==================================================================
BUG: KCSAN: data-race in mas_walk / mas_wmb_replace

write to 0xffff8881046fe500 of 8 bytes by task 3078 on cpu 0:
 mte_set_node_dead lib/maple_tree.c:323 [inline]
 mas_put_in_tree lib/maple_tree.c:1726 [inline]
 mas_topiary_replace lib/maple_tree.c:2555 [inline]
 mas_wmb_replace+0x20f/0x14f0 lib/maple_tree.c:2646
 mas_split lib/maple_tree.c:3393 [inline]
 mas_commit_b_node lib/maple_tree.c:3446 [inline]
 mas_wr_bnode lib/maple_tree.c:4158 [inline]
 mas_wr_modify+0x183d/0x3c90 lib/maple_tree.c:4196
 mas_wr_store_entry+0x250/0x390 lib/maple_tree.c:4229
 mas_store_prealloc+0x151/0x2b0 lib/maple_tree.c:5485
 vma_iter_store mm/internal.h:1290 [inline]
 vma_complete+0x3a7/0x760 mm/mmap.c:535
 __split_vma+0x5db/0x610 mm/mmap.c:2385
 do_vmi_align_munmap+0x224/0x9c0 mm/mmap.c:2550
 do_vmi_munmap+0x1eb/0x230 mm/mmap.c:2696
 mmap_region+0x523/0x1550 mm/mmap.c:2747
 do_mmap+0x6a6/0xac0 mm/mmap.c:1385
 vm_mmap_pgoff+0x12f/0x250 mm/util.c:573
 ksys_mmap_pgoff+0xc6/0x340 mm/mmap.c:1431
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff8881046fe500 of 8 bytes by task 3080 on cpu 1:
 mte_parent lib/maple_tree.c:545 [inline]
 mte_dead_node lib/maple_tree.c:577 [inline]
 mas_start lib/maple_tree.c:1369 [inline]
 mas_state_walk lib/maple_tree.c:3671 [inline]
 mas_walk+0x123/0x320 lib/maple_tree.c:4909
 lock_vma_under_rcu+0x84/0x2a0 mm/memory.c:5756
 do_user_addr_fault arch/x86/mm/fault.c:1354 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x161/0x6d0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0xffff888102bb4ac1 -> 0xffff8881046fe500

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3080 Comm: syz-fuzzer Not tainted 6.8.0-syzkaller-11409-gf6cef5f8c37f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================