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BUG: KCSAN: data-race in mas_wr_store_entry / mtree_range_walk

write to 0xffff888104f68f00 of 8 bytes by task 5004 on cpu 0:
 mte_set_node_dead lib/maple_tree.c:305 [inline]
 mas_put_in_tree lib/maple_tree.c:1652 [inline]
 mas_replace_node lib/maple_tree.c:1667 [inline]
 mas_wr_node_store lib/maple_tree.c:3276 [inline]
 mas_wr_store_entry+0x3c1f/0x5ac0 lib/maple_tree.c:3606
 mas_store_prealloc+0x421/0x670 lib/maple_tree.c:5031
 vma_iter_store_overwrite mm/vma.h:709 [inline]
 vma_iter_store_new mm/vma.h:716 [inline]
 __mmap_new_vma mm/vma.c:2710 [inline]
 __mmap_region mm/vma.c:2904 [inline]
 mmap_region+0x1f4d/0x2310 mm/vma.c:2989
 do_mmap+0xa20/0xc70 mm/mmap.c:573
 vm_mmap_pgoff+0x183/0x2d0 mm/util.c:581
 ksys_mmap_pgoff+0xc1/0x310 mm/mmap.c:619
 x64_sys_call+0x23b3/0x2550 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104f68f00 of 8 bytes by task 5005 on cpu 1:
 ma_dead_node lib/maple_tree.c:505 [inline]
 mtree_range_walk+0x35a/0x480 lib/maple_tree.c:2119
 mas_state_walk lib/maple_tree.c:3013 [inline]
 mas_walk+0x1ac/0x340 lib/maple_tree.c:4458
 lock_vma_under_rcu+0xc9/0x210 mm/mmap_lock.c:304
 do_user_addr_fault+0x23a/0xde0 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595

value changed: 0xffff888104fba40e -> 0xffff888104f68f00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5005 Comm: syz.1.334 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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