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Xin Long 7de5d0c7e7 tipc: add NULL pointer check before calling kfree_rcu 
[ Upstream commit 42dec1dbe38239cf91cc1f4df7830c66276ced37 ]

Unlike kfree(p), kfree_rcu(p, rcu) won't do NULL pointer check. When
tipc_nametbl_remove_publ returns NULL, the panic below happens:

   BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
   RIP: 0010:__call_rcu+0x1d/0x290
   Call Trace:
    <IRQ>
    tipc_publ_notify+0xa9/0x170 [tipc]
    tipc_node_write_unlock+0x8d/0x100 [tipc]
    tipc_node_link_down+0xae/0x1d0 [tipc]
    tipc_node_check_dest+0x3ea/0x8f0 [tipc]
    ? tipc_disc_rcv+0x2c7/0x430 [tipc]
    tipc_disc_rcv+0x2c7/0x430 [tipc]
    ? tipc_rcv+0x6bb/0xf20 [tipc]
    tipc_rcv+0x6bb/0xf20 [tipc]
    ? ip_route_input_slow+0x9cf/0xb10
    tipc_udp_recv+0x195/0x1e0 [tipc]
    ? tipc_udp_is_known_peer+0x80/0x80 [tipc]
    udp_queue_rcv_skb+0x180/0x460
    udp_unicast_rcv_skb.isra.56+0x75/0x90
    __udp4_lib_rcv+0x4ce/0xb90
    ip_local_deliver_finish+0x11c/0x210
    ip_local_deliver+0x6b/0xe0
    ? ip_rcv_finish+0xa9/0x410
    ip_rcv+0x273/0x362

