netdevsim netdevsim3 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim3 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim3 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 ================================================================== BUG: KCSAN: data-race in dev_get_tstats64 / iptunnel_xmit read-write to 0xffffe8ffffd44058 of 8 bytes by task 35 on cpu 1: iptunnel_xmit_stats include/net/ip_tunnels.h:459 [inline] iptunnel_xmit+0x3b7/0x490 net/ipv4/ip_tunnel_core.c:87 udp_tunnel_xmit_skb+0x15d/0x170 net/ipv4/udp_tunnel_core.c:171 send4+0x439/0x500 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0x92/0x120 drivers/net/wireguard/socket.c:175 wg_socket_send_buffer_to_peer+0xd2/0xf0 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x109/0x150 drivers/net/wireguard/send.c:51 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffffe8ffffd44058 of 8 bytes by task 1842 on cpu 0: dev_fetch_sw_netstats net/core/dev.c:10480 [inline] dev_get_tstats64+0x137/0x1d0 net/core/dev.c:10502 dev_get_stats+0x6a/0x2b0 net/core/dev.c:10432 rtnl_fill_stats+0x45/0x320 net/core/rtnetlink.c:1242 rtnl_fill_ifinfo+0xbff/0xfe0 net/core/rtnetlink.c:1819 rtmsg_ifinfo_build_skb+0xa2/0x130 net/core/rtnetlink.c:3908 rtmsg_ifinfo_event net/core/rtnetlink.c:3940 [inline] rtmsg_ifinfo+0x55/0xc0 net/core/rtnetlink.c:3949 __dev_notify_flags+0x65/0x3a0 net/core/dev.c:8571 dev_change_flags+0xa2/0xc0 net/core/dev.c:8613 do_setlink+0x778/0x2230 net/core/rtnetlink.c:2780 __rtnl_newlink net/core/rtnetlink.c:3546 [inline] rtnl_newlink+0x114c/0x16a0 net/core/rtnetlink.c:3593 rtnetlink_rcv_msg+0x811/0x8c0 net/core/rtnetlink.c:6089 netlink_rcv_skb+0x13e/0x240 net/netlink/af_netlink.c:2501 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6107 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x58a/0x660 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x666/0x760 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x21e/0x2c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0x74/0x90 net/socket.c:2127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000000000000000 -> 0x0000000000000094 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1842 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-01583-g7d0d3fa7339e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 ==================================================================