================================================================== BUG: KCSAN: data-race in mas_state_walk / mast_fill_bnode write to 0xffff888104ba4e08 of 8 bytes by task 10359 on cpu 0: mat_add lib/maple_tree.c:995 [inline] mast_fill_bnode+0x132/0xeb0 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:4316 [inline] mas_wr_modify+0x134c/0x3590 lib/maple_tree.c:4354 mas_wr_store_entry+0x668/0x810 lib/maple_tree.c:4391 mas_store_prealloc+0xe9/0x250 lib/maple_tree.c:5530 vma_iter_store+0xcb/0xe0 mm/internal.h:1073 mmap_region+0xe6c/0x14d0 mm/mmap.c:2818 do_mmap+0x69c/0xaa0 mm/mmap.c:1363 vm_mmap_pgoff+0x12f/0x240 mm/util.c:543 ksys_mmap_pgoff+0xc5/0x330 mm/mmap.c:1409 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 0xffff888104ba4e08 of 8 bytes by task 10360 on cpu 1: mtree_range_walk lib/maple_tree.c:2957 [inline] mas_state_walk+0x28b/0x5d0 lib/maple_tree.c:3869 mas_walk+0x7e/0x160 lib/maple_tree.c:4981 lock_vma_under_rcu+0x8d/0x2d0 mm/memory.c:5385 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: 0x000000001fffefff -> 0xffff888133c37c08 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10360 Comm: syz-executor.4 Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 ==================================================================