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Baowen Zheng 963178a063 flow_offload: fix suspicious RCU usage when offloading tc action 
Fix suspicious rcu_dereference_protected() usage when offloading tc action.

We should hold tcfa_lock to offload tc action in action initiation.

Without these changes, the following warning will be observed:

WARNING: suspicious RCU usage
5.16.0-rc5-net-next-01504-g7d1f236dcffa-dirty #50 Tainted: G          I
-----------------------------
include/net/tc_act/tc_tunnel_key.h:33 suspicious rcu_dereference_protected() usage!
1 lock held by tc/12108:
CPU: 4 PID: 12108 Comm: tc Tainted: G
Hardware name: Dell Inc. PowerEdge R740/07WCGN, BIOS 1.6.11 11/20/2018
Call Trace:
<TASK>
dump_stack_lvl+0x49/0x5e
dump_stack+0x10/0x12
lockdep_rcu_suspicious+0xed/0xf8
tcf_tunnel_key_offload_act_setup+0x1de/0x300 [act_tunnel_key]
tcf_action_offload_add_ex+0xc0/0x1f0
tcf_action_init+0x26a/0x2f0
tcf_action_add+0xa9/0x1f0
tc_ctl_action+0xfb/0x170
rtnetlink_rcv_msg+0x169/0x510
? sched_clock+0x9/0x10
? rtnl_newlink+0x70/0x70
netlink_rcv_skb+0x55/0x100
rtnetlink_rcv+0x15/0x20
netlink_unicast+0x1a8/0x270
netlink_sendmsg+0x245/0x490
sock_sendmsg+0x65/0x70
____sys_sendmsg+0x219/0x260
? __import_iovec+0x2c/0x150
___sys_sendmsg+0xb7/0x100
? __lock_acquire+0x3d5/0x1f40
? __this_cpu_preempt_check+0x13/0x20
? lock_is_held_type+0xe4/0x140
? sched_clock+0x9/0x10
? ktime_get_coarse_real_ts64+0xbe/0xd0
? __this_cpu_preempt_check+0x13/0x20
? lockdep_hardirqs_on+0x7e/0x100
? ktime_get_coarse_real_ts64+0xbe/0xd0
? trace_hardirqs_on+0x2a/0xf0
__sys_sendmsg+0x5a/0xa0
? syscall_trace_enter.constprop.0+0x1dd/0x220
__x64_sys_sendmsg+0x1f/0x30
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4db7bb7a60

