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BUG: KCSAN: data-race in mas_state_walk / mas_wr_modify

write to 0xffff888104025248 of 8 bytes by task 14686 on cpu 1:
 mas_wr_slot_store lib/maple_tree.c:4028 [inline]
 mas_wr_modify+0x1600/0x37d0 lib/maple_tree.c:4226
 mas_wr_store_entry+0x235/0x350 lib/maple_tree.c:4269
 mas_store_prealloc+0x155/0x2b0 lib/maple_tree.c:5460
 vma_iter_store mm/internal.h:1126 [inline]
 vma_expand+0x483/0x4f0 mm/mmap.c:658
 mmap_region+0x843/0x1600 mm/mmap.c:2719
 do_mmap+0x67e/0xa90 mm/mmap.c:1354
 vm_mmap_pgoff+0x12e/0x240 mm/util.c:546
 ksys_mmap_pgoff+0xc5/0x330 mm/mmap.c:1400
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888104025248 of 8 bytes by task 14689 on cpu 0:
 mtree_range_walk lib/maple_tree.c:2817 [inline]
 mas_state_walk+0x328/0x5d0 lib/maple_tree.c:3712
 mas_walk+0x31/0x120 lib/maple_tree.c:4888
 lock_vma_under_rcu+0x8d/0x2a0 mm/memory.c:5436
 do_user_addr_fault arch/x86/mm/fault.c:1356 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x164/0x6c0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x00007f4be262ffff -> 0x00007f4be260efff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14689 Comm: syz-executor.2 Not tainted 6.6.0-rc5-syzkaller-00250-g70f8c6f8f880 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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