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Vasily Averin 2323690eb0 ipv6: allocate enough headroom in ip6_finish_output2() 
[ Upstream commit 5796015fa968a3349027a27dcd04c71d95c53ba5 ]

When TEE target mirrors traffic to another interface, sk_buff may
not have enough headroom to be processed correctly.
ip_finish_output2() detect this situation for ipv4 and allocates
new skb with enogh headroom. However ipv6 lacks this logic in
ip_finish_output2 and it leads to skb_under_panic:

 skbuff: skb_under_panic: text:ffffffffc0866ad4 len:96 put:24
 head:ffff97be85e31800 data:ffff97be85e317f8 tail:0x58 end:0xc0 dev:gre0
 ------------[ cut here ]------------
 kernel BUG at net/core/skbuff.c:110!
 invalid opcode: 0000 [#1] SMP PTI
 CPU: 2 PID: 393 Comm: kworker/2:2 Tainted: G           OE     5.13.0 #13
 Hardware name: Virtuozzo KVM, BIOS 1.11.0-2.vz7.4 04/01/2014
 Workqueue: ipv6_addrconf addrconf_dad_work
 RIP: 0010:skb_panic+0x48/0x4a
 Call Trace:
  skb_push.cold.111+0x10/0x10
  ipgre_header+0x24/0xf0 [ip_gre]
  neigh_connected_output+0xae/0xf0
  ip6_finish_output2+0x1a8/0x5a0
  ip6_output+0x5c/0x110
  nf_dup_ipv6+0x158/0x1000 [nf_dup_ipv6]
  tee_tg6+0x2e/0x40 [xt_TEE]
  ip6t_do_table+0x294/0x470 [ip6_tables]
  nf_hook_slow+0x44/0xc0
  nf_hook.constprop.34+0x72/0xe0
  ndisc_send_skb+0x20d/0x2e0
  ndisc_send_ns+0xd1/0x210
  addrconf_dad_work+0x3c8/0x540
  process_one_work+0x1d1/0x370
  worker_thread+0x30/0x390
  kthread+0x116/0x130
  ret_from_fork+0x22/0x30

Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-31 08:16:12 +02:00
..
6lowpan
…
9p
net: 9p: advance iov on empty read
2021-04-07 15:00:08 +02:00
802
net/802/garp: fix memleak in garp_request_join()
2021-07-31 08:16:11 +02:00
8021q
net: vlan: avoid leaks on register_vlan_dev() failures
2021-01-17 14:16:55 +01:00
appletalk
appletalk: Fix skb allocation size in loopback case
2021-04-07 15:00:08 +02:00
atm
net: atm: fix update of position index in lec_seq_next
2020-10-31 12:26:30 -07:00
ax25
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-07-25 17:49:04 -07:00
batman-adv
batman-adv: Avoid WARN_ON timing related checks
2021-06-23 14:42:41 +02:00
bluetooth
Bluetooth: mgmt: Fix the command returns garbage parameter value
2021-07-19 09:44:54 +02:00
bpf
bpf, test: fix NULL pointer dereference on invalid expected_attach_type
2021-07-28 14:35:37 +02:00
bpfilter
bpfilter: Specify the log level for the kmsg message
2021-07-14 16:56:29 +02:00
bridge
net: bridge: sync fdb to new unicast-filtering ports
2021-07-25 14:36:19 +02:00
caif
net: fix uninit-value in caif_seqpkt_sendmsg
2021-07-28 14:35:38 +02:00
can
can: j1939: j1939_sk_setsockopt(): prevent allocation of j1939 filter for optlen == 0
2021-07-14 16:56:27 +02:00
ceph
libceph: clear con->out_msg on Policy::stateful_server faults
2020-10-12 15:29:27 +02:00
core
net: annotate data race around sk_ll_usec
2021-07-31 08:16:11 +02:00
dcb
net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands
2021-01-23 16:04:01 +01:00
dccp
ipv6: weaken the v4mapped source check
2021-03-30 14:32:01 +02:00
decnet
net: decnet: Fix sleeping inside in af_decnet
2021-07-28 14:35:38 +02:00
dns_resolver
…
dsa
net: dsa: properly check for the bridge_leave methods in dsa_switch_bridge_leave()
2021-07-25 14:36:20 +02:00
ethernet
…
ethtool
net: ethtool: clear heap allocations for ethtool function
2021-06-30 08:47:20 -04:00
hsr
net: hsr: fix mac_len checks
2021-06-03 09:00:50 +02:00
ieee802154
net: ieee802154: fix null deref in parse dev addr
2021-06-18 10:00:03 +02:00
ife
…
ipv4
tcp: disable TFO blackhole logic by default
2021-07-28 14:35:41 +02:00
ipv6
ipv6: allocate enough headroom in ip6_finish_output2()
2021-07-31 08:16:12 +02:00
iucv
net/af_iucv: remove WARN_ONCE on malformed RX packets
2021-03-07 12:34:05 +01:00
kcm
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
key
af_key: relax availability checks for skb size calculation
2021-02-13 13:55:02 +01:00
l2tp
net: l2tp: reduce log level of messages in receive path, add counter instead
2021-03-17 17:06:11 +01:00
l3mdev
net: Fix some comments
2020-08-27 07:55:59 -07:00
lapb
net: lapb: Copy the skb before sending a packet
2021-02-10 09:29:14 +01:00
llc
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
mac80211
mac80211: consider per-CPU statistics if present
2021-07-19 09:44:53 +02:00
mac802154
net: mac802154: Fix general protection fault
2021-04-14 08:42:13 +02:00
mpls
net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0
2021-03-17 17:06:11 +01:00
mptcp
mptcp: fix warning in __skb_flow_dissect() when do syn cookie for subflow join
2021-07-28 14:35:34 +02:00
ncsi
net/ncsi: Avoid channel_monitor hrtimer deadlock
2021-04-14 08:42:08 +02:00
netfilter
netfilter: ctnetlink: suspicious RCU usage in ctnetlink_dump_helpinfo
2021-07-25 14:36:19 +02:00
netlabel
netlabel: Fix memory leak in netlbl_mgmt_add_common
2021-07-14 16:56:22 +02:00
netlink
netlink: disable IRQs for netlink_lock_table()
2021-06-16 12:01:36 +02:00
netrom
netrom: Decrease sock refcount when sock timers expire
2021-07-28 14:35:38 +02:00
nfc
net/nfc/rawsock.c: fix a permission check bug
2021-06-16 12:01:35 +02:00
nsh
…
openvswitch
openvswitch: meter: fix race when getting now_ms.
2021-06-03 09:00:47 +02:00
packet
net/packet: annotate accesses to po->ifindex
2021-06-30 08:47:22 -04:00
phonet
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
psample
net: psample: Fix netlink skb length with tunnel info
2021-03-07 12:34:07 +01:00
qrtr
net: qrtr: ns: Fix error return code in qrtr_ns_init()
2021-07-14 16:56:16 +02:00
rds
net: rds: fix memory leak in rds_recvmsg
2021-06-23 14:42:42 +02:00
rfkill
rfkill: Fix use-after-free in rfkill_resume()
2020-11-12 09:18:06 +01:00
rose
rose: Fix Null pointer dereference in rose_send_frame()
2020-11-20 10:04:58 -08:00
rxrpc
rxrpc: Fix clearance of Tx/Rx ring when releasing a call
2021-02-17 11:02:28 +01:00
sched
net: sched: cls_api: Fix the the wrong parameter
2021-07-28 14:35:41 +02:00
sctp
sctp: move 198 addresses from unusable to private scope
2021-07-31 08:16:11 +02:00
smc
net/smc: remove device from smcd_dev_list after failed device_add()
2021-06-03 09:00:48 +02:00
strparser
…
sunrpc
SUNRPC: prevent port reuse on transports which don't request it.
2021-07-20 16:05:51 +02:00
switchdev
net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP
2021-02-07 15:37:12 +01:00
tipc
net: tipc: fix FB_MTU eat two pages
2021-07-14 16:56:32 +02:00
tls
tls: prevent oversized sendfile() hangs by ignoring MSG_MORE
2021-07-14 16:56:24 +02:00
unix
af_unix: fix garbage collect vs MSG_PEEK
2021-07-31 08:16:11 +02:00
vmw_vsock
vsock: notify server to shutdown when client has pending signal
2021-07-19 09:44:52 +02:00
wimax
genetlink: move to smaller ops wherever possible
2020-10-02 19:11:11 -07:00
wireless
cfg80211: fix default HE tx bitrate mask in 2G band
2021-07-19 09:44:53 +02:00
x25
net/x25: Return the correct errno code
2021-06-18 10:00:06 +02:00
xdp
xsk: Fix broken Tx ring validation
2021-07-14 16:56:23 +02:00
xfrm
xfrm: Fix error reporting in xfrm_state_construct.
2021-07-19 09:44:49 +02:00
compat.c
net: Return the correct errno code
2021-06-18 10:00:06 +02:00
devres.c
…
Kconfig
drop_monitor: Convert to using devlink tracepoint
2020-09-30 18:01:26 -07:00
Makefile
…
socket.c
net: make get_net_ns return error if NET_NS is disabled
2021-06-23 14:42:44 +02:00
sysctl_net.c
…