================================ WARNING: inconsistent lock state 5.16.0-rc2-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.1/14917 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888082a9d418 (&ctx->timeout_lock){?.+.}-{2:2}, at: io_timeout_fn+0x6f/0x360 fs/io_uring.c:5943 {HARDIRQ-ON-W} state was registered at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4244 trace_hardirqs_on+0x5b/0x1c0 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 fs/io_uring.c:5654 [inline] io_poll_remove_one+0x236/0x870 fs/io_uring.c:5680 io_poll_remove_all+0x1af/0x235 fs/io_uring.c:5709 io_ring_ctx_wait_and_kill+0x1cc/0x322 fs/io_uring.c:9534 io_uring_release+0x42/0x46 fs/io_uring.c:9554 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 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+0x27e/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae irq event stamp: 3456 hardirqs last enabled at (3455): [] asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:643 hardirqs last disabled at (3456): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (2016): [] rcu_read_unlock_bh include/linux/rcupdate.h:754 [inline] softirqs last enabled at (2016): [] __dev_queue_xmit+0x193c/0x3630 net/core/dev.c:4253 softirqs last disabled at (2002): [] __dev_queue_xmit+0x1e3/0x3630 net/core/dev.c:4153 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ctx->timeout_lock); lock(&ctx->timeout_lock); *** DEADLOCK *** 1 lock held by syz-executor.1/14917: #0: ffff888082a9d0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: tctx_task_work+0x2b3/0x630 fs/io_uring.c:2203 stack backtrace: CPU: 1 PID: 14917 Comm: syz-executor.1 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+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:203 [inline] valid_state kernel/locking/lockdep.c:3945 [inline] mark_lock_irq kernel/locking/lockdep.c:4148 [inline] mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4605 mark_usage kernel/locking/lockdep.c:4497 [inline] __lock_acquire+0x149d/0x54a0 kernel/locking/lockdep.c:4981 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 io_timeout_fn+0x6f/0x360 fs/io_uring.c:5943 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee cd 15 f8 48 89 ef e8 36 44 16 f8 e8 01 fe 36 f8 fb bf 01 00 00 00 06 0e 09 f8 65 8b 05 ef 90 bb 76 85 c0 74 02 5d c3 e8 0b 66 b9 RSP: 0018:ffffc90006237c40 EFLAGS: 00000206 RAX: 0000000000000d7d RBX: 0000000000000000 RCX: 1ffffffff1ff9d8e RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff888082a9d400 R08: 0000000000000001 R09: ffffffff8ff72af7 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803d0dd300 R14: 0000000003938700 R15: ffff888034b84b40 spin_unlock_irq include/linux/spinlock.h:399 [inline] io_timeout fs/io_uring.c:6223 [inline] io_issue_sqe+0x3789/0x7010 fs/io_uring.c:6662 __io_queue_sqe fs/io_uring.c:6976 [inline] io_req_task_submit+0xce/0x450 fs/io_uring.c:2282 tctx_task_work+0x1b3/0x630 fs/io_uring.c:2206 task_work_run+0xdd/0x1a0 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+0x256/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6094e7fae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f60923f5188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000200 RBX: 00007f6094f92f60 RCX: 00007f6094e7fae9 RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000003 RBP: 00007f6094ed9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4a778eaf R14: 00007f60923f5300 R15: 0000000000022000 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ---------------- Code disassembly (best guess): 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 55 push %rbp 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fd mov %rdi,%rbp e: 48 83 c7 18 add $0x18,%rdi 12: e8 ee cd 15 f8 callq 0xf815ce05 17: 48 89 ef mov %rbp,%rdi 1a: e8 36 44 16 f8 callq 0xf8164455 1f: e8 01 fe 36 f8 callq 0xf836fe25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 06 0e 09 f8 callq 0xf8090e35 <-- trapping instruction 2f: 65 8b 05 ef 90 bb 76 mov %gs:0x76bb90ef(%rip),%eax # 0x76bb9125 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp 3b: c3 retq 3c: e8 .byte 0xe8 3d: 0b 66 b9 or -0x47(%rsi),%esp