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linux/net
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Oliver Hartkopp d840c84cdd can: statistics: use atomic access in hot path 
[ Upstream commit 80b5f90158 ]

In can_send() and can_receive() CAN messages and CAN filter matches are
counted to be visible in the CAN procfs files.

KCSAN detected a data race within can_send() when two CAN frames have
been generated by a timer event writing to the same CAN netdevice at the
same time. Use atomic operations to access the statistics in the hot path
to fix the KCSAN complaint.

Reported-by: syzbot+78ce4489b812515d5e4d@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/67cd717d.050a0220.e1a89.0006.GAE@google.com
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://patch.msgid.link/20250310143353.3242-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-04-10 14:39:31 +02:00
..
6lowpan ipv6: eliminate ndisc_ops_is_useropt() 2024-08-12 17:23:57 -07:00
9p 9p/xen: fix release of IRQ 2024-12-05 14:03:06 +01:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:40:37 +01:00
8021q vlan: enforce underlying device type 2025-03-13 13:02:08 +01:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
atm atm: Fix NULL pointer dereference 2025-04-07 10:08:35 +02:00
ax25 ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt 2025-02-21 14:01:16 +01:00
batman-adv batman-adv: Ignore own maximum aggregation size during RX 2025-03-28 22:03:31 +01:00
bluetooth Bluetooth: Fix error code in chan_alloc_skb_cb() 2025-03-28 22:03:27 +01:00
bpf bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() 2025-02-27 04:30:18 -08:00
bridge ipv4: Convert ip_route_input() to dscp_t. 2025-03-07 18:25:29 +01:00
caif move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
can can: statistics: use atomic access in hot path 2025-04-10 14:39:31 +02:00
ceph ceph: allocate sparse_ext map only for sparse reads 2025-01-02 10:34:09 +01:00
core net: devmem: do not WARN conditionally after netdev_rx_queue_restart() 2025-04-10 14:39:31 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp dccp: Fix memory leak in dccp_feat_change_recv 2024-12-14 20:03:05 +01:00
devlink devlink: fix xa_alloc_cyclic() error handling 2025-03-28 22:03:27 +01:00
dns_resolver Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
dsa net: dsa: restore dsa_software_vlan_untag() ability to operate on VLAN-untagged traffic 2024-12-27 14:02:05 +01:00
ethernet netkit: Fix pkt_type override upon netkit pass verdict 2024-05-25 10:48:57 -07:00
ethtool net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device 2025-03-13 13:02:08 +01:00
handshake net/handshake: use sockfd_put() helper 2024-08-27 16:09:25 -07:00
hsr net: hsr: fix fill_frame_info() regression vs VLAN packets 2025-02-08 09:58:08 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 20:03:47 +01:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 net-timestamp: support TCP GSO case for a few missing flags 2025-03-13 13:02:08 +01:00
ipv6 netfilter: socket: Lookup orig tuple for IPv6 SNAT 2025-04-07 10:08:35 +02:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-05 14:02:31 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-19 18:36:12 -07:00
key xfrm: Add support for per cpu xfrm state handling. 2025-02-08 09:58:00 +01:00
l2tp net/l2tp: fix warning in l2tp_exit_net found by syzbot 2024-12-05 14:02:31 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: do not use skb_get() before dev_queue_xmit() 2025-03-13 13:02:05 +01:00
mac80211 wifi: mac80211: fix SA Query processing in MLO 2025-04-10 14:39:30 +02:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:22:54 +01:00
mctp net: mctp: unshare packets when reassembling 2025-03-22 12:54:13 -07:00
mpls mpls: Handle error of rtnl_register_module(). 2024-10-10 15:39:35 +02:00
mptcp mptcp: Fix data stream corruption in the address announcement 2025-03-28 22:03:33 +01:00
ncsi net/ncsi: wait for the last response to Deselect Package before configuring channel 2025-02-17 10:05:41 +01:00
netfilter netfilter: nft_exthdr: fix offset with ipv4_find_option() 2025-03-22 12:54:13 -07:00
netlabel netlabel: fix RCU annotation for IPv4 options on socket creation 2024-05-13 14:58:12 -07:00
netlink netlink: fix false positive warning in extack during dumps 2024-12-05 14:02:31 +01:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:33:38 +01:00
nfc NFC: nci: Add bounds checking in nci_hci_create_pipe() 2025-02-17 10:05:40 +01:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-04-26 12:20:01 +02:00
openvswitch Revert "openvswitch: switch to per-action label counting in conntrack" 2025-03-22 12:54:13 -07:00
packet af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK 2025-01-09 13:33:42 +01:00
phonet phonet: Handle error of rtnl_register_module(). 2024-10-10 15:39:36 +02:00
psample psample: adjust size if rate_as_probability is set 2024-12-27 14:02:06 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-09-24 10:48:16 +02:00
rds rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current->nsproxy 2025-01-17 13:40:47 +01:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-05 14:01:57 +01:00
rose net: rose: lock the socket in rose_bind() 2025-02-17 10:05:01 +01:00
rxrpc rxrpc: rxperf: Fix missing decoding of terminal magic cookie 2025-03-07 18:25:29 +01:00
sched net_sched: Prevent creation of classes with TC_H_ROOT 2025-03-22 12:54:13 -07:00
sctp sctp: Fix undefined behavior in left shift operation 2025-03-22 12:54:19 -07:00
smc net/smc: fix data error when recvmsg with MSG_PEEK flag 2025-02-08 09:57:16 +01:00
strparser strparser: Add read_sock callback 2025-02-27 04:30:19 -08:00
sunrpc sunrpc: suppress warnings for unused procfs functions 2025-03-07 18:25:28 +01:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-22 12:54:12 -07:00
tipc tipc: re-order conditions in tipc_crypto_key_rcv() 2025-02-17 10:04:53 +01:00
tls tls: Fix tls_sw_sendmsg error handling 2025-01-17 13:40:38 +01:00
unix splice: do not checksum AF_UNIX sockets 2024-12-19 18:12:59 +01:00
vmw_vsock vsock/bpf: Warn on socket without transport 2025-02-27 04:30:17 -08:00
wireless wifi: cfg80211: cancel wiphy_work before freeing wiphy 2025-03-22 12:54:10 -07:00
x25 net: change proto and proto_ops accept type 2024-05-13 18:19:09 -06:00
xdp xsk: fix an integer overflow in xp_create_and_assign_umem() 2025-03-28 22:03:31 +01:00
xfrm xfrm_output: Force software GSO only in tunnel mode 2025-03-28 22:03:25 +01:00
compat.c file: stop exposing receive_fd_user() 2023-12-12 14:24:14 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig memory-provider: disable building dmabuf mp on !CONFIG_PAGE_POOL 2024-09-13 11:41:45 -07:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile af_unix: Remove CONFIG_UNIX_SCM. 2024-01-31 16:41:16 -08:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-07 16:21:59 -07:00
sysctl_net.c sysctl: Remove check for sentinel element in ctl_table arrays 2024-06-13 10:50:52 +02:00