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Willem de Bruijn cde81154f8 ip: validate header length on virtual device xmit 
[ Upstream commit cb9f1b7838 ]

KMSAN detected read beyond end of buffer in vti and sit devices when
passing truncated packets with PF_PACKET. The issue affects additional
ip tunnel devices.

Extend commit 76c0ddd8c3 ("ip6_tunnel: be careful when accessing the
inner header") and commit ccfec9e5cb ("ip_tunnel: be careful when
accessing the inner header").

Move the check to a separate helper and call at the start of each
ndo_start_xmit function in net/ipv4 and net/ipv6.

Minor changes:
- convert dev_kfree_skb to kfree_skb on error path,
  as dev_kfree_skb calls consume_skb which is not for error paths.
- use pskb_network_may_pull even though that is pedantic here,
  as the same as pskb_may_pull for devices without llheaders.
- do not cache ipv6 hdrs if used only once
  (unsafe across pskb_may_pull, was more relevant to earlier patch)

Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-09 17:38:31 +01:00
..
9p
9p: Embed wait_queue_head into p9_req_t
2018-08-13 09:21:44 +09:00
bluetooth
Bluetooth: Add definitions for LE set address resolution
2018-08-10 16:57:57 +02:00
caif
caif: reduce stack size with KASAN
2018-01-19 14:02:12 -05:00
iucv
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
netfilter
netfilter: add missing error handling code for register functions
2018-12-17 09:24:36 +01:00
netns
ipv6: Add icmp_echo_ignore_all support for ICMPv6
2018-08-13 08:42:25 -07:00
nfc
NFC: Fix the number of pipes
2018-09-18 19:55:01 -07:00
phonet
proc: introduce proc_create_net{,_data}
2018-05-16 07:24:30 +02:00
sctp
sctp: kfree_rcu asoc
2018-12-17 09:24:28 +01:00
tc_act
Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux
2018-07-20 21:17:12 -07:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
af_vsock.h
vsock: split dwork to avoid reinitializations
2018-08-07 12:39:13 -07:00
ah.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
arp.h
ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY
2018-01-15 14:53:43 -05:00
atmclip.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ax25.h
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
ax88796.h
net-next: ax88796: add interrupt status callback to platform data
2018-04-19 16:11:11 -04:00
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
net: remove compat_sys_*() prototypes from net/compat.h
2018-04-02 20:16:17 +02:00
datalink.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_fib.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_neigh.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_nsp.h
…
dn_route.h
decnet: Move dn_next into decnet route structure.
2017-11-30 09:54:25 -05:00
dn.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
dsa.h
net: dsa: Remove VLA usage
2018-07-18 15:08:31 -07:00
dsfield.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dst_cache.h
net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency
2018-03-05 12:52:45 -05:00
dst_metadata.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
dst_ops.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ethoc.h
inet: whitespace cleanup
2018-02-28 11:43:28 -05:00
failover.h
net: Introduce generic failover module
2018-05-28 22:59:54 -04:00
fib_notifier.h
…
fib_rules.h
net: fib_rules: add extack support
2018-04-23 10:21:24 -04:00
firewire.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fq_impl.h
…
fq.h
…
garp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gen_stats.h
net: core: protect rate estimator statistics pointer with lock
2018-08-11 12:37:10 -07:00
genetlink.h
genetlink: fix genlmsg_nlhdr()
2017-11-16 10:49:00 +09:00
geneve.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gre.h
net: GRE: Add is_gretap_dev, is_ip6gretap_dev
2018-02-27 14:46:26 -05:00
gro_cells.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gtp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gue.h
fou: fix some member types in guehdr
2017-12-11 14:10:06 -05:00
hwbm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
icmp.h
…
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
net: sched: ife: handle malformed tlv length
2018-04-22 21:12:00 -04:00
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
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
inet_frag.h
ip: add helpers to process in-order fragments faster.
