================================================================== BUG: KCSAN: data-race in tick_nohz_highres_handler / tick_nohz_next_event write to 0xffffffff8611ee30 of 4 bytes by interrupt on cpu 1: tick_sched_do_timer kernel/time/tick-sched.c:205 [inline] tick_nohz_highres_handler+0x2ad/0x2c0 kernel/time/tick-sched.c:1512 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x210/0x5d0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x52/0x190 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x6a/0x80 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 skb_try_coalesce+0x34a/0x8d0 tcp_try_coalesce+0x1bd/0x3d0 net/ipv4/tcp_input.c:4811 tcp_queue_rcv+0x62/0x240 net/ipv4/tcp_input.c:5078 tcp_data_queue+0x719/0x2d70 net/ipv4/tcp_input.c:5199 tcp_rcv_established+0x8fc/0xef0 net/ipv4/tcp_input.c:6170 tcp_v4_do_rcv+0x2d4/0x630 net/ipv4/tcp_ipv4.c:1906 tcp_v4_rcv+0x1ab0/0x1d40 net/ipv4/tcp_ipv4.c:2329 ip_protocol_deliver_rcu+0x356/0x6d0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x13c/0x1b0 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] ip_local_deliver+0xec/0x1c0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline] ip_sublist_rcv+0x4e7/0x5b0 net/ipv4/ip_input.c:639 ip_list_rcv+0x25e/0x290 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5577 [inline] __netif_receive_skb_list_core+0x356/0x460 net/core/dev.c:5625 __netif_receive_skb_list net/core/dev.c:5677 [inline] netif_receive_skb_list_internal+0x4e6/0x660 net/core/dev.c:5768 gro_normal_list include/net/gro.h:439 [inline] napi_complete_done+0x1cb/0x450 net/core/dev.c:6108 virtqueue_napi_complete drivers/net/virtio_net.c:465 [inline] virtnet_poll+0x7e5/0xc10 drivers/net/virtio_net.c:2211 __napi_poll+0x60/0x3c0 net/core/dev.c:6576 napi_poll net/core/dev.c:6645 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6778 __do_softirq+0xc4/0x27b kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644 common_interrupt+0x43/0x90 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640 read to 0xffffffff8611ee30 of 4 bytes by task 0 on cpu 0: tick_nohz_next_event+0x1f1/0x2d0 kernel/time/tick-sched.c:873 tick_nohz_get_sleep_length+0x134/0x2c0 kernel/time/tick-sched.c:1264 menu_select+0x81a/0x1060 drivers/cpuidle/governors/menu.c:286 cpuidle_select+0x41/0x50 drivers/cpuidle/cpuidle.c:359 cpuidle_idle_call kernel/sched/idle.c:208 [inline] do_idle+0x160/0x230 kernel/sched/idle.c:312 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:410 rest_init+0xf3/0x100 init/main.c:730 arch_call_rest_init+0x9/0x10 init/main.c:827 start_kernel+0x57d/0x5e0 init/main.c:1072 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555 x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x15f/0x16b value changed: 0xffffffff -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00002-gfca7526b7d89 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ==================================================================