EXT4-fs error (device loop4): ext4_acquire_dquot:6986: comm syz.4.1017: Failed to acquire dquot type 0
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BUG: KCSAN: data-race in mas_state_walk / mas_wmb_replace

write to 0xffff88810370bc00 of 8 bytes by task 7069 on cpu 1:
 mte_set_node_dead lib/maple_tree.c:334 [inline]
 mas_put_in_tree lib/maple_tree.c:1565 [inline]
 mas_topiary_replace lib/maple_tree.c:2341 [inline]
 mas_wmb_replace+0x208/0xfa0 lib/maple_tree.c:2433
 mas_spanning_rebalance+0x18a5/0x1e40 lib/maple_tree.c:2738
 mas_wr_spanning_store+0x1af3/0x1e90 lib/maple_tree.c:3479
 mas_wr_store_entry+0xf8a/0x2990 lib/maple_tree.c:3767
 mas_store_prealloc+0x72e/0xa60 lib/maple_tree.c:5169
 vma_iter_store_overwrite mm/vma.h:544 [inline]
 commit_merge+0x6a1/0x720 mm/vma.c:761
 vma_merge_existing_range mm/vma.c:974 [inline]
 vma_modify+0x8f4/0xd30 mm/vma.c:1649
 vma_modify_flags+0x182/0x210 mm/vma.c:1692
 mprotect_fixup+0x30e/0x5e0 mm/mprotect.c:756
 do_mprotect_pkey+0x67b/0x920 mm/mprotect.c:930
 __do_sys_mprotect mm/mprotect.c:951 [inline]
 __se_sys_mprotect mm/mprotect.c:948 [inline]
 __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:948
 x64_sys_call+0x2c3b/0x3000 arch/x86/include/generated/asm/syscalls_64.h:11
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810370bc00 of 8 bytes by task 7082 on cpu 0:
 ma_dead_node lib/maple_tree.c:572 [inline]
 mte_dead_node lib/maple_tree.c:587 [inline]
 mas_start lib/maple_tree.c:1207 [inline]
 mas_state_walk+0x119/0x650 lib/maple_tree.c:3291
 mas_walk+0x60/0x150 lib/maple_tree.c:4599
 lock_vma_under_rcu+0xc9/0x210 mm/mmap_lock.c:253
 do_user_addr_fault+0x232/0x1050 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:618

value changed: 0xffff88810c468701 -> 0xffff88810370bc00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 7082 Comm: syz.4.1017 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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