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BUG: KCSAN: data-race in call_rcu / mas_state_walk

write to 0xffff888103e0da08 of 8 bytes by task 23513 on cpu 1:
 __call_rcu_common kernel/rcu/tree.c:3122 [inline]
 call_rcu+0x51/0x3f0 kernel/rcu/tree.c:3243
 ma_free_rcu lib/maple_tree.c:211 [inline]
 mas_topiary_node lib/maple_tree.c:2527 [inline]
 mas_topiary_replace lib/maple_tree.c:2628 [inline]
 mas_wmb_replace+0xc6a/0x14a0 lib/maple_tree.c:2651
 mas_split lib/maple_tree.c:3390 [inline]
 mas_commit_b_node lib/maple_tree.c:3410 [inline]
 mas_wr_bnode lib/maple_tree.c:4079 [inline]
 mas_wr_store_entry+0x1773/0x2b50 lib/maple_tree.c:4111
 mas_store_prealloc+0x74d/0x9e0 lib/maple_tree.c:5510
 vma_iter_store_overwrite mm/vma.h:501 [inline]
 vma_iter_store_new+0x1c5/0x200 mm/vma.h:508
 vma_complete+0x125/0x580 mm/vma.c:354
 __split_vma+0x591/0x650 mm/vma.c:568
 vms_gather_munmap_vmas+0x17a/0x7b0 mm/vma.c:1359
 __mmap_prepare mm/vma.c:2359 [inline]
 __mmap_region mm/vma.c:2651 [inline]
 mmap_region+0x53f/0x1630 mm/vma.c:2739
 do_mmap+0x9b3/0xbe0 mm/mmap.c:558
 __do_sys_remap_file_pages mm/mmap.c:1194 [inline]
 __se_sys_remap_file_pages+0x55e/0x600 mm/mmap.c:1087
 __x64_sys_remap_file_pages+0x67/0x80 mm/mmap.c:1087
 x64_sys_call+0x23af/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:217
 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 0xffff888103e0da08 of 8 bytes by task 23507 on cpu 0:
 mtree_range_walk lib/maple_tree.c:2779 [inline]
 mas_state_walk+0x28f/0x650 lib/maple_tree.c:3636
 mas_walk+0x60/0x150 lib/maple_tree.c:4939
 lock_vma_under_rcu+0x8d/0x160 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: 0x00007f0ed702efff -> 0xffff88811a651808

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 23507 Comm: syz.6.7250 Tainted: G        W           6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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