================================================================== BUG: KCSAN: data-race in mas_state_walk / mast_fill_bnode write to 0xffff888104f34200 of 8 bytes by task 22264 on cpu 0: mte_set_node_dead lib/maple_tree.c:303 [inline] mat_add lib/maple_tree.c:994 [inline] mast_fill_bnode+0x126/0xeb0 lib/maple_tree.c:3373 mas_split lib/maple_tree.c:3579 [inline] mas_commit_b_node lib/maple_tree.c:3638 [inline] mas_wr_bnode lib/maple_tree.c:4315 [inline] mas_wr_modify+0x134c/0x3590 lib/maple_tree.c:4353 mas_wr_store_entry+0x668/0x810 lib/maple_tree.c:4390 mas_store_prealloc+0xe9/0x250 lib/maple_tree.c:5529 vma_iter_store mm/internal.h:1073 [inline] vma_complete+0x2b7/0x660 mm/mmap.c:564 __split_vma+0x3f2/0x420 mm/mmap.c:2392 do_vmi_align_munmap+0x274/0x9f0 mm/mmap.c:2486 do_vmi_munmap+0x1e2/0x210 mm/mmap.c:2634 mmap_region+0x53c/0x14c0 mm/mmap.c:2682 do_mmap+0x69c/0xaa0 mm/mmap.c:1373 vm_mmap_pgoff+0x12f/0x240 mm/util.c:543 ksys_mmap_pgoff+0x2b8/0x330 mm/mmap.c:1419 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888104f34200 of 8 bytes by task 22263 on cpu 1: ma_dead_node lib/maple_tree.c:538 [inline] mtree_range_walk lib/maple_tree.c:2977 [inline] mas_state_walk+0x43d/0x5d0 lib/maple_tree.c:3868 mas_walk+0x7e/0x160 lib/maple_tree.c:4980 lock_vma_under_rcu+0x8d/0x2b0 mm/memory.c:5381 do_user_addr_fault arch/x86/mm/fault.c:1335 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x160/0x650 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0xffff888164db3706 -> 0xffff888104f34200 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22263 Comm: syz-executor.3 Not tainted 6.4.0-syzkaller-09775-gd85a143b69ab #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 ==================================================================