================================ WARNING: inconsistent lock state 5.10.0-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/10893 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff8881431f04a8 (&file_data->lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff8881431f04a8 (&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+0x3b2c/0x3fe0 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: 1596 hardirqs last enabled at (1596): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (1596): [] _raw_spin_unlock_irqrestore+0x2e/0x60 kernel/locking/spinlock.c:191 hardirqs last disabled at (1595): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1595): [] _raw_spin_lock_irqsave+0x4d/0xa0 kernel/locking/spinlock.c:159 softirqs last enabled at (1370): [] asm_call_irq_on_stack+0xf/0x20 softirqs last disabled at (1401): [] 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 *** 4 locks held by syz-executor.0/10893: #0: ffff888029a8b6d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #0: ffff888029a8b6d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pte_range+0x1c9/0x1b30 mm/memory.c:1211 #1: ffffffff8bce7ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 #2: ffffffff8bce7b80 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire+0x0/0x20 kernel/rcu/tree.c:1374 #3: ffffffff8bce7ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:252 stack backtrace: CPU: 1 PID: 10893 Comm: syz-executor.0 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:rcu_read_lock_sched_held+0x0/0xb0 kernel/rcu/update.c:118 Code: 16 96 7f 02 e9 fc fd ff ff e8 6c d5 dd 07 66 90 66 2e 0f 1f 84 00 00 00 00 00 e9 6b 2a 1d 00 90 66 2e 0f 1f 84 00 00 00 00 00 <53> 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 e8 88 da RSP: 0018:ffffc90001faf708 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802b8f9ac0 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d0e5d28 RBP: ffffffff81bcb510 R08: dffffc0000000000 R09: fffffbfff1a1cba6 R10: fffffbfff1a1cba6 R11: 0000000000000000 R12: ffffea00019b01c0 R13: 00007f04ad521000 R14: ffff8880128b2900 R15: ffffffff8bce7ac0 trace_lock_release+0x61/0x140 include/trace/events/lock.h:58 lock_release+0x27/0x6b0 kernel/locking/lockdep.c:5448 zap_pte_range+0x8f7/0x1b30 mm/memory.c:1253 zap_pmd_range mm/memory.c:1357 [inline] zap_pud_range mm/memory.c:1386 [inline] zap_p4d_range mm/memory.c:1407 [inline] unmap_page_range+0x4d6/0x8a0 mm/memory.c:1428 unmap_vmas+0x15d/0x2c0 mm/memory.c:1505 exit_mmap+0x276/0x550 mm/mmap.c:3220 __mmput+0x113/0x370 kernel/fork.c:1081 exit_mm+0x5bc/0x660 kernel/exit.c:500 do_exit+0x5bf/0x22e0 kernel/exit.c:810 do_group_exit+0x161/0x2c0 kernel/exit.c:920 get_signal+0x13da/0x1d90 kernel/signal.c:2792 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0xac/0x1a0 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x48/0x190 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: Unable to access opcode bytes at RIP 0x45e12f. RSP: 002b:00007f04ab767cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 000000000119bf88 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000119bf88 RBP: 000000000119bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffcf39be49f R14: 00007f04ab7689c0 R15: 000000000119bf8c