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Davide Caratti 2b0e6d6bf0 net/sched: don't dereference a->goto_chain to read the chain index 
[ Upstream commit fe384e2fa3 ]

callers of tcf_gact_goto_chain_index() can potentially read an old value
of the chain index, or even dereference a NULL 'goto_chain' pointer,
because 'goto_chain' and 'tcfa_action' are read in the traffic path
without caring of concurrent write in the control path. The most recent
value of chain index can be read also from a->tcfa_action (it's encoded
there together with TC_ACT_GOTO_CHAIN bits), so we don't really need to
dereference 'goto_chain': just read the chain id from the control action.

Fixes: e457d86ada ("net: sched: add couple of goto_chain helpers")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
2019-05-04 09:20:18 +02:00
..
9p
9p: Embed wait_queue_head into p9_req_t
2018-08-13 09:21:44 +09:00
bluetooth
Bluetooth: Fix debugfs NULL pointer dereference
2019-04-20 09:16:01 +02:00
caif
…
iucv
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
netfilter
netfilter: nf_tables: bogus EBUSY when deleting set after flush
2019-05-02 09:58:51 +02:00
netns
netns: provide pure entropy for net_hash_mix()
2019-04-17 08:38:40 +02:00
nfc
NFC: Fix the number of pipes
2018-09-18 19:55:01 -07:00
phonet
phonet: fix building with clang
2019-03-23 20:09:51 +01:00
sctp
sctp: get sctphdr by offset in sctp_compute_cksum
2019-04-03 06:26:17 +02:00
tc_act
net/sched: don't dereference a->goto_chain to read the chain index
2019-05-04 09:20:18 +02:00
6lowpan.h
…
act_api.h
net_sched: remove unused tcfa_capab
2018-08-21 12:45:45 -07:00
addrconf.h
bpf: Introduce BPF_PROG_TYPE_SK_REUSEPORT
2018-08-11 01:58:46 +02:00
af_ieee802154.h
ieee802154: add rx LQI from userspace
2018-07-13 12:18:18 -04:00
af_rxrpc.h
rxrpc: Push iov_iter up from rxrpc_kernel_recv_data() to caller
2018-08-03 12:46:20 -07:00
af_unix.h
…
af_vsock.h
vsock: split dwork to avoid reinitializations
2018-08-07 12:39:13 -07:00
ah.h
…
arp.h
…
atmclip.h
…
ax25.h
ax25: fix possible use-after-free
2019-02-23 09:07:27 +01:00
ax88796.h
…
bond_3ad.h
include/net/bond_3ad: Simplify the code by using the ARRAY_SIZE
2018-08-04 13:23:15 -07:00
bond_alb.h
…
bond_options.h
…
bonding.h
bonding: avoid possible dead-lock
2018-09-26 20:22:19 -07:00
busy_poll.h
net: remove sock_poll_busy_flag
2018-07-30 09:10:25 -07:00
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
cfg80211: fix reg_query_regdb_wmm kernel-doc
2018-09-26 11:17:04 +02:00
cfg802154.h
…
checksum.h
…
cipso_ipv4.h
…
cls_cgroup.h
…
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
…
datalink.h
…
dcbevent.h
…
dcbnl.h
net: dcb: Add priority-to-DSCP map getters
2018-07-27 13:17:50 -07:00
devlink.h
devlink: Add helper function for safely copy string param
2018-10-10 10:19:10 -07:00
dn_dev.h
…
dn_fib.h
…
dn_neigh.h
…
dn_nsp.h
…
dn_route.h
…
dn.h
…
dsa.h
net: dsa: Remove VLA usage
2018-07-18 15:08:31 -07:00
dsfield.h
…
dst_cache.h
…
dst_metadata.h
…
dst_ops.h
…
dst.h
geneve, vxlan: Don't set exceptions if skb->len < mtu
2018-10-17 21:51:13 -07:00
erspan.h
erspan: set bso bit based on mirrored packet's len
2018-05-20 18:31:42 -04:00
esp.h
…
ethoc.h
…
failover.h
net: Introduce generic failover module
2018-05-28 22:59:54 -04:00
fib_notifier.h
…
fib_rules.h
…
firewire.h
…
flow_dissector.h
flow_dissector: allow dissection of tunnel options from metadata
2018-08-07 12:22:14 -07:00
flow.h
xfrm: Remove xfrmi interface ID from flowi
2018-07-20 10:14:41 +02:00
fou.h
…
fq_impl.h
…
fq.h
…
garp.h
…
gen_stats.h
net: core: protect rate estimator statistics pointer with lock
2018-08-11 12:37:10 -07:00
genetlink.h
…
geneve.h
…
gre.h
…
gro_cells.h
…
gtp.h
…
gue.h
…
hwbm.h
…
icmp.h
net: Add __icmp_send helper.
