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BUG: KCSAN: data-race in mas_walk / mas_wmb_replace

write to 0xffff888104a70700 of 8 bytes by task 19509 on cpu 0:
 mte_set_node_dead lib/maple_tree.c:337 [inline]
 mas_put_in_tree lib/maple_tree.c:1739 [inline]
 mas_topiary_replace lib/maple_tree.c:2554 [inline]
 mas_wmb_replace+0x222/0x14d0 lib/maple_tree.c:2645
 mas_split lib/maple_tree.c:3372 [inline]
 mas_commit_b_node lib/maple_tree.c:3392 [inline]
 mas_wr_bnode lib/maple_tree.c:4053 [inline]
 mas_wr_store_entry+0x1530/0x23f0 lib/maple_tree.c:4094
 mas_store_prealloc+0x6bf/0x960 lib/maple_tree.c:5479
 vma_iter_store mm/vma.h:391 [inline]
 __mmap_new_vma mm/vma.c:2376 [inline]
 __mmap_region mm/vma.c:2461 [inline]
 mmap_region+0xf4e/0x1620 mm/vma.c:2539
 do_mmap+0x98a/0xc30 mm/mmap.c:561
 vm_mmap_pgoff+0x16d/0x2d0 mm/util.c:575
 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:607
 x64_sys_call+0x1940/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104a70700 of 8 bytes by task 19507 on cpu 1:
 mte_parent lib/maple_tree.c:560 [inline]
 mte_dead_node lib/maple_tree.c:592 [inline]
 mas_start lib/maple_tree.c:1382 [inline]
 mas_state_walk lib/maple_tree.c:3602 [inline]
 mas_walk+0x123/0x320 lib/maple_tree.c:4909
 lock_vma_under_rcu+0x95/0x270 mm/memory.c:6381
 do_user_addr_fault arch/x86/mm/fault.c:1328 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x150/0x650 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0xffff888116a152c1 -> 0xffff888104a70700

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 19507 Comm: syz.0.5907 Not tainted 6.14.0-rc6-syzkaller-00205-g3571e8b091f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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