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BUG: KCSAN: data-race in call_rcu / mas_state_walk

write to 0xffff888102ba6b08 of 8 bytes by task 32175 on cpu 0:
 __call_rcu_common kernel/rcu/tree.c:2680 [inline]
 call_rcu+0x49/0x410 kernel/rcu/tree.c:2795
 ma_free_rcu lib/maple_tree.c:190 [inline]
 mas_topiary_node lib/maple_tree.c:2556 [inline]
 mas_topiary_replace lib/maple_tree.c:2656 [inline]
 mas_wmb_replace+0xc99/0x14a0 lib/maple_tree.c:2678
 mas_split lib/maple_tree.c:3429 [inline]
 mas_commit_b_node lib/maple_tree.c:3482 [inline]
 mas_wr_bnode lib/maple_tree.c:4198 [inline]
 mas_wr_modify+0x17c6/0x37d0 lib/maple_tree.c:4236
 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:1198 [inline]
 vma_complete+0x2a0/0x650 mm/mmap.c:532
 __split_vma+0x596/0x5d0 mm/mmap.c:2411
 split_vma mm/mmap.c:2437 [inline]
 vma_modify+0x1e3/0x240 mm/mmap.c:2479
 vma_modify_flags include/linux/mm.h:3271 [inline]
 mprotect_fixup+0x324/0x5c0 mm/mprotect.c:635
 do_mprotect_pkey+0x641/0x920 mm/mprotect.c:809
 __do_sys_mprotect mm/mprotect.c:830 [inline]
 __se_sys_mprotect mm/mprotect.c:827 [inline]
 __x64_sys_mprotect+0x48/0x50 mm/mprotect.c:827
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888102ba6b08 of 8 bytes by task 32177 on cpu 1:
 mtree_range_walk lib/maple_tree.c:2808 [inline]
 mas_state_walk+0x28b/0x5d0 lib/maple_tree.c:3712
 mas_walk+0x31/0x120 lib/maple_tree.c:4888
 lock_vma_under_rcu+0x8d/0x2a0 mm/memory.c:5497
 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: 0x00007f31c4654fff -> 0xffff888103d36208

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 32177 Comm: syz-executor.2 Not tainted 6.7.0-rc5-syzkaller-00014-g26aff849438c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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