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BUG: KCSAN: data-race in ktime_get_real_seconds / timekeeping_advance

write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 1:
 timekeeping_advance+0x88e/0xd80 include/linux/string.h:381
 update_wall_time+0x15/0x20 kernel/time/timekeeping.c:2136
 tick_do_update_jiffies64+0x1e5/0x2a0 kernel/time/tick-sched.c:101
 tick_sched_do_timer+0xc7/0xd0 kernel/time/tick-sched.c:147
 tick_sched_timer+0x3f/0xd0 kernel/time/tick-sched.c:1313
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
 kcsan_setup_watchpoint+0x25a/0x440 kernel/kcsan/core.c:542
 pagefault_disabled_inc include/linux/uaccess.h:168 [inline]
 pagefault_disable include/linux/uaccess.h:185 [inline]
 kmap_atomic include/linux/highmem.h:94 [inline]
 copy_highpage include/linux/highmem.h:271 [inline]
 migrate_page_copy+0x398/0x990 mm/migrate.c:673
 migrate_page+0xef/0x150 mm/migrate.c:703
 move_to_new_page+0xc8/0x3d0 mm/migrate.c:963
 __unmap_and_move mm/migrate.c:1129 [inline]
 unmap_and_move mm/migrate.c:1206 [inline]
 migrate_pages+0x14bb/0x1b60 mm/migrate.c:1454
 do_mbind+0x8df/0x9f0 mm/mempolicy.c:1374
 kernel_mbind+0x10e/0x130 mm/mempolicy.c:1495
 __do_sys_mbind mm/mempolicy.c:1502 [inline]
 __se_sys_mbind mm/mempolicy.c:1498 [inline]
 __x64_sys_mbind+0x7e/0xa0 mm/mempolicy.c:1498
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff88ae9138 of 8 bytes by task 3716 on cpu 0:
 ktime_get_real_seconds+0x1d/0x30 kernel/time/timekeeping.c:127
 recently_deleted fs/ext4/ialloc.c:699 [inline]
 find_inode_bit.isra.0+0x1e7/0x330 fs/ext4/ialloc.c:724
 __ext4_new_inode+0xd7b/0x3020 fs/ext4/ialloc.c:927
 ext4_symlink+0x322/0x9e0 fs/ext4/namei.c:3295
 vfs_symlink fs/namei.c:3937 [inline]
 vfs_symlink+0x216/0x330 fs/namei.c:3923
 do_symlinkat+0x1ac/0x1e0 fs/namei.c:3964
 __do_sys_symlink fs/namei.c:3983 [inline]
 __se_sys_symlink fs/namei.c:3981 [inline]
 __x64_sys_symlink+0x3c/0x50 fs/namei.c:3981
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3716 Comm: syz-executor.2 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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