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linux/net
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Breno Leitao 3f1a155950 netpoll: Fix race condition in netpoll_owner_active 
[ Upstream commit c2e6a872bd ]

KCSAN detected a race condition in netpoll:

	BUG: KCSAN: data-race in net_rx_action / netpoll_send_skb
	write (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:
	net_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)
<snip>
	read to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2:
	netpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393)
	netpoll_send_udp (net/core/netpoll.c:?)
<snip>
	value changed: 0x0000000a -> 0xffffffff

This happens because netpoll_owner_active() needs to check if the
current CPU is the owner of the lock, touching napi->poll_owner
non atomically. The ->poll_owner field contains the current CPU holding
the lock.

Use an atomic read to check if the poll owner is the current CPU.

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240429100437.3487432-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-27 13:49:02 +02:00
..
6lowpan
9p net/9p: fix uninit-value in p9_client_rpc() 2024-06-16 13:47:41 +02:00
802
8021q net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-17 12:02:07 +02:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:01:50 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:01:48 +01:00
ax25 ax25: Replace kfree() in ax25_dev_free() with ax25_dev_put() 2024-06-21 14:38:14 +02:00
batman-adv batman-adv: bypass empty buckets in batadv_purge_orig_ref() 2024-06-27 13:49:01 +02:00
bluetooth Bluetooth: fix connection setup in l2cap_connect 2024-06-21 14:38:34 +02:00
bpf bpf: Set run context for rawtp test_run callback 2024-06-21 14:38:16 +02:00
bpfilter
bridge net: bridge: mst: fix suspicious rcu usage in br_mst_set_state 2024-06-21 14:38:36 +02:00
caif
can can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER) 2024-02-23 09:25:17 +01:00
ceph libceph: fail sparse-read if the data length doesn't match 2024-03-01 13:34:56 +01:00
core netpoll: Fix race condition in netpoll_owner_active 2024-06-27 13:49:02 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2023-11-20 11:59:35 +01:00
devlink devlink: fix port new reply cmd type 2024-03-26 18:20:11 -04:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:35:41 -08:00
dsa net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:32:46 +02:00
ethtool net: ethtool: fix the error condition in ethtool_get_phy_stats_ethtool() 2024-06-21 14:38:20 +02:00
handshake net/handshake: Fix handshake_req_destroy_test1 2024-02-23 09:24:50 +01:00
hsr hsr: Simplify code for announcing HSR nodes timer setup 2024-05-17 12:02:24 +02:00
ieee802154 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:42:30 +00:00
ipv4 tcp: count CLOSE-WAIT sockets for TCP_MIB_CURRESTAB 2024-06-21 14:38:17 +02:00
ipv6 net/ipv6: Fix the RT cache flush via sysctl using a previous delay 2024-06-21 14:38:35 +02:00
iucv net/iucv: fix the allocation size of iucv_path_table array 2024-03-26 18:19:12 -04:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-26 18:19:40 -04:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp net l2tp: drop flow hash on forward 2024-05-17 12:02:02 +02:00
l3mdev
lapb
llc llc: call sock_orphan() at release time 2024-02-05 20:14:36 +00:00
mac80211 wifi: mac80211: correctly parse Spatial Reuse Parameter Set element 2024-06-21 14:38:13 +02:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:28:27 +02:00
mctp net: mctp: copy skb ext data when fragmenting 2024-03-26 18:19:34 -04:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:07:41 +02:00
mptcp mptcp: pm: update add_addr counters after connect 2024-06-21 14:38:38 +02:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-06-21 14:38:14 +02:00
netfilter netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type 2024-06-21 14:38:34 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:35:14 -08:00
netlink netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter 2024-03-06 14:48:34 +00:00
netrom netrom: fix possible dead-lock in nr_rt_ioctl() 2024-06-12 11:12:12 +02:00
nfc nfc: nci: Fix handling of zero-length payload packets in nci_rx_work() 2024-06-12 11:12:51 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 12:02:02 +02:00
openvswitch openvswitch: Set the skbuff pkt_type for proper pmtud support. 2024-06-12 11:12:49 +02:00
packet af_packet: avoid a false positive warning in packet_setsockopt() 2024-06-27 13:49:01 +02:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 12:02:22 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:45:10 +01:00
qrtr net: qrtr: ns: Fix module refcnt 2024-06-12 11:12:12 +02:00
rds net/rds: fix possible cp null dereference 2024-04-10 16:35:49 +02:00
rfkill net: rfkill: gpio: set GPIO direction 2024-01-01 12:42:41 +00:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:42:31 +00:00
rxrpc rxrpc: Only transmit one ACK per jumbo packet received 2024-05-17 12:02:23 +02:00
sched net/sched: fix false lockdep warning on qdisc root lock 2024-06-27 13:49:02 +02:00
sctp sctp: fix busy polling 2024-01-25 15:35:30 -08:00
smc net/smc: avoid overwriting when adjusting sock bufsizes 2024-06-21 14:38:16 +02:00
strparser
sunrpc SUNRPC: return proper error from gss_wrap_req_priv 2024-06-21 14:38:28 +02:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:35:06 +01:00
tipc tipc: fix UAF in error path 2024-05-17 12:02:32 +02:00
tls tls: fix missing memory barrier in tls_init 2024-06-12 11:12:50 +02:00
unix af_unix: Read with MSG_PEEK loops if the first unread byte is OOB 2024-06-21 14:38:36 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:35:50 +02:00
wireless wifi: cfg80211: pmsr: use correct nla_get_uX functions 2024-06-21 14:38:12 +02:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:19:41 -04:00
xdp xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING 2024-04-17 11:19:28 +02:00
xfrm net: fix __dst_negative_advice() race 2024-06-16 13:47:44 +02:00
compat.c
devres.c
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug
Makefile
socket.c net: Save and restore msg_namelen in sock_sendmsg 2024-01-10 17:16:51 +01:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00