============================= WARNING: suspicious RCU usage 6.5.0-rc3-next-20230726 #1 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.2/4161: #0: ffff88800e129d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1f9/0x940 stack backtrace: CPU: 1 PID: 4161 Comm: syz-executor.2 Not tainted 6.5.0-rc3-next-20230726 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xc1/0xf0 lockdep_rcu_suspicious+0x1f0/0x290 mas_walk+0x4f7/0x7c0 find_mergeable_anon_vma+0x102/0x880 __anon_vma_prepare+0x7d/0x500 do_wp_page+0x1d62/0x2f00 __handle_mm_fault+0xdc8/0x2b90 handle_mm_fault+0x2c1/0xb10 do_user_addr_fault+0x382/0x1490 exc_page_fault+0x9c/0x1a0 asm_exc_page_fault+0x26/0x30 RIP: 0033:0x7f5e72b12ef6 Code: 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 <48> 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 89 4c 17 fc 89 37 c3 RSP: 002b:00007ffc03476988 EFLAGS: 00010246 RAX: 0000000020000040 RBX: 00007f5e72c2bb60 RCX: 0031656c69662f2e RDX: 0000000000000008 RSI: 0031656c69662f2e RDI: 0000000020000040 RBP: 00007ffc03476a48 R08: 00007f5e7302f000 R09: 00007f5e72c2f458 R10: 00007ffc03476a60 R11: 0000000000000246 R12: 0000000000029f99 R13: 00000000000003e8 R14: 00007f5e72c2af60 R15: 0000000000029f54 ============================= WARNING: suspicious RCU usage 6.5.0-rc3-next-20230726 #1 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.2/4161: #0: ffff88800e129d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1f9/0x940 stack backtrace: CPU: 1 PID: 4161 Comm: syz-executor.2 Not tainted 6.5.0-rc3-next-20230726 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xc1/0xf0 lockdep_rcu_suspicious+0x1f0/0x290 mtree_range_walk+0x67f/0x910 mas_walk+0x394/0x7c0 find_mergeable_anon_vma+0x102/0x880 __anon_vma_prepare+0x7d/0x500 do_wp_page+0x1d62/0x2f00 __handle_mm_fault+0xdc8/0x2b90 handle_mm_fault+0x2c1/0xb10 do_user_addr_fault+0x382/0x1490 exc_page_fault+0x9c/0x1a0 asm_exc_page_fault+0x26/0x30 RIP: 0033:0x7f5e72b12ef6 Code: 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 <48> 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 89 4c 17 fc 89 37 c3 RSP: 002b:00007ffc03476988 EFLAGS: 00010246 RAX: 0000000020000040 RBX: 00007f5e72c2bb60 RCX: 0031656c69662f2e RDX: 0000000000000008 RSI: 0031656c69662f2e RDI: 0000000020000040 RBP: 00007ffc03476a48 R08: 00007f5e7302f000 R09: 00007f5e72c2f458 R10: 00007ffc03476a60 R11: 0000000000000246 R12: 0000000000029f99 R13: 00000000000003e8 R14: 00007f5e72c2af60 R15: 0000000000029f54 loop1: detected capacity change from 0 to 40