================================================================== BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer read to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 1: 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 memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 skb_clone+0xf9/0x280 net/core/skbuff.c:1448 skb_share_check include/linux/skbuff.h:1675 [inline] packet_rcv_spkt+0x2e2/0x350 net/packet/af_packet.c:1816 deliver_skb net/core/dev.c:1969 [inline] deliver_ptype_list_skb net/core/dev.c:1984 [inline] __netif_receive_skb_core+0xe13/0x1a90 net/core/dev.c:4962 __netif_receive_skb_one_core+0x67/0xe0 net/core/dev.c:5002 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5118 netif_receive_skb_internal+0x59/0x190 net/core/dev.c:5208 napi_skb_finish net/core/dev.c:5671 [inline] napi_gro_receive+0x28f/0x330 net/core/dev.c:5704 write to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 0: 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 arch_local_irq_enable arch/x86/include/asm/paravirt.h:778 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x4e/0x80 kernel/locking/spinlock.c:199 finish_lock_switch kernel/sched/core.c:3004 [inline] finish_task_switch+0x7b/0x260 kernel/sched/core.c:3104 context_switch kernel/sched/core.c:3257 [inline] __schedule+0x2ed/0x5d0 kernel/sched/core.c:3880 preempt_schedule_common+0x37/0x90 kernel/sched/core.c:4028 preempt_schedule+0x30/0x40 kernel/sched/core.c:4054 ___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50 __local_bh_enable_ip+0x44/0x80 kernel/softirq.c:196 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7191 Comm: syz-fuzzer Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================