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BUG: KCSAN: data-race in mas_walk / mas_wmb_replace

write to 0xffff88810437ac00 of 8 bytes by task 3489 on cpu 0:
 mte_set_node_dead lib/maple_tree.c:337 [inline]
 mas_put_in_tree lib/maple_tree.c:1735 [inline]
 mas_topiary_replace lib/maple_tree.c:2550 [inline]
 mas_wmb_replace+0x224/0x1510 lib/maple_tree.c:2641
 mas_spanning_rebalance+0x1af1/0x1cc0 lib/maple_tree.c:2936
 mas_wr_spanning_store+0x16a5/0x1aa0 lib/maple_tree.c:3788
 mas_wr_store_entry+0xdd2/0x2460 lib/maple_tree.c:4086
 mas_store_prealloc+0x6d5/0x960 lib/maple_tree.c:5475
 vma_iter_store_overwrite mm/vma.h:441 [inline]
 commit_merge+0x685/0x710 mm/vma.c:700
 vma_merge_existing_range+0x944/0xa20 mm/vma.c:911
 vma_modify+0x41/0x200 mm/vma.c:1531
 vma_modify_policy+0x10a/0x140 mm/vma.c:1596
 mbind_range+0x1d2/0x480 mm/mempolicy.c:869
 do_mbind mm/mempolicy.c:1371 [inline]
 kernel_mbind mm/mempolicy.c:1568 [inline]
 __do_sys_mbind mm/mempolicy.c:1642 [inline]
 __se_sys_mbind+0x76c/0xfe0 mm/mempolicy.c:1638
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1638
 x64_sys_call+0x13be/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:238
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810437ac00 of 8 bytes by task 3487 on cpu 1:
 ma_dead_node lib/maple_tree.c:575 [inline]
 mte_dead_node lib/maple_tree.c:590 [inline]
 mas_start lib/maple_tree.c:1378 [inline]
 mas_state_walk lib/maple_tree.c:3598 [inline]
 mas_walk+0x123/0x320 lib/maple_tree.c:4905
 lock_vma_under_rcu+0xa7/0x340 mm/memory.c:6553
 do_user_addr_fault arch/x86/mm/fault.c:1328 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x150/0x6a0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0xffff88810005ddc1 -> 0xffff88810437ac00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3487 Comm: syz.2.11 Not tainted 6.14.0-syzkaller-12886-ga1b5bd45d4ee #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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