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Cong Wang 222e05e0a2 llc: use refcount_inc_not_zero() for llc_sap_find()
[ Upstream commit 0dcb82254d ]

llc_sap_put() decreases the refcnt before deleting sap
from the global list. Therefore, there is a chance
llc_sap_find() could find a sap with zero refcnt
in this global list.

Close this race condition by checking if refcnt is zero
or not in llc_sap_find(), if it is zero then it is being
removed so we can just treat it as gone.

Reported-by: <syzbot+278893f3f7803871f7ce@syzkaller.appspotmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-22 07:46:08 +02:00
..
6lowpan License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
9p 9p/trans_virtio: discard zero-length reply 2018-02-22 15:42:30 +01:00
802 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
8021q net: fix use-after-free in GRO with ESP 2018-07-22 14:28:44 +02:00
appletalk License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atm atm: Preserve value of skb->truesize when accounting to vcc 2018-07-22 14:28:43 +02:00
ax25 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
batman-adv batman-adv: fix packet loss for broadcasted DHCP packets to a server 2018-05-30 07:52:19 +02:00
bluetooth Bluetooth: hidp: buffer overflow in hidp_process_report 2018-08-17 21:01:11 +02:00
bpf bpf: Align packet data properly in program testing framework. 2017-05-02 11:46:28 -04:00
bridge netfilter: ebtables: reject non-bridge targets 2018-07-22 14:28:49 +02:00
caif License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
can can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once 2018-01-23 19:58:17 +01:00
ceph libceph, ceph: avoid memory leak when specifying same option several times 2018-05-30 07:52:04 +02:00
core rtnetlink: add rtnl_link_state check in rtnl_configure_link 2018-07-28 07:55:42 +02:00
dcb rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
dccp dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart() 2018-08-22 07:46:08 +02:00
decnet dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock 2018-02-25 11:07:52 +01:00
dns_resolver KEYS: DNS: fix parsing multiple options 2018-07-22 14:28:49 +02:00
dsa net: dsa: Do not suspend/resume closed slave_dev 2018-08-06 16:20:48 +02:00
ethernet networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
hsr net/hsr: Check skb_put_padto() return value 2017-08-22 13:40:23 -07:00
ieee802154 ieee802154: 6lowpan: fix possible NULL deref in lowpan_device_event() 2018-03-31 18:10:40 +02:00
ife net: sched: ife: check on metadata length 2018-04-29 11:33:13 +02:00
ipv4 ipv4: frags: handle possible skb truesize change 2018-08-06 16:20:47 +02:00
ipv6 multicast: do not restore deleted record source filter mode to new one 2018-07-28 07:55:42 +02:00
ipx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iucv net/iucv: Free memory obtained by kzalloc 2018-03-31 18:10:41 +02:00
kcm kcm: Fix use-after-free caused by clonned sockets 2018-06-11 22:49:19 +02:00
key af_key: Always verify length of provided sadb_key 2018-06-16 09:45:14 +02:00
l2tp l2tp: use sk_dst_check() to avoid race on sk->sk_dst_cache 2018-08-22 07:46:08 +02:00
l3mdev
lapb net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t 2017-07-04 22:35:16 +01:00
llc llc: use refcount_inc_not_zero() for llc_sap_find() 2018-08-22 07:46:08 +02:00
mac80211 mac80211: use timeout from the AddBA response instead of the request 2018-06-21 04:02:55 +09:00
mac802154 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpls mpls, nospec: Sanitize array index in mpls_label_ok() 2018-02-22 15:42:28 +01:00
ncsi net/ncsi: Fix length of GVI response packet 2017-10-21 01:56:38 +01:00
netfilter netfilter: nf_tables: check msg_type before nft_trans_set(trans) 2018-08-03 07:50:25 +02:00
netlabel netlabel: If PF_INET6, check sk_buff ip header version 2018-05-30 07:52:40 +02:00
netlink netlink: Don't shift on 64 for ngroups 2018-08-09 12:16:38 +02:00
netrom net, netrom: convert nr_node.refcount from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
nfc net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL. 2018-07-22 14:28:49 +02:00
nsh nsh: set mac len based on inner packet 2018-07-22 14:28:49 +02:00
openvswitch openvswitch: Don't swap table in nlattr_set() after OVS_ATTR_NESTED is found 2018-05-19 10:20:24 +02:00
packet net/packet: fix use-after-free 2018-07-22 14:28:46 +02:00
phonet License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
psample MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
qrtr qrtr: add MODULE_ALIAS macro to smd 2018-05-30 07:52:05 +02:00
rds rds: avoid unenecessary cong_update in loop transport 2018-07-22 14:28:49 +02:00
rfkill rfkill: gpio: fix memory leak in probe error path 2018-05-16 10:10:26 +02:00
rose net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
rxrpc rxrpc: Fix user call ID check in rxrpc_service_prealloc_one 2018-08-06 16:20:48 +02:00
sched net_sched: blackhole: tell upper qdisc about dropped packets 2018-07-22 14:28:46 +02:00
sctp sctp: not allow transport timeout value less than HZ/5 for hb_timer 2018-06-11 22:49:20 +02:00
smc smc: fix sendpage() call 2018-06-21 04:02:53 +09:00
strparser strparser: Remove early eaten to fix full tcp receive buffer stall 2018-07-22 14:28:47 +02:00
sunrpc xprtrdma: Fix corner cases when handling device removal 2018-07-22 14:28:42 +02:00
switchdev net: switchdev: Remove bridge bypass support from switchdev 2017-08-07 14:48:48 -07:00
tipc tipc: eliminate KMSAN uninit-value in strcmp complaint 2018-06-21 04:02:56 +09:00
tls sock: fix sg page frag coalescing in sk_alloc_sg 2018-07-28 07:55:42 +02:00
unix License cleanup: add SPDX license identifiers to some files 2017-11-02 10:04:46 -07:00
vmw_vsock VSOCK: fix loopback on big-endian systems 2018-07-22 14:28:47 +02:00
wimax License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
wireless cfg80211: clear wep keys after disconnection 2018-05-30 07:51:58 +02:00
x25 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfrm xfrm: Fix transport mode skb control buffer usage. 2018-05-30 07:52:19 +02:00
Kconfig net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros. 2017-09-04 13:25:20 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat.c net: support compat 64-bit time in {s,g}etsockopt 2018-05-19 10:20:24 +02:00
socket.c net: socket: fix potential spectre v1 gadget in socketcall 2018-08-06 16:20:48 +02:00
sysctl_net.c sysctl: Remove dead register_sysctl_root 2017-04-16 23:42:49 -05:00