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BUG: KCSAN: data-race in __run_timers / internal_add_timer

write to 0xffff888237c1b698 of 8 bytes by interrupt on cpu 1:
 enqueue_timer kernel/time/timer.c:597 [inline]
 internal_add_timer+0x140/0x260 kernel/time/timer.c:609
 add_timer_on+0x262/0x2a0 kernel/time/timer.c:1180
 clocksource_watchdog+0x736/0x780 kernel/time/clocksource.c:303
 call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1431
 expire_timers+0x135/0x250 kernel/time/timer.c:1476
 __run_timers+0x358/0x420 kernel/time/timer.c:1745
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1758
 __do_softirq+0x12c/0x275 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0xa5/0xb0 kernel/softirq.c:637
 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:513 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:648
 cpuidle_enter_state+0x2b6/0x750 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x1a3/0x240 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xb0/0xbb

read to 0xffff888237c1b698 of 8 bytes by interrupt on cpu 0:
 __run_timers+0x50/0x420 kernel/time/timer.c:1726
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1758
 __do_softirq+0x12c/0x275 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0xa5/0xb0 kernel/softirq.c:637
 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
 check_kcov_mode kernel/kcov.c:165 [inline]
 __sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
 format_decode+0xeb/0x8a0 lib/vsprintf.c:2486
 vsnprintf+0xcd/0xed0 lib/vsprintf.c:2704
 audit_log_vformat+0x21c/0x470 kernel/audit.c:1926
 audit_log_format+0x76/0xa0 kernel/audit.c:1960
 audit_seccomp+0xcd/0xf0 kernel/auditsc.c:2661
 seccomp_log kernel/seccomp.c:1007 [inline]
 __seccomp_filter+0xcc7/0xec0 kernel/seccomp.c:1286
 __secure_computing+0xfb/0x140 kernel/seccomp.c:1316
 syscall_trace_enter+0x120/0x290 kernel/entry/common.c:67
 __syscall_enter_from_user_work kernel/entry/common.c:89 [inline]
 syscall_enter_from_user_mode+0x1c/0x20 kernel/entry/common.c:107
 do_syscall_64+0x27/0x90 arch/x86/entry/common.c:42
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 6964 Comm: syz-executor.4 Tainted: G        W         5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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