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BUG: KCSAN: data-race in mas_state_walk / mas_wr_store_entry

write to 0xffff888106758468 of 8 bytes by task 10540 on cpu 0:
 mas_wr_slot_store lib/maple_tree.c:3919 [inline]
 mas_wr_store_entry+0x1581/0x2b50 lib/maple_tree.c:4095
 mas_store_prealloc+0x74d/0x9e0 lib/maple_tree.c:5507
 vma_iter_store_overwrite mm/vma.h:502 [inline]
 commit_merge+0x6a5/0x730 mm/vma.c:762
 vma_merge_existing_range mm/vma.c:970 [inline]
 vma_modify+0xad7/0xc80 mm/vma.c:1603
 vma_modify_flags+0x101/0x130 mm/vma.c:1644
 mprotect_fixup+0x2cc/0x570 mm/mprotect.c:658
 do_mprotect_pkey+0x6d6/0x980 mm/mprotect.c:832
 __do_sys_mprotect mm/mprotect.c:853 [inline]
 __se_sys_mprotect mm/mprotect.c:850 [inline]
 __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:850
 x64_sys_call+0x2794/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:11
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888106758468 of 8 bytes by task 10543 on cpu 1:
 mtree_range_walk lib/maple_tree.c:2781 [inline]
 mas_state_walk+0x2f5/0x650 lib/maple_tree.c:3630
 mas_walk+0x30/0x120 lib/maple_tree.c:4936
 lock_vma_under_rcu+0xa2/0x2f0 mm/mmap_lock.c:143
 do_user_addr_fault+0x233/0x1090 arch/x86/mm/fault.c:1327
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x00007fc46ae54fff -> 0x00007fc46ae34fff

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 10543 Comm: syz.1.2164 Not tainted 6.16.0-rc7-syzkaller-00105-g2942242dde89 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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