Fixes: 8cbfe939ab ("flow_offload: allow user to offload tc action to net device")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2021-12-23 11:17:00 +00:00
..
6lowpan
…
9p 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
802 net: 802: Use memset_startat() to clear struct fields 2021-11-19 11:23:23 +00:00
8021q vlan: add net device refcount tracker 2021-12-07 20:44:58 -08:00
appletalk
…
atm net: atm: use address setting helpers 2021-10-24 13:59:45 +01:00
ax25 ax25: add net device refcount tracker 2021-12-07 20:44:59 -08:00
batman-adv Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
bluetooth bluetooth-next pull request for net-next: 2021-11-17 14:52:44 +00:00
bpf bpf: Add dummy BPF STRUCT_OPS for test purpose 2021-11-01 14:10:00 -07:00
bpfilter
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bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2021-12-15 17:29:28 -08:00
caif net: caif: get ready for const netdev->dev_addr 2021-10-24 13:59:45 +01:00
can can: j1939: j1939_tp_cmd_recv(): check the dst address of TP.CM_BAM 2021-11-06 17:29:32 +01:00
ceph libceph, ceph: move ceph_osdc_copy_from() into cephfs code 2021-11-08 03:29:52 +01:00
core devlink: Add new "event_eq_size" generic device param 2021-12-21 19:08:54 -08:00
dcb
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dccp dccp: Inline dccp_listen_start(). 2021-11-23 20:16:22 -08:00
decnet fib: rules: remove duplicated nla policies 2021-12-16 07:18:35 -08:00
dns_resolver
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dsa net: dsa: make tagging protocols connect to individual switches from a tree 2021-12-14 12:45:16 +00:00
ethernet gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2021-11-24 17:21:42 -08:00
ethtool ethtool: always write dev in ethnl_parse_header_dev_get 2021-12-15 15:09:24 +00:00
hsr net: Write lock dev_base_lock without disabling bottom halves. 2021-11-29 12:12:36 +00:00
ieee802154 net: drop nopreempt requirement on sock_prot_inuse_add() 2021-11-16 13:20:45 +00:00
ife
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ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
ipv6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
iucv net/af_iucv: Use struct_group() to zero struct iucv_sock region 2021-11-19 11:52:25 +00:00
kcm
…
key
…
l2tp l2tp: add netns refcount tracker to l2tp_dfs_seq_data 2021-12-10 06:38:27 -08:00
l3mdev
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lapb
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llc sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned. 2021-12-10 19:43:00 -08:00
mac80211 This time we have: 2021-12-21 07:41:52 -08:00
mac802154 mac802154: use dev_addr_set() - manual 2021-10-20 14:27:40 +01:00
mctp mctp: emit RTM_NEWADDR and RTM_DELADDR 2021-12-20 18:40:48 -08:00
mpls Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-02 11:44:56 -08:00
mptcp mptcp: clean up harmless false expressions 2021-12-17 19:27:05 -08:00
ncsi net/ncsi : Add payload to be 32-bit aligned to fix dropped packets 2021-11-24 11:53:17 +00:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2021-12-15 17:29:28 -08:00
netlabel net: fix NULL pointer reference in cipso_v4_doi_free 2021-08-30 12:23:18 +01:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-02 11:44:56 -08:00
netrom ax25: constify dev_addr passing 2021-10-13 09:40:45 -07:00
nfc nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done 2021-12-09 07:50:32 -08:00
nsh
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openvswitch openvswitch: add net device refcount tracker to struct vport 2021-12-07 20:45:00 -08:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
phonet phonet: refcount leak in pep_sock_accep 2021-12-10 19:53:52 -08:00
psample
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qrtr net: qrtr: combine nameservice into main module 2021-09-28 17:36:43 -07:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
rfkill rfkill: allow to get the software rfkill state 2021-12-20 11:02:38 +01:00
rose rose: constify dev_addr passing 2021-10-13 09:40:45 -07:00
rxrpc rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() 2021-11-29 15:40:02 +00:00
sched flow_offload: fix suspicious RCU usage when offloading tc action 2021-12-23 11:17:00 +00:00
sctp sctp: move hlist_node and hashent out of sctp_ep_common 2021-12-23 11:15:30 +00:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
strparser bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding 2021-11-09 01:05:28 +01:00
sunrpc NFS client bugfixes for Linux 5.16 2021-11-27 10:33:55 -08:00
switchdev net: switchdev: add net device refcount tracker 2021-12-07 20:44:58 -08:00
tipc net: add net device refcount tracker to struct packet_type 2021-12-15 15:07:04 +00:00
tls Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-02 11:44:56 -08:00
unix net: Enable max_dgram_qlen unix sysctl to be configurable by non-init user namespaces 2021-12-13 12:47:47 +00:00
vmw_vsock Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
wireless This time we have: 2021-12-21 07:41:52 -08:00
x25 net: x25: drop harmless check of !more 2021-12-09 18:35:11 -08:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
xfrm xfrm: add net device refcount tracker to struct xfrm_state_offload 2021-12-10 08:16:33 -08:00
Kconfig net: kunit: add a test for dev_addr_lists 2021-11-20 12:25:57 +00:00
Kconfig.debug net: add networking namespace refcount tracker 2021-12-10 06:38:26 -08:00
Makefile
…
compat.c
…
devres.c
…
socket.c Core: 2021-08-31 16:43:06 -07:00
sysctl_net.c sections: move and rename core_kernel_data() to is_kernel_core_data() 2021-11-09 10:02:50 -08:00