syzbot

batman_adv: batadv0: Interface activated: batadv_slave_1
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BUG: KCSAN: data-race in dev_get_tstats64 / wg_packet_rx_poll

write to 0xffffe8ffffc60748 of 8 bytes by interrupt on cpu 0:
 update_rx_stats drivers/net/wireguard/receive.c:27 [inline]
 wg_packet_consume_data_done drivers/net/wireguard/receive.c:364 [inline]
 wg_packet_rx_poll+0xf59/0x11f0 drivers/net/wireguard/receive.c:480
 __napi_poll+0x65/0x3f0 net/core/dev.c:7020
 napi_poll net/core/dev.c:7087 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:7174
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 do_softirq+0xb1/0xf0 kernel/softirq.c:459
 __local_bh_enable_ip+0x68/0x70 kernel/softirq.c:383
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x33/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:394 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
 wg_packet_decrypt_worker+0x73c/0x780 drivers/net/wireguard/receive.c:505
 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298
 worker_thread+0x616/0xa70 kernel/workqueue.c:2445
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

read to 0xffffe8ffffc60748 of 8 bytes by task 21252 on cpu 1:
 dev_fetch_sw_netstats net/core/dev.c:10722 [inline]
 dev_get_tstats64+0x126/0x1e0 net/core/dev.c:10746
 dev_get_stats+0x65/0x180 net/core/dev.c:10688
 rtnl_fill_stats+0x45/0x320 net/core/rtnetlink.c:1202
 rtnl_fill_ifinfo+0xebf/0x2560 net/core/rtnetlink.c:1774
 rtmsg_ifinfo_build_skb+0xa8/0x130 net/core/rtnetlink.c:3812
 rtmsg_ifinfo_event net/core/rtnetlink.c:3844 [inline]
 rtmsg_ifinfo+0x58/0xc0 net/core/rtnetlink.c:3853
 __dev_notify_flags+0x63/0x3b0 net/core/dev.c:8827
 dev_change_flags+0xa2/0xc0 net/core/dev.c:8869
 do_setlink+0x810/0x2410 net/core/rtnetlink.c:2719
 __rtnl_newlink net/core/rtnetlink.c:3391 [inline]
 rtnl_newlink+0xfad/0x13b0 net/core/rtnetlink.c:3506
 rtnetlink_rcv_msg+0x745/0x7e0 net/core/rtnetlink.c:5571
 netlink_rcv_skb+0x14e/0x250 net/netlink/af_netlink.c:2491
 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:5589
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x5fc/0x6c0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x6e1/0x7d0 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 __sys_sendto+0x21e/0x2c0 net/socket.c:2036
 __do_sys_sendto net/socket.c:2048 [inline]
 __se_sys_sendto net/socket.c:2044 [inline]
 __x64_sys_sendto+0x74/0x90 net/socket.c:2044
 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: 0x000000000000007c -> 0x000000000000009c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 21252 Comm: syz-executor.1 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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syz-executor.1 (21252) used greatest stack depth: 9520 bytes left