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BUG: KCSAN: data-race in direct_page_fault / kvm_mmu_notifier_invalidate_range_end

write to 0xffffc90001792158 of 8 bytes by task 7 on cpu 1:
 kvm_mmu_notifier_invalidate_range_end+0x43/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:443
 mn_hlist_invalidate_end mm/mmu_notifier.c:553 [inline]
 __mmu_notifier_invalidate_range_end+0x19e/0x250 mm/mmu_notifier.c:573
 mmu_notifier_invalidate_range_end include/linux/mmu_notifier.h:472 [inline]
 page_mkclean_one+0x408/0x410 mm/rmap.c:973
 rmap_walk_file+0x240/0x590 mm/rmap.c:1920
 rmap_walk+0x10e/0x180 mm/rmap.c:1938
 page_mkclean+0x15d/0x190 mm/rmap.c:1005
 clear_page_dirty_for_io+0x1d6/0x5a0 mm/page-writeback.c:2690
 mpage_submit_page+0x64/0x190 fs/ext4/inode.c:2054
 mpage_process_page_bufs+0x3df/0x400 fs/ext4/inode.c:2188
 mpage_prepare_extent_to_map+0x43b/0x6e0 fs/ext4/inode.c:2597
 ext4_writepages+0x585/0x1d40 fs/ext4/inode.c:2725
 do_writepages+0x6b/0x170 mm/page-writeback.c:2344
 __writeback_single_inode+0xaa/0x910 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x4c8/0xa10 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xe9/0x1b0 fs/fs-writeback.c:1785
 wb_writeback+0x557/0x6a0 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0x796/0x970 fs/fs-writeback.c:2078
 process_one_work+0x424/0x930 kernel/workqueue.c:2264
 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2410
 kthread+0x1cb/0x1f0 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffffc90001792158 of 8 bytes by task 29865 on cpu 0:
 direct_page_fault+0x1ac/0x15e0 arch/x86/kvm/mmu/mmu.c:4150
 tdp_page_fault+0xa9/0xd0 arch/x86/kvm/mmu/mmu.c:4237
 kvm_mmu_page_fault+0xe7/0xb10 arch/x86/kvm/mmu/mmu.c:5439
 handle_ept_violation+0x1e0/0x340 arch/x86/kvm/vmx/vmx.c:5139
 vmx_handle_exit+0x1de/0xd70 arch/x86/kvm/vmx/vmx.c:5909
 vcpu_enter_guest+0xc9e/0x3a20 arch/x86/kvm/x86.c:8434
 vcpu_run arch/x86/kvm/x86.c:8498 [inline]
 kvm_arch_vcpu_ioctl_run+0x298/0xdc0 arch/x86/kvm/x86.c:8720
 kvm_vcpu_ioctl+0x70b/0x9d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2932
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x101/0x150 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x47/0x60 fs/ioctl.c:770
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29865 Comm: syz-executor.1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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