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BUG: KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_end

read-write to 0xffffc900033ca1b8 of 8 bytes by task 24 on cpu 0:
 kvm_mmu_notifier_invalidate_range_end+0x45/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:516
 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:479 [inline]
 page_mkclean_one+0x290/0x2d0 mm/rmap.c:966
 rmap_walk_file+0x260/0x4f0 mm/rmap.c:1927
 rmap_walk mm/rmap.c:1945 [inline]
 page_mkclean+0x17a/0x210 mm/rmap.c:998
 clear_page_dirty_for_io+0x116/0x300 mm/page-writeback.c:2698
 mpage_submit_page fs/ext4/inode.c:2081 [inline]
 mpage_process_page_bufs+0x41e/0x5d0 fs/ext4/inode.c:2215
 mpage_prepare_extent_to_map+0x4d6/0x630 fs/ext4/inode.c:2627
 ext4_writepages+0x674/0x1e50 fs/ext4/inode.c:2755
 do_writepages+0x7b/0x150 mm/page-writeback.c:2352
 __writeback_single_inode+0x84/0x560 fs/fs-writeback.c:1461
 writeback_sb_inodes+0x6a0/0x1020 fs/fs-writeback.c:1721
 wb_writeback+0x27d/0x660 fs/fs-writeback.c:1894
 wb_do_writeback+0x101/0x5d0 fs/fs-writeback.c:2039
 wb_workfn+0xb8/0x410 fs/fs-writeback.c:2080
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffffc900033ca1b8 of 8 bytes by task 12358 on cpu 1:
 kvm_mmu_notifier_invalidate_range_end+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:519
 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_only_end include/linux/mmu_notifier.h:486 [inline]
 wp_page_copy+0x929/0x1490 mm/memory.c:2954
 do_wp_page+0x482/0x6c0 arch/x86/include/asm/atomic.h:95
 handle_pte_fault mm/memory.c:4405 [inline]
 __handle_mm_fault mm/memory.c:4522 [inline]
 handle_mm_fault+0x1407/0x17b0 mm/memory.c:4620
 do_user_addr_fault+0x433/0x830 arch/x86/mm/fault.c:1393
 handle_page_fault arch/x86/mm/fault.c:1450 [inline]
 exc_page_fault+0x94/0x2a0 arch/x86/mm/fault.c:1506
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580
 copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:205
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
 copyout lib/iov_iter.c:148 [inline]
 copy_page_to_iter_iovec lib/iov_iter.c:219 [inline]
 copy_page_to_iter+0x342/0x850 lib/iov_iter.c:926
 process_vm_rw_pages mm/process_vm_access.c:46 [inline]
 process_vm_rw_single_vec+0x2c8/0x460 mm/process_vm_access.c:118
 process_vm_rw_core mm/process_vm_access.c:216 [inline]
 process_vm_rw+0x3a3/0x540 mm/process_vm_access.c:284
 __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
 __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
 __x64_sys_process_vm_readv+0x76/0x90 mm/process_vm_access.c:292
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 12358 Comm: syz-executor.3 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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