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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff888237d1d9a0 of 8 bytes by interrupt on cpu 1:
 hrtimer_interrupt+0x209/0xac0 kernel/time/hrtimer.c:1803
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xa3/0x240 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x39/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 __sanitizer_cov_trace_const_cmp2+0x4/0xa0 kernel/kcov.c:281
 get_conntrack_index net/netfilter/nf_conntrack_proto_tcp.c:274 [inline]
 nf_conntrack_tcp_packet+0x33e/0x2a90 net/netfilter/nf_conntrack_proto_tcp.c:872
 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1827 [inline]
 nf_conntrack_in+0x2c9/0x88f net/netfilter/nf_conntrack_core.c:1918
 ipv4_conntrack_in+0x19/0x20 net/netfilter/nf_conntrack_proto.c:191
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow net/netfilter/core.c:619 [inline]
 nf_hook_slow_list+0x133/0x340 net/netfilter/core.c:657
 NF_HOOK_LIST include/linux/netfilter.h:343 [inline]
 ip_sublist_rcv+0x57b/0x5a0 net/ipv4/ip_input.c:607
 ip_list_rcv+0x262/0x290 net/ipv4/ip_input.c:644
 __netif_receive_skb_list_ptype net/core/dev.c:5508 [inline]
 __netif_receive_skb_list_core+0x35b/0x460 net/core/dev.c:5556
 __netif_receive_skb_list+0x29a/0x310 net/core/dev.c:5608
 netif_receive_skb_list_internal+0xe3/0x350 net/core/dev.c:5699
 gro_normal_list net/core/dev.c:5853 [inline]
 napi_complete_done+0x1b2/0x3c0 net/core/dev.c:6590
 virtqueue_napi_complete drivers/net/virtio_net.c:339 [inline]
 virtnet_poll+0x6b9/0x980 drivers/net/virtio_net.c:1554
 __napi_poll+0x65/0x3f0 net/core/dev.c:7023
 napi_poll net/core/dev.c:7090 [inline]
 net_rx_action+0x29e/0x650 net/core/dev.c:7177
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x37/0x70 kernel/softirq.c:649
 common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x1e/0x40
 kcsan_setup_watchpoint+0x94/0x420 kernel/kcsan/core.c:443
 number+0x925/0xb60 lib/vsprintf.c:556
 vsnprintf+0xb6d/0xed0 lib/vsprintf.c:2871
 seq_vprintf+0x71/0xd0 fs/seq_file.c:391
 SEQ_printf+0x87/0xc0 kernel/time/timer_list.c:38
 print_timer kernel/time/timer_list.c:52 [inline]
 print_active_timers kernel/time/timer_list.c:91 [inline]
 print_base kernel/time/timer_list.c:112 [inline]
 print_cpu+0x2e5/0x690 kernel/time/timer_list.c:123
 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x2e1/0x930 fs/seq_file.c:230
 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2156 [inline]
 generic_file_splice_read+0x24f/0x330 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237d1d9a0 of 8 bytes by task 24736 on cpu 0:
 print_cpu+0x32e/0x690 kernel/time/timer_list.c:133
 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x2e1/0x930 fs/seq_file.c:230
 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2156 [inline]
 generic_file_splice_read+0x24f/0x330 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000002cbabfc6ee -> 0x0000002cbac0632e

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24736 Comm: syz-executor.1 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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