Fixes: 97ede29e80ee ("tipc: convert name table read-write lock to RCU")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 09:08:02 +02:00
..
6lowpan
6lowpan: iphc: reset mac_header after decompress to fix panic
2018-10-03 17:00:47 -07:00
9p
9p/virtio: Add cleanup path in p9_virtio_init
2019-07-31 07:28:39 +02:00
802
…
8021q
vlan: disable SIOCSHWTSTAMP in container
2019-05-16 19:42:34 +02:00
appletalk
appletalk: Fix use-after-free in atalk_proc_exit
2019-04-20 09:15:07 +02:00
atm
net: atm: Fix potential Spectre v1 vulnerabilities
2019-04-27 09:35:33 +02:00
ax25
ax25: fix inconsistent lock state in ax25_destroy_timer
2019-06-22 08:16:14 +02:00
batman-adv
batman-adv: Only read OGM tvlv_len after buffer len check
2019-09-16 08:20:45 +02:00
bluetooth
Bluetooth: Add SMP workaround Microsoft Surface Precision Mouse bug
2019-07-31 07:28:43 +02:00
bpf
…
bridge
bridge/mdb: remove wrong use of NLM_F_MULTI
2019-09-19 09:07:59 +02:00
caif
caif: reduce stack size with KASAN
2019-05-08 07:20:45 +02:00
can
can: af_can: Fix error path of can_init()
2019-07-21 09:04:22 +02:00
ceph
libceph: fix PG split vs OSD (re)connect race
2019-08-29 08:26:42 +02:00
core
net: gso: Fix skb_segment splat when splitting gso_size mangled skb having linear-headed frag_list
2019-09-19 09:08:01 +02:00
dcb
net: dcb: For wild-card lookups, use priority -1, not 0
2018-09-19 22:43:43 +02:00
dccp
dccp: do not use ipv6 header for ipv4 flow
2019-04-03 06:25:08 +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: Fix error cleanup path in dsa_init_module
2019-05-16 19:42:34 +02:00
ethernet
…
hsr
net/hsr: fix possible crash in add_timer()
2019-03-19 13:13:22 +01:00
ieee802154
ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module
2019-04-27 09:35:40 +02:00
ife
net: sched: ife: check on metadata length
2018-04-29 11:33:13 +02:00
ipv4
tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR
2019-09-19 09:08:02 +02:00
ipv6
ipv6: Fix the link time qualifier of 'ping_v6_proc_exit_net()'
2019-09-19 09:08:00 +02:00
ipx
…
iucv
net/iucv: Free memory obtained by kzalloc
2018-03-31 18:10:41 +02:00
kcm
kcm: switch order of device registration to fix a crash
2019-04-17 08:37:45 +02:00
key
xfrm: clean up xfrm protocol checks
2019-09-16 08:20:44 +02:00
l2tp
compat_ioctl: pppoe: fix PPPOEIOCSFWD handling
2019-08-09 17:53:35 +02:00
l3mdev
…
lapb
lapb: fixed leak of control-blocks.
2019-06-22 08:16:14 +02:00
llc
llc: fix skb leak in llc_build_and_send_ui_pkt()
2019-06-09 09:18:10 +02:00
mac80211
mac80211: fix possible sta leak
2019-09-06 10:20:59 +02:00
mac802154
net: mac802154: tx: expand tailroom if necessary
2018-09-09 19:55:52 +02:00
mpls
mpls: Return error for RTA_GATEWAY attribute
2019-03-13 14:03:09 -07:00
ncsi
…
netfilter
netfilter: ipset: Fix rename concurrency with listing
2019-08-29 08:26:39 +02:00
netlabel
netlabel: fix out-of-bounds memory accesses
2019-03-13 14:03:08 -07:00
netlink
genetlink: Fix a memory leak on error path
2019-04-03 06:25:08 +02:00
netrom
netrom: hold sock when setting skb->destructor
2019-07-31 07:28:46 +02:00
nfc
nfc: fix potential illegal memory access
2019-07-31 07:28:45 +02:00
nsh
nsh: set mac len based on inner packet
2018-07-22 14:28:49 +02:00
openvswitch
net: openvswitch: fix csum updates for MPLS actions
2019-07-31 07:28:45 +02:00
packet
net/packet: fix race in tpacket_snd()
2019-08-25 10:50:26 +02:00
phonet
phonet: fix building with clang
2019-03-23 14:35:16 +01:00
psample
net: sched: act_sample: fix psample group handling on overwrite
2019-09-10 10:32:21 +01:00
qrtr
net: qrtr: Broadcast messages only from control port
2018-08-24 13:09:13 +02:00
rds
net: rds: fix memory leak in rds_ib_flush_mr_pool
2019-06-11 12:21:45 +02:00
rfkill
rfkill: gpio: fix memory leak in probe error path
2018-05-16 10:10:26 +02:00
rose
net/rose: fix unbound loop in rose_loopback_timer()
2019-05-02 09:40:34 +02:00
rxrpc
rxrpc: Fix send on a connected, but unbound socket
2019-07-31 07:28:45 +02:00
sched
sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero
2019-09-19 09:08:01 +02:00
sctp
sctp: use transport pf_retrans in sctp_do_8_2_transport_strike
2019-09-19 09:08:01 +02:00
smc
net/smc: make sure EPOLLOUT is raised
2019-09-06 10:20:50 +02:00
strparser
strparser: Remove early eaten to fix full tcp receive buffer stall
2018-07-22 14:28:47 +02:00
sunrpc
net :sunrpc :clnt :Fix xps refcount imbalance on the error path
2019-07-21 09:04:29 +02:00
switchdev
…
tipc
tipc: add NULL pointer check before calling kfree_rcu
2019-09-19 09:08:02 +02:00
tls
net/tls: Fixed return value when tls_complete_pending_work() fails
2018-12-05 19:41:11 +01:00
unix
missing barriers in some of unix_sock ->addr and ->path accesses
2019-03-19 13:13:24 +01:00
vmw_vsock
hv_sock: Fix hang when a connection is closed
2019-09-16 08:20:45 +02:00
wimax
…
wireless
Revert "cfg80211: fix processing world regdomain when non modular"
2019-09-06 10:20:59 +02:00
x25
net/x25: fix a race in x25_bind()
2019-03-19 13:13:23 +01:00
xfrm
xfrm: clean up xfrm protocol checks
2019-09-16 08:20:44 +02:00
compat.c
sock: Make sock->sk_stamp thread-safe
2019-01-09 17:14:46 +01:00
Kconfig
…
Makefile
…
socket.c
bpf: get rid of pure_initcall dependency to enable jits
2019-08-25 10:50:02 +02:00
sysctl_net.c
…