================================ WARNING: inconsistent lock state 5.10.0-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. systemd-udevd/21771 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff8881412642a8 (&file_data->lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff8881412642a8 (&file_data->lock){+.?.}-{2:2}, at: io_file_data_ref_zero+0x6a/0x3a0 fs/io_uring.c:7361 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5437 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] io_sqe_files_register fs/io_uring.c:7496 [inline] __io_uring_register fs/io_uring.c:9665 [inline] __do_sys_io_uring_register fs/io_uring.c:9755 [inline] __se_sys_io_uring_register+0x2416/0x2850 fs/io_uring.c:9737 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 irq event stamp: 368 hardirqs last enabled at (368): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (368): [] _raw_spin_unlock_irqrestore+0x2e/0x60 kernel/locking/spinlock.c:191 hardirqs last disabled at (367): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (367): [] _raw_spin_lock_irqsave+0x4d/0xa0 kernel/locking/spinlock.c:159 softirqs last enabled at (0): [] copy_process+0x10dd/0x53c0 kernel/fork.c:2048 softirqs last disabled at (61): [] asm_call_irq_on_stack+0xf/0x20 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&file_data->lock); lock(&file_data->lock); *** DEADLOCK *** 5 locks held by systemd-udevd/21771: #0: ffff8880189b6458 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff8880189b6458 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x2c2/0xb80 arch/x86/mm/fault.c:1334 #1: ffffffff8bce85c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:252 #2: ffff8880137042b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #2: ffff8880137042b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: pte_alloc_one_map mm/memory.c:3699 [inline] #2: ffff8880137042b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: alloc_set_pte+0xb2b/0x1520 mm/memory.c:3812 #3: ffffffff8bce8680 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire+0x0/0x20 kernel/rcu/tree.c:1374 #4: ffffffff8bce85c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:252 stack backtrace: CPU: 0 PID: 21771 Comm: systemd-udevd Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x137/0x1be lib/dump_stack.c:120 print_usage_bug+0xbfe/0x1080 kernel/locking/lockdep.c:3740 mark_lock_irq kernel/locking/lockdep.c:3751 [inline] mark_lock+0x182d/0x1ef0 kernel/locking/lockdep.c:4411 mark_usage kernel/locking/lockdep.c:4306 [inline] __lock_acquire+0xbe6/0x5e90 kernel/locking/lockdep.c:4786 lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5437 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] io_file_data_ref_zero+0x6a/0x3a0 fs/io_uring.c:7361 percpu_ref_put_many include/linux/percpu-refcount.h:322 [inline] percpu_ref_put+0x1cb/0x1d0 include/linux/percpu-refcount.h:338 rcu_do_batch kernel/rcu/tree.c:2489 [inline] rcu_core+0x7db/0x10c0 kernel/rcu/tree.c:2723 __do_softirq+0x307/0x6be kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x9a/0xe0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu+0x1d6/0x200 kernel/softirq.c:423 irq_exit_rcu+0x5/0x20 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0xe0/0xf0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] RIP: 0010:PageCompound include/linux/page-flags.h:198 [inline] RIP: 0010:PageHuge+0x19/0x120 mm/hugetlb.c:1551 Code: 5a bb 89 e8 49 77 f3 ff 0f 0b 0f 1f 80 00 00 00 00 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 77 e6 c1 ff <4c> 89 f7 be 08 00 00 00 e8 2a ac 04 00 4c 89 f0 48 c1 e8 03 42 80 RSP: 0000:ffffc9000ada7bb0 EFLAGS: 00000293 RAX: ffffffff81b39c09 RBX: 0000000000000000 RCX: ffff88801baa1ac0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0000264640 RBP: ffffea0000264648 R08: ffffffff819a715d R09: fffff9400004c8cf R10: fffff9400004c8cf R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea0000264640 R14: ffffea0000264640 R15: dffffc0000000000 find_subpage include/linux/pagemap.h:446 [inline] filemap_map_pages+0x47c/0xdb0 mm/filemap.c:2941 do_fault_around mm/memory.c:3978 [inline] do_read_fault+0x3b3/0xaa0 mm/memory.c:4012 do_fault mm/memory.c:4145 [inline] handle_pte_fault mm/memory.c:4385 [inline] __handle_mm_fault mm/memory.c:4520 [inline] handle_mm_fault+0x1844/0x24b0 mm/memory.c:4618 do_user_addr_fault+0x5fd/0xb80 arch/x86/mm/fault.c:1393 handle_page_fault arch/x86/mm/fault.c:1450 [inline] exc_page_fault+0xa1/0x1e0 arch/x86/mm/fault.c:1506 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580 RIP: 0033:0x7efdfa207bb0 Code: 00 48 83 3f 00 75 0b e9 5e ff ff ff 66 0f 1f 44 00 00 48 8b 05 29 24 21 00 48 85 c0 74 e9 55 48 89 e5 ff d0 5d e9 40 ff ff ff <48> 81 c7 e0 02 00 00 be 18 00 00 00 b8 11 01 00 00 0f 05 c3 66 90 RSP: 002b:00007ffc32345748 EFLAGS: 00010202 RAX: 00007efdfa207bb0 RBX: 00007ffc32345750 RCX: 00007efdf9f1b38b RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007efdfb0cb8c0 RBP: 00007ffc323457a0 R08: 00007efdfb0cb8c0 R09: 0000000000000210 R10: 00007efdfb0cbb90 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007efdfb0d9040