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BUG: KCSAN: data-race in direct_page_fault / kvm_mmu_notifier_invalidate_range_end

write to 0xffffc900162de188 of 8 bytes by task 7 on cpu 0:
 kvm_mmu_notifier_invalidate_range_end+0x39/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:453
 mn_hlist_invalidate_end mm/mmu_notifier.c:560 [inline]
 __mmu_notifier_invalidate_range_end+0x18e/0x210 mm/mmu_notifier.c:580
 mmu_notifier_invalidate_range_end include/linux/mmu_notifier.h:473 [inline]
 page_mkclean_one+0x30e/0x360 mm/rmap.c:966
 rmap_walk_file+0x24a/0x4e0 mm/rmap.c:1928
 rmap_walk mm/rmap.c:1946 [inline]
 page_mkclean+0x17a/0x210 mm/rmap.c:998
 clear_page_dirty_for_io+0xd1/0x420 mm/page-writeback.c:2700
 mpage_submit_page fs/ext4/inode.c:2062 [inline]
 mpage_process_page_bufs+0x41e/0x600 fs/ext4/inode.c:2196
 mpage_prepare_extent_to_map+0x4ec/0x650 fs/ext4/inode.c:2608
 ext4_writepages+0x682/0x1ef0 fs/ext4/inode.c:2736
 do_writepages+0x7b/0x150 mm/page-writeback.c:2354
 __writeback_single_inode+0x81/0x610 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x5ac/0xe40 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xb2/0x240 fs/fs-writeback.c:1785
 wb_writeback+0x2e0/0x730 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback+0x55c/0x610 fs/fs-writeback.c:2049
 wb_workfn+0xc8/0x460 fs/fs-writeback.c:2078
 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269
 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415
 kthread+0x20d/0x230 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

read to 0xffffc900162de188 of 8 bytes by task 12171 on cpu 1:
 direct_page_fault+0x162/0x670 arch/x86/kvm/mmu/mmu.c:4121
 kvm_tdp_page_fault+0x92/0xa0 arch/x86/kvm/mmu/mmu.c:4208
 kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:115 [inline]
 kvm_mmu_page_fault+0xca/0x410 arch/x86/kvm/mmu/mmu.c:5422
 handle_ept_violation+0x249/0x5d0 arch/x86/kvm/vmx/vmx.c:5311
 vmx_handle_exit+0x58b/0xb90 arch/x86/kvm/vmx/vmx.c:6090
 vcpu_enter_guest+0x1ca9/0x2760 arch/x86/kvm/x86.c:8599
 vcpu_run+0x27e/0x790 arch/x86/kvm/x86.c:8664
 kvm_arch_vcpu_ioctl_run+0x38d/0x6a0 arch/x86/kvm/x86.c:8885
 kvm_vcpu_ioctl+0x565/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3166
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl fs/ioctl.c:753 [inline]
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl+0xc9/0x130 fs/ioctl.c:760
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:760
 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 12171 Comm: syz-executor.5 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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