================================================================== BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer 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 find_watchpoint kernel/kcsan/core.c:94 [inline] __kcsan_check_watchpoint+0xed/0x180 kernel/kcsan/core.c:322 __tsan_read8+0x15/0x30 kernel/kcsan/kcsan.c:31 iptable_raw_hook+0x27/0x60 net/ipv4/netfilter/iptable_raw.c:44 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0x83/0x160 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:260 [inline] __ip_local_out+0x1f7/0x2b0 net/ipv4/ip_output.c:114 ip_local_out+0x31/0x90 net/ipv4/ip_output.c:123 __ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x60 include/net/ip.h:236 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 __kcsan_setup_watchpoint+0x8/0x510 kernel/kcsan/core.c:351 __tsan_read4 kernel/kcsan/kcsan.c:30 [inline] __tsan_read4+0x2c/0x30 kernel/kcsan/kcsan.c:30 __rcu_read_lock+0x2a/0x50 kernel/rcu/tree_plugin.h:369 rcu_read_lock include/linux/rcupdate.h:590 [inline] nf_hook include/linux/netfilter.h:224 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ip_rcv+0x84/0x1a0 net/ipv4/ip_input.c:523 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:5004 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5118 netif_receive_skb_internal+0x59/0x190 net/core/dev.c:5208 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================