2018-08-11 17:54:18 -07:00
inet_hashtables.h
inet: Add a 2nd listener hashtable (port+addr)
2017-12-03 10:18:28 -05:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +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
ip6_gre: add erspan v2 support
2017-12-15 12:34:00 -05:00
ip_fib.h
net: ipv4: update fnhe_pmtu when first hop's MTU changes
2018-10-10 22:44:46 -07:00
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
ip: remove tx_flags from ipcm_cookie and use same logic for v4 and v6
2018-07-07 10:58:49 +09:00
ipcomp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipconfig.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipv6_frag.h
ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module
2018-07-18 11:26:53 +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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iw_handler.h
net: Spelling s/stucture/structure/
2018-03-27 09:51:23 +02:00
kcm.h
…
l3mdev.h
…
lag.h
net: Add lag.h, net_lag_port_dev_txable()
2018-07-11 23:10:19 -07:00
lapb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
lib80211.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
llc: delete timers synchronously in llc_sk_free()
2018-04-22 14:55:03 -04:00
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
net: Move ipv4 set_lwt_redirect helper to lwtunnel
2018-02-14 14:43:32 -05:00
mac80211.h
mac80211: add support for HE
2018-06-18 22:40:32 +02:00
mac802154.h
…
mip6.h
…
mld.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mpls_iptunnel.h
…
mpls.h
…
mrp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ncsi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ndisc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
net: create reusable function for getting ownership info of sysfs inodes
2018-07-20 23:44:36 -07:00
net_ratelimit.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
nexthop.h
net: fix rtnh_ok()
2018-04-07 22:32:31 -04:00
nl802154.h
…
nsh.h
openvswitch: enable NSH support
2017-11-08 16:12:33 +09:00
p8022.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
protocol.h
…
psample.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
psnap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raw.h
ipv{4,6}/raw: simplify ѕeq_file code
2018-05-16 07:23:35 +02:00
rawv6.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
red.h
net_sched: red: Avoid illegal values
2017-12-05 14:37:13 -05:00
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
Bluetooth: btrsi: add new rsi bluetooth driver
2018-03-13 18:37:02 +02:00
rtnetlink.h
rtnetlink: Remove VLA usage
2018-05-31 22:48:46 -04:00
sch_generic.h
net/tc: introduce TC_ACT_REINSERT.
2018-07-30 09:31:14 -07:00
scm.h
pids: Compute task_tgid using signal->leader_pid
2018-07-21 10:43:12 -05:00
secure_seq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
slip: Check if rstate is initialized before uncompressing
2018-04-11 10:33:46 -04:00
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
tcp: do not release socket ownership in tcp_close()
2018-12-01 09:37:28 +01:00
Space.h
net/mac89x0: Convert to platform_driver
2018-03-01 21:21:36 -05:00
stp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
strparser.h
strparser: Add __strp_unpause and use it in ktls.
2018-06-06 14:07:53 -04:00
switchdev.h
switchdev: Add fdb.added_by_user to switchdev notifications
2018-05-03 13:46:47 -04:00
tcp_states.h
tcp: remove the hardcode in the definition of TCPF Macro
2018-02-21 15:06:05 -05:00
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
tls: zero the crypto information from tls_context before freeing
2018-09-13 12:03:47 -07:00
transp_v6.h
ipv6: fold sockcm_cookie into ipcm6_cookie
2018-07-07 10:58:49 +09:00
tso.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
udplite: fix partial checksum initialization
2018-02-16 15:57:42 -05:00
vsock_addr.h
…
vxlan.h
vxlan: add ttl inherit support
2018-04-17 13:53:13 -04:00
wext.h
lift handling of SIOCIW... out of dev_ioctl()
2018-01-24 19:13:45 -05:00
wimax.h
…
x25.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
x25device.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xdp_sock.h
xsk: fix potential race in SKB TX completion code
2018-07-02 18:37:12 -07:00
xdp.h
xdp: Helper function to clear kernel pointers in xdp_frame
2018-08-10 16:12:20 +02:00
xfrm.h
xfrm_user: fix freeing of xfrm states on acquire
2018-12-29 13:37:58 +01:00