============================= WARNING: suspicious RCU usage 6.5.0-rc3-next-20230727-syzkaller #0 Not tainted ----------------------------- lib/maple_tree.c:839 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.5/6065: #0: ffff88802b4b8148 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:654 [inline] #0: ffff88802b4b8148 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x201/0x950 mm/memory.c:5585 stack backtrace: CPU: 0 PID: 6065 Comm: syz-executor.5 Not tainted 6.5.0-rc3-next-20230727-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6719 mas_root lib/maple_tree.c:839 [inline] mas_root lib/maple_tree.c:837 [inline] mas_start lib/maple_tree.c:1381 [inline] mas_state_walk lib/maple_tree.c:3832 [inline] mas_walk+0x55e/0x7d0 lib/maple_tree.c:4973 find_mergeable_anon_vma+0x102/0x890 mm/mmap.c:1085 __anon_vma_prepare+0x7d/0x550 mm/rmap.c:200 anon_vma_prepare include/linux/rmap.h:159 [inline] wp_page_copy mm/memory.c:3202 [inline] do_wp_page+0x1bbf/0x2e10 mm/memory.c:3579 handle_pte_fault mm/memory.c:5133 [inline] __handle_mm_fault+0x1704/0x4030 mm/memory.c:5257 handle_mm_fault+0x47a/0xa00 mm/memory.c:5422 do_user_addr_fault+0x2e7/0xfe0 arch/x86/mm/fault.c:1342 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fd01342b2a3 Code: 8b 44 24 08 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 7a 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 d2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 44 24 08 48 RSP: 002b:00007ffc5e9a5880 EFLAGS: 00010246 RAX: 0000000020001300 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000020000200 RSI: 0000000000000000 RDI: 000055555664e360 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000 R10: 000000008172de39 R11: 0000000000000246 R12: 00007fd013000288 R13: fffffffffffffffe R14: 00007fd013000000 R15: 00007fd013000290 ============================= WARNING: suspicious RCU usage 6.5.0-rc3-next-20230727-syzkaller #0 Not tainted ----------------------------- lib/maple_tree.c:795 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.5/6065: #0: ffff88802b4b8148 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:654 [inline] #0: ffff88802b4b8148 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x201/0x950 mm/memory.c:5585 stack backtrace: CPU: 1 PID: 6065 Comm: syz-executor.5 Not tainted 6.5.0-rc3-next-20230727-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6719 mt_slot lib/maple_tree.c:795 [inline] mt_slot lib/maple_tree.c:792 [inline] mtree_range_walk+0x6c5/0x9b0 lib/maple_tree.c:2946 mas_state_walk lib/maple_tree.c:3839 [inline] mas_walk+0x389/0x7d0 lib/maple_tree.c:4973 find_mergeable_anon_vma+0x102/0x890 mm/mmap.c:1085 __anon_vma_prepare+0x7d/0x550 mm/rmap.c:200 anon_vma_prepare include/linux/rmap.h:159 [inline] wp_page_copy mm/memory.c:3202 [inline] do_wp_page+0x1bbf/0x2e10 mm/memory.c:3579 handle_pte_fault mm/memory.c:5133 [inline] __handle_mm_fault+0x1704/0x4030 mm/memory.c:5257 handle_mm_fault+0x47a/0xa00 mm/memory.c:5422 do_user_addr_fault+0x2e7/0xfe0 arch/x86/mm/fault.c:1342 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fd01342b2a3 Code: 8b 44 24 08 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 7a 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 d2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 44 24 08 48 RSP: 002b:00007ffc5e9a5880 EFLAGS: 00010246 RAX: 0000000020001300 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000020000200 RSI: 0000000000000000 RDI: 000055555664e360 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000 R10: 000000008172de39 R11: 0000000000000246 R12: 00007fd013000288 R13: fffffffffffffffe R14: 00007fd013000000 R15: 00007fd013000290