2019-03-10 07:17:19 +01:00
ieee80211_radiotap.h
radiotap: add structs for HE
2018-06-15 14:04:00 +02:00
ieee802154_netdev.h
…
if_inet6.h
net/ipv6: Add support for specifying metric of connected routes
2018-05-29 10:12:45 -04:00
ife.h
…
ila.h
…
inet6_connection_sock.h
…
inet6_hashtables.h
…
inet_common.h
net: Convert GRO SKB handling to list_head.
2018-06-26 11:33:04 +09:00
inet_connection_sock.h
inet/connection_sock: prefer _THIS_IP_ to current_text_addr
2018-08-14 10:04:36 -07:00
inet_ecn.h
…
inet_frag.h
net: IP defrag: encapsulate rbtree defrag code into callable functions
2019-04-27 09:36:33 +02:00
inet_hashtables.h
…
inet_sock.h
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-02 15:52:12 -07:00
inet_timewait_sock.h
net-tcp: remove useless tw_timeout field
2018-06-05 10:45:24 -04:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:07:24 +01:00
ip6_checksum.h
…
ip6_fib.h
ipv6: rate-limit probes for neighbourless routes
2018-10-15 22:18:27 -07:00
ip6_route.h
net/ipv6: Revert attempt to simplify route replace and append
2018-07-04 15:22:13 +09:00
ip6_tunnel.h
…
ip_fib.h
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:14:32 +01:00
ip_tunnels.h
ip: validate header length on virtual device xmit
2019-01-09 17:38:31 +01:00
ip_vs.h
ipvs: add assured state for conn templates
2018-07-18 11:26:40 +02:00
ip.h
vrf: check accept_source_route on the original netdevice
2019-04-17 08:38:42 +02:00
ipcomp.h
…
ipconfig.h
…
ipv6_frag.h
net: IP6 defrag: use rbtrees for IPv6 defrag
2019-04-27 09:36:33 +02:00
ipv6.h
net: don't declare IPv6 non-local bind helper if CONFIG_IPV6 undefined
2018-08-01 13:45:31 -07:00
ipx.h
…
iw_handler.h
…
kcm.h
…
l3mdev.h
ipvlan, l3mdev: fix broken l3s mode wrt local routes
2019-02-06 17:30:06 +01:00
lag.h
net: Add lag.h, net_lag_port_dev_txable()
2018-07-11 23:10:19 -07:00
lapb.h
…
lib80211.h
…
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
…
llc_if.h
…
llc_pdu.h
…
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: use refcount_inc_not_zero() for llc_sap_find()
2018-08-07 15:54:00 -07:00
lwtunnel.h
…
mac80211.h
mac80211: add support for HE
2018-06-18 22:40:32 +02:00
mac802154.h
…
mip6.h
…
mld.h
…
mpls_iptunnel.h
…
mpls.h
…
mrp.h
…
ncsi.h
…
ndisc.h
…
neighbour.h
neighbour: Avoid writing before skb->head in neigh_hh_output()
2018-12-17 09:24:27 +01:00
net_failover.h
net: Introduce net_failover driver
2018-05-28 22:59:54 -04:00
net_namespace.h
netns: provide pure entropy for net_hash_mix()
2019-04-17 08:38:40 +02:00
net_ratelimit.h
…
netevent.h
net: ipv4: Notify about changes to ip_forward_update_priority
2018-08-01 09:52:30 -07:00
netlabel.h
…
netlink.h
netlink: fix typo in nla_parse_nested() comment
