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BUG: KCSAN: data-race in wg_packet_receive / wg_packet_receive

read to 0xffff888136666bc8 of 4 bytes by interrupt on cpu 0:
 wg_cpumask_next_online drivers/net/wireguard/queueing.h:129 [inline]
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_consume_data drivers/net/wireguard/receive.c:533 [inline]
 wg_packet_receive+0x96e/0xdb0 drivers/net/wireguard/receive.c:583
 wg_receive+0x4a/0x70 drivers/net/wireguard/socket.c:326
 udp_queue_rcv_one_skb+0x792/0x8a0 net/ipv4/udp.c:2162
 udp_queue_rcv_skb+0x2b1/0x2d0 net/ipv4/udp.c:2239
 udp_unicast_rcv_skb+0x198/0x1c0 net/ipv4/udp.c:2399
 __udp4_lib_rcv+0xa24/0xe90 net/ipv4/udp.c:2471
 udp_rcv+0x1d/0x20 net/ipv4/udp.c:2644
 ip_protocol_deliver_rcu+0x23b/0x480 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x126/0x160 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x100/0x1b0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:437 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x1b1/0x260 net/ipv4/ip_input.c:557
 __netif_receive_skb_one_core net/core/dev.c:5478 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5592
 process_backlog+0x23f/0x3b0 net/core/dev.c:5920
 __napi_poll+0x65/0x390 net/core/dev.c:6486
 napi_poll net/core/dev.c:6553 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6664
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 do_softirq+0xb1/0xf0 kernel/softirq.c:472
 __local_bh_enable_ip+0x6f/0x80 kernel/softirq.c:396
 __raw_read_unlock_bh include/linux/rwlock_api_smp.h:257 [inline]
 _raw_read_unlock_bh+0x17/0x20 kernel/locking/spinlock.c:284
 wg_socket_send_skb_to_peer+0x107/0x120 drivers/net/wireguard/socket.c:184
 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+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

write to 0xffff888136666bc8 of 4 bytes by interrupt on cpu 1:
 wg_cpumask_next_online drivers/net/wireguard/queueing.h:133 [inline]
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_consume_data drivers/net/wireguard/receive.c:533 [inline]
 wg_packet_receive+0x9b2/0xdb0 drivers/net/wireguard/receive.c:583
 wg_receive+0x4a/0x70 drivers/net/wireguard/socket.c:326
 udpv6_queue_rcv_one_skb+0xa62/0xb70 net/ipv6/udp.c:704
 udpv6_queue_rcv_skb+0x2c1/0x2e0 net/ipv6/udp.c:762
 udp6_unicast_rcv_skb+0x16b/0x190 net/ipv6/udp.c:905
 __udp6_lib_rcv+0x7ec/0x910 net/ipv6/udp.c:990
 udpv6_rcv+0x1d/0x20 net/ipv6/udp.c:1098
 ip6_protocol_deliver_rcu+0x882/0xd40 net/ipv6/ip6_input.c:436
 ip6_input_finish net/ipv6/ip6_input.c:481 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip6_input+0xca/0x180 net/ipv6/ip6_input.c:490
 dst_input include/net/dst.h:461 [inline]
 ip6_rcv_finish+0x1de/0x270 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ipv6_rcv+0x85/0x140 net/ipv6/ip6_input.c:306
 __netif_receive_skb_one_core net/core/dev.c:5478 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5592
 process_backlog+0x23f/0x3b0 net/core/dev.c:5920
 __napi_poll+0x65/0x390 net/core/dev.c:6486
 napi_poll net/core/dev.c:6553 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6664
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 do_softirq+0xb1/0xf0 kernel/softirq.c:472
 __local_bh_enable_ip+0x6f/0x80 kernel/softirq.c:396
 __raw_read_unlock_bh include/linux/rwlock_api_smp.h:257 [inline]
 _raw_read_unlock_bh+0x17/0x20 kernel/locking/spinlock.c:284
 wg_socket_send_skb_to_peer+0x107/0x120 drivers/net/wireguard/socket.c:184
 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+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

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1889 Comm: kworker/1:2 Not tainted 5.18.0-syzkaller-11793-g8eca6b0a647a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
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