syzbot

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BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer

write to 0xffffffff85f16b40 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer kernel/time/tick-sched.c:204 [inline]
 tick_sched_timer+0x2ad/0x2c0 kernel/time/tick-sched.c:1485
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
 __sysvec_apic_timer_interrupt+0x52/0x190 arch/x86/kernel/apic/apic.c:1080
 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1074
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 __sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:203
 tcp_rcv_established+0x85/0xea0 net/ipv4/tcp_input.c:5892
 tcp_v4_do_rcv+0x2d4/0x630 net/ipv4/tcp_ipv4.c:1728
 tcp_v4_rcv+0x1ade/0x1d60 net/ipv4/tcp_ipv4.c:2151
 ip_protocol_deliver_rcu+0x356/0x6d0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x13c/0x1a0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:304 [inline]
 ip_local_deliver+0xec/0x1c0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:468 [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+0x4f0/0x5c0 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:5595 [inline]
 __netif_receive_skb_list_core+0x356/0x460 net/core/dev.c:5643
 __netif_receive_skb_list net/core/dev.c:5695 [inline]
 netif_receive_skb_list_internal+0x4e6/0x660 net/core/dev.c:5786
 gro_normal_list include/net/gro.h:439 [inline]
 napi_complete_done+0x1cb/0x450 net/core/dev.c:6126
 virtqueue_napi_complete drivers/net/virtio_net.c:440 [inline]
 virtnet_poll+0x7f4/0xb40 drivers/net/virtio_net.c:2155
 __napi_poll+0x60/0x3b0 net/core/dev.c:6556
 napi_poll net/core/dev.c:6623 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6756
 __do_softirq+0xc1/0x265 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+0x42/0x90 arch/x86/kernel/irq.c:247
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636

read to 0xffffffff85f16b40 of 4 bytes by task 0 on cpu 1:
 tick_nohz_next_event+0x1d1/0x290 kernel/time/tick-sched.c:868
 tick_nohz_get_sleep_length+0x134/0x2c0 kernel/time/tick-sched.c:1250
 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:282
 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:380
 start_secondary+0x82/0x90 arch/x86/kernel/smpboot.c:326
 secondary_startup_64_no_verify+0x167/0x16b

value changed: 0xffffffff -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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