2018-09-29 11:48:26 -07:00
netprio_cgroup.h
…
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-05-02 09:58:57 +02:00
nexthop.h
…
nl802154.h
…
nsh.h
…
p8022.h
…
page_pool.h
xdp: introduce xdp_return_frame_rx_napi
2018-05-24 18:36:15 -07:00
ping.h
ipv{4,6}/ping: simplify proc file creation
2018-05-16 07:23:35 +02:00
pkt_cls.h
net_sched: fix unused variable warning in stmmac
2018-08-22 21:40:21 -07:00
pkt_sched.h
net/sched: Add HW offloading capability to ETF
2018-07-04 22:30:27 +09:00
pptp.h
…
protocol.h
…
psample.h
…
psnap.h
…
raw.h
ipv{4,6}/raw: simplify ѕeq_file code
2018-05-16 07:23:35 +02:00
rawv6.h
…
red.h
…
regulatory.h
cfg80211: make wmm_rule part of the reg_rule structure
2018-08-28 11:11:47 +02:00
request_sock.h
…
rose.h
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
route.h
net/ipv4: Add support for specifying metric of connected routes
2018-05-29 10:12:45 -04:00
rsi_91x.h
…
rtnetlink.h
rtnetlink: Remove VLA usage
2018-05-31 22:48:46 -04:00
sch_generic.h
net: sched: put back q.qlen into a single location
2019-03-10 07:17:16 +01:00
scm.h
pids: Compute task_tgid using signal->leader_pid
2018-07-21 10:43:12 -05:00
secure_seq.h
…
seg6_hmac.h
rhashtable: split rhashtable.h
2018-06-22 13:43:27 +09:00
seg6_local.h
bpf: add End.DT6 action to bpf_lwt_seg6_action helper
2018-07-31 09:22:48 +02:00
seg6.h
rhashtable: split rhashtable.h
2018-06-22 13:43:27 +09:00
slhc_vj.h
…
smc.h
net/smc: add pnetid support for SMC-D and ISM
2018-06-30 20:42:25 +09:00
snmp.h
…
sock_reuseport.h
bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection
2018-08-11 01:58:46 +02:00
sock.h
packets: Always register packet sk in the same order
2019-04-03 06:26:17 +02:00
Space.h
…
stp.h
…
strparser.h
strparser: Add __strp_unpause and use it in ktls.
2018-06-06 14:07:53 -04:00
switchdev.h
…
tcp_states.h
…
tcp.h
tcp, ulp: add alias for all ulp modules
2018-08-16 14:58:07 -07:00
timewait_sock.h
…
tipc.h
flow_dissector: do not rely on implicit casts
2018-05-08 00:02:41 -04:00
tls.h
net/tls: prevent bad memory access in tls_is_sk_tx_device_offloaded()
2019-04-27 09:36:32 +02:00
transp_v6.h
ipv6: fold sockcm_cookie into ipcm6_cookie
2018-07-07 10:58:49 +09:00
tso.h
…
tun_proto.h
…
udp_tunnel.h
net: Convert GRO SKB handling to list_head.
2018-06-26 11:33:04 +09:00
udp.h
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
udplite.h
…
vsock_addr.h
…
vxlan.h
…
wext.h
…
wimax.h
…
x25.h
…
x25device.h
…
xdp_sock.h
xsk: fix umem memory leak on cleanup
2019-05-04 09:20:12 +02:00
xdp.h
xdp: Helper function to clear kernel pointers in xdp_frame
2018-08-10 16:12:20 +02:00
xfrm.h
xfrm: destroy xfrm_state synchronously on net exit path
2019-04-20 09:16:03 +02:00