syzbot

==================================================================
BUG: KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets

read to 0xffff888137435ac8 of 4 bytes by interrupt on cpu 1:
 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_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x68f/0xb50 drivers/net/wireguard/send.c:387
 wg_packet_send_keepalive+0xe4/0x100 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x38/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1474
 expire_timers+0x116/0x240 kernel/time/timer.c:1519
 __run_timers+0x350/0x400 kernel/time/timer.c:1790
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1803
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 __irq_exit_rcu kernel/softirq.c:650 [inline]
 irq_exit_rcu+0x41/0x70 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20
 is_atomic kernel/kcsan/core.c:258 [inline]
 should_watch kernel/kcsan/core.c:275 [inline]
 check_access kernel/kcsan/core.c:741 [inline]
 __tsan_read8+0x132/0x180 kernel/kcsan/core.c:1014
 prepend_path+0x1ed/0x670
 d_path+0x1fb/0x2c0 fs/d_path.c:290
 audit_log_d_path+0xb3/0x260 kernel/audit.c:2141
 audit_log_d_path_exe+0x3e/0x70 kernel/audit.c:2207
 audit_log_task+0x159/0x180 kernel/auditsc.c:2971
 audit_seccomp+0x64/0x120 kernel/auditsc.c:3018
 seccomp_log kernel/seccomp.c:994 [inline]
 __seccomp_filter+0xea6/0xf00 kernel/seccomp.c:1312
 __secure_computing+0x9b/0x1c0 kernel/seccomp.c:1342
 syscall_trace_enter kernel/entry/common.c:70 [inline]
 __syscall_enter_from_user_work kernel/entry/common.c:92 [inline]
 syscall_enter_from_user_mode+0xb6/0x190 kernel/entry/common.c:110
 do_syscall_64+0xc/0x70 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffff888137435ac8 of 4 bytes by interrupt on cpu 0:
 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_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x7ac/0xb50 drivers/net/wireguard/send.c:387
 wg_packet_send_keepalive+0xe4/0x100 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x38/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1474
 expire_timers+0x116/0x240 kernel/time/timer.c:1519
 __run_timers+0x350/0x400 kernel/time/timer.c:1790
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1803
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 __irq_exit_rcu kernel/softirq.c:650 [inline]
 irq_exit_rcu+0x41/0x70 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20
 get_current arch/x86/include/asm/current.h:15 [inline]
 __syscall_enter_from_user_work kernel/entry/common.c:89 [inline]
 syscall_enter_from_user_mode+0x17/0x190 kernel/entry/common.c:110
 do_syscall_64+0xc/0x70 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 17804 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-13322-gd4252071b97d-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
==================================================================