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BUG: KCSAN: data-race in __run_timers / internal_add_timer

write to 0xffff888237d1b858 of 8 bytes by interrupt on cpu 0:
 enqueue_timer kernel/time/timer.c:598 [inline]
 internal_add_timer+0x14f/0x2b0 kernel/time/timer.c:611
 add_timer_on+0x247/0x280 kernel/time/timer.c:1182
 clocksource_watchdog+0xa96/0xac0 kernel/time/clocksource.c:478
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1421
 expire_timers+0x116/0x240 kernel/time/timer.c:1466
 __run_timers+0x368/0x410 kernel/time/timer.c:1734
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1747
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 __irq_exit_rcu kernel/softirq.c:636 [inline]
 irq_exit_rcu+0x37/0x70 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 kcsan_setup_watchpoint+0x94/0x3f0 kernel/kcsan/core.c:437
 skb_free_head net/core/skbuff.c:650 [inline]
 skb_release_data+0x312/0x370 net/core/skbuff.c:677
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb+0x3b/0x150 net/core/skbuff.c:756
 kfree_skb+0x4d/0x160 net/core/skbuff.c:774
 kauditd_hold_skb+0x100/0x140
 kauditd_send_queue+0x206/0x2e0 kernel/audit.c:734
 kauditd_thread+0x425/0x6f0 kernel/audit.c:860
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

read to 0xffff888237d1b858 of 8 bytes by interrupt on cpu 1:
 __run_timers+0x62/0x410 kernel/time/timer.c:1715
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1747
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 __irq_exit_rcu kernel/softirq.c:636 [inline]
 irq_exit_rcu+0x37/0x70 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 check_kcov_mode kernel/kcov.c:165 [inline]
 __sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
 audit_string_contains_control kernel/audit.c:2044 [inline]
 audit_log_n_untrustedstring kernel/audit.c:2068 [inline]
 audit_log_untrustedstring+0xa8/0xd0 kernel/audit.c:2084
 audit_log_task+0x13e/0x180 kernel/auditsc.c:2908
 audit_seccomp+0x5e/0xf0 kernel/auditsc.c:2956
 seccomp_log kernel/seccomp.c:985 [inline]
 __seccomp_filter+0xdf5/0xe40 kernel/seccomp.c:1281
 __secure_computing+0xfb/0x140 kernel/seccomp.c:1311
 syscall_trace_enter+0x120/0x2b0 kernel/entry/common.c:68
 __syscall_enter_from_user_work kernel/entry/common.c:90 [inline]
 syscall_enter_from_user_mode+0x1c/0x20 kernel/entry/common.c:108
 do_syscall_64+0x25/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000001000003c0 -> 0x00000001000002bd

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11671 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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