================================ WARNING: inconsistent lock state 5.16.0-rc2-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.0/32315 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff88807aecf418 (&ctx->timeout_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] ffff88807aecf418 (&ctx->timeout_lock){?...}-{2:2}, at: io_poll_remove_all+0x49/0x319 fs/io_uring.c:5702 {IN-HARDIRQ-W} state was registered at: lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 io_link_timeout_fn+0x69/0x390 fs/io_uring.c:6904 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:399 [inline] io_queue_linked_timeout+0x239/0x3d0 fs/io_uring.c:6943 tctx_task_work+0x355/0x560 fs/io_uring.c:2206 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:214 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x180/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae irq event stamp: 15714 hardirqs last enabled at (15713): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (15713): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (15714): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (15714): [] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170 softirqs last enabled at (15638): [] local_bh_enable+0x5/0x20 include/linux/bottom_half.h:32 softirqs last disabled at (15636): [] local_bh_disable+0x5/0x20 include/linux/bottom_half.h:19 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ctx->timeout_lock); lock(&ctx->timeout_lock); *** DEADLOCK *** 2 locks held by syz-executor.0/32315: #0: ffff88807aecf3d8 (&ctx->completion_lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #0: ffff88807aecf3d8 (&ctx->completion_lock#2){+.+.}-{2:2}, at: io_poll_remove_all+0x38/0x319 fs/io_uring.c:5701 #1: ffff88807aecf418 (&ctx->timeout_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] #1: ffff88807aecf418 (&ctx->timeout_lock){?...}-{2:2}, at: io_poll_remove_all+0x49/0x319 fs/io_uring.c:5702 stack backtrace: CPU: 1 PID: 32315 Comm: syz-executor.0 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 print_usage_bug+0xa6d/0xea0 kernel/locking/lockdep.c:3933 mark_lock+0x168c/0x1e00 kernel/locking/lockdep.c:4605 mark_held_locks kernel/locking/lockdep.c:4206 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline] lockdep_hardirqs_on_prepare+0x26e/0x780 kernel/locking/lockdep.c:4292 trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:399 [inline] __io_poll_remove_one fs/io_uring.c:5669 [inline] io_poll_remove_one+0x248/0x610 fs/io_uring.c:5680 io_poll_remove_all+0x24c/0x319 fs/io_uring.c:5709 io_ring_ctx_wait_and_kill+0x22c/0x36a fs/io_uring.c:9534 io_uring_release+0x59/0x63 fs/io_uring.c:9554 __fput+0x3fc/0x870 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbe09cc4b32 Code: 00 00 00 00 00 0f 1f 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 3b 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 5b 5d c3 0f 1f 00 48 c7 c0 bc ff ff ff 64 RSP: 002b:00007fbe0723a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 RAX: 0000000020ff9000 RBX: 0000000000008011 RCX: 00007fbe09cc4b32 RDX: 0000000000000003 RSI: 0000000000020000 RDI: 0000000020ff9000 RBP: 0000000020ff9000 R08: 0000000000000006 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000040 R13: 0000000020ff9000 R14: 0000000020000000 R15: 0000000020ee8000