================================ WARNING: inconsistent lock state 5.16.0-rc2-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. iou-wrk-15185/15186 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff888030bc6418 (&ctx->timeout_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] ffff888030bc6418 (&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_timeout_fn+0x6a/0x220 fs/io_uring.c:5943 __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_timeout fs/io_uring.c:6223 [inline] io_issue_sqe+0x581d/0x9830 fs/io_uring.c:6662 __io_queue_sqe+0x2d/0x780 fs/io_uring.c:6976 io_queue_sqe fs/io_uring.c:7018 [inline] io_submit_state_end fs/io_uring.c:7233 [inline] io_submit_sqes+0x9ff3/0xa7c0 fs/io_uring.c:7338 __do_sys_io_uring_enter fs/io_uring.c:10043 [inline] __se_sys_io_uring_enter+0x21f/0x1cb0 fs/io_uring.c:9985 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae irq event stamp: 4878 hardirqs last enabled at (4877): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (4877): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (4878): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (4878): [] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170 softirqs last enabled at (3394): [] __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636 softirqs last disabled at (3379): [] __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636 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 iou-wrk-15185/15186: #0: ffff888030bc63d8 (&ctx->completion_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #0: ffff888030bc63d8 (&ctx->completion_lock){+.+.}-{2:2}, at: io_poll_remove_all+0x38/0x319 fs/io_uring.c:5701 #1: ffff888030bc6418 (&ctx->timeout_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] #1: ffff888030bc6418 (&ctx->timeout_lock){?...}-{2:2}, at: io_poll_remove_all+0x49/0x319 fs/io_uring.c:5702 stack backtrace: CPU: 1 PID: 15186 Comm: iou-wrk-15185 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 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x705/0x24f0 kernel/exit.c:832 io_worker_exit+0x442/0x450 fs/io-wq.c:234 io_wqe_worker+0x870/0x870 fs/io-wq.c:651 ret_from_fork+0x1f/0x30