================================================================== BUG: KCSAN: data-race in mas_wmb_replace / mtree_range_walk write to 0xffff888108ed3f00 of 8 bytes by task 5056 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:1292 [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+0x2bd/0x340 mm/mmap.c:1431 x64_sys_call+0x1815/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:10 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888108ed3f00 of 8 bytes by task 5054 on cpu 1: ma_dead_node lib/maple_tree.c:560 [inline] mtree_range_walk+0x33d/0x460 lib/maple_tree.c:2793 mas_state_walk lib/maple_tree.c:3678 [inline] mas_walk+0x16e/0x320 lib/maple_tree.c:4909 lock_vma_under_rcu+0x84/0x2a0 mm/memory.c:5758 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: 0xffff888103f34ac1 -> 0xffff888108ed3f00 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 5054 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ================================================================== loop4: detected capacity change from 0 to 1532