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BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active

read to 0xffff88812c01fbd8 of 8 bytes by task 7952 on cpu 1:
 hrtimer_active+0x84/0x1a0 kernel/time/hrtimer.c:1449
 hrtimer_try_to_cancel+0x3c/0x260 kernel/time/hrtimer.c:1163
 hrtimer_cancel kernel/time/hrtimer.c:1278 [inline]
 do_nanosleep+0x1a4/0x320 kernel/time/hrtimer.c:1876
 hrtimer_nanosleep+0x191/0x320 kernel/time/hrtimer.c:1927
 __do_sys_nanosleep kernel/time/hrtimer.c:1961 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1948 [inline]
 __x64_sys_nanosleep+0x106/0x150 kernel/time/hrtimer.c:1948
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
 __run_hrtimer kernel/time/hrtimer.c:1544 [inline]
 __hrtimer_run_queues+0x16c/0x5f0 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1641
 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:829
 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
 kcsan_setup_watchpoint+0x1d4/0x460 kernel/kcsan/core.c:429
 check_access kernel/kcsan/core.c:459 [inline]
 __tsan_unaligned_write8+0xc7/0x110 kernel/kcsan/core.c:589
 hlist_add_head include/linux/list.h:789 [inline]
 fib_create_info+0x17f9/0x2740 net/ipv4/fib_semantics.c:1553
 fib_table_insert+0xf1/0xac0 net/ipv4/fib_trie.c:1144
 fib_magic.isra.0+0x29d/0x2f0 net/ipv4/fib_frontend.c:1082
 fib_add_ifaddr+0x2f7/0x330 net/ipv4/fib_frontend.c:1124
 fib_netdev_event+0x1b2/0x230 net/ipv4/fib_frontend.c:1463
 notifier_call_chain+0xd7/0x160 kernel/notifier.c:83
 __raw_notifier_call_chain kernel/notifier.c:361 [inline]
 raw_notifier_call_chain+0x37/0x50 kernel/notifier.c:368
 call_netdevice_notifiers_info net/core/dev.c:1893 [inline]
 call_netdevice_notifiers_info+0x9a/0x120 net/core/dev.c:1878
 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline]
 call_netdevice_notifiers net/core/dev.c:1919 [inline]
 __dev_notify_flags+0xcf/0x200 net/core/dev.c:8143
 dev_change_flags+0xb8/0xe0 net/core/dev.c:8179
 do_setlink+0x64b/0x1ee0 net/core/rtnetlink.c:2591
 __rtnl_newlink+0x950/0x1090 net/core/rtnetlink.c:3238
 rtnl_newlink+0x63/0x90 net/core/rtnetlink.c:3363
 rtnetlink_rcv_msg+0x1d3/0x500 net/core/rtnetlink.c:5424
 netlink_rcv_skb+0xb0/0x260 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:5442
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x3a6/0x4d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x4d3/0x8b0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:659
 __sys_sendto+0x21f/0x320 net/socket.c:1985
 __do_sys_sendto net/socket.c:1997 [inline]
 __se_sys_sendto net/socket.c:1993 [inline]
 __x64_sys_sendto+0x89/0xb0 net/socket.c:1993
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7957 Comm: syz-executor.1 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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