batman_adv: batadv0: Interface activated: batadv_slave_1 ================================================================== BUG: KCSAN: data-race in dev_get_tstats64 / udp_tunnel6_xmit_skb write to 0xffffe8ffffd756f0 of 8 bytes by task 1915 on cpu 1: iptunnel_xmit_stats include/net/ip_tunnels.h:453 [inline] ip6tunnel_xmit include/net/ip6_tunnel.h:166 [inline] udp_tunnel6_xmit_skb+0x3ce/0x4d0 net/ipv6/ip6_udp_tunnel.c:109 send6+0x2f1/0x3b0 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0xbb/0x130 drivers/net/wireguard/socket.c:177 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x142/0x360 drivers/net/wireguard/send.c:276 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307 worker_thread+0x616/0xa70 kernel/workqueue.c:2454 kthread+0x1bf/0x1e0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 read to 0xffffe8ffffd756f0 of 8 bytes by task 25788 on cpu 0: dev_fetch_sw_netstats net/core/dev.c:10058 [inline] dev_get_tstats64+0x13a/0x1e0 net/core/dev.c:10081 dev_get_stats+0x65/0x180 net/core/dev.c:10023 rtnl_fill_stats+0x45/0x320 net/core/rtnetlink.c:1203 rtnl_fill_ifinfo+0xf1e/0x25c0 net/core/rtnetlink.c:1778 rtmsg_ifinfo_build_skb+0xa8/0x130 net/core/rtnetlink.c:3837 rtmsg_ifinfo_event net/core/rtnetlink.c:3869 [inline] rtmsg_ifinfo+0x58/0xc0 net/core/rtnetlink.c:3878 __dev_notify_flags+0x63/0x3b0 net/core/dev.c:8173 dev_change_flags+0xa2/0xc0 net/core/dev.c:8215 do_setlink+0x820/0x2500 net/core/rtnetlink.c:2731 __rtnl_newlink net/core/rtnetlink.c:3416 [inline] rtnl_newlink+0xfeb/0x13e0 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x745/0x7e0 net/core/rtnetlink.c:5596 netlink_rcv_skb+0x14e/0x250 net/netlink/af_netlink.c:2494 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:5614 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x602/0x6d0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x728/0x850 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] __sys_sendto+0x21e/0x2c0 net/socket.c:2040 __do_sys_sendto net/socket.c:2052 [inline] __se_sys_sendto net/socket.c:2048 [inline] __x64_sys_sendto+0x74/0x90 net/socket.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000000 -> 0x0000000000000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25788 Comm: syz-executor.3 Not tainted 5.17.0-rc7-syzkaller-00205-g79b00034e9dc-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== syz-executor.3 (25788) used greatest stack depth: 9376 bytes left