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BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer

read to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer+0x33/0xe0 kernel/time/tick-sched.c:128
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 matching_access kernel/kcsan/encoding.h:89 [inline]
 find_watchpoint kernel/kcsan/core.c:94 [inline]
 __kcsan_check_watchpoint+0x7c/0x180 kernel/kcsan/core.c:307
 __tsan_read8+0x15/0x30 kernel/kcsan/kcsan.c:31
 __should_failslab+0x29/0x130 mm/failslab.c:20
 should_failslab+0x9/0x14 mm/slab_common.c:1740
 slab_pre_alloc_hook mm/slab.h:503 [inline]
 slab_alloc mm/slab.c:3305 [inline]
 kmem_cache_alloc+0x29/0x5d0 mm/slab.c:3483
 __build_skb+0x3b/0x80 net/core/skbuff.c:310
 __napi_alloc_skb+0x18a/0x210 net/core/skbuff.c:523
 napi_alloc_skb include/linux/skbuff.h:2813 [inline]
 page_to_skb+0x8d/0x480 drivers/net/virtio_net.c:384

write to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 1:
 tick_sched_do_timer+0xc0/0xe0 kernel/time/tick-sched.c:132
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 __kcsan_check_watchpoint+0x0/0x180 kernel/kcsan/core.c:293
 __should_failslab+0x29/0x130 mm/failslab.c:20
 should_failslab+0x9/0x14 mm/slab_common.c:1740
 slab_pre_alloc_hook mm/slab.h:503 [inline]
 slab_alloc_node mm/slab.c:3226 [inline]
 kmem_cache_alloc_node_trace+0x3b/0x670 mm/slab.c:3592
 __do_kmalloc_node mm/slab.c:3614 [inline]
 __kmalloc_node_track_caller+0x38/0x50 mm/slab.c:3629
 __kmalloc_reserve.isra.0+0x49/0xd0 net/core/skbuff.c:141
 __alloc_skb+0xc2/0x350 net/core/skbuff.c:209

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7305 Comm: syz-fuzzer Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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