix: Fix data races around sk->sk_shutdown. 2023-05-10 19:06:53 -07:00
vmw_vsock vsock: avoid to close connected socket after the timeout 2023-05-12 10:04:10 +01:00
wireless wifi: cfg80211: Drop entries with invalid BSSIDs in RNR 2023-05-16 10:09:50 -07:00
x25 net/x25: Fix to not accept on connected socket 2023-01-25 09:51:04 +00:00
xdp bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
xfrm ipsec-2023-05-16 2023-05-16 20:52:35 -07:00
Kconfig net/handshake: Add Kunit tests for the handshake consumer API 2023-04-19 18:48:48 -07:00
Kconfig.debug
Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c
socket.c net: annotate sk->sk_err write from do_recvmmsg() 2023-05-10 09:58:29 +01:00
sysctl_net.c