INFO: task syz-executor.0:7017 blocked for more than 143 seconds. Not tainted 5.17.0-rc5-syzkaller-00317-g52a025546731 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27792 pid: 7017 ppid: 3654 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0xa94/0x4910 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9875 io_uring_clean_tctx fs/io_uring.c:9891 [inline] io_uring_cancel_generic+0x5c3/0x695 fs/io_uring.c:9969 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x523/0x2a30 kernel/exit.c:761 do_group_exit+0xd2/0x2f0 kernel/exit.c:935 get_signal+0x45a/0x2490 kernel/signal.c:2863 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/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: 0033:0x7f5fdb497049 RSP: 002b:00007f5fd9e0c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: fffffffffffffdfc RBX: 00007f5fdb5a9f60 RCX: 00007f5fdb497049 RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f5fdb4f108d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5fdbaddb1f R14: 00007f5fd9e0c300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bb845e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 3 locks held by kworker/u4:3/54: 2 locks held by getty/3282: #0: ffff88814a3ae098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075 4 locks held by kworker/0:13/6809: #0: ffff8880b9c39c58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489 #1: ffff8880b9c27948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:891 #2: ffff8880b9c28270 (krc.lock){..-.}-{2:2}, at: kfree_rcu_monitor+0x2f/0x830 kernel/rcu/tree.c:3373 #3: ffff8880b9c28498 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:946 4 locks held by iou-sqp-6999/7000: 1 lock held by syz-executor.0/7017: #0: ffff88807a56c0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9875 2 locks held by iou-sqp-7017/7018: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc5-syzkaller-00317-g52a025546731 #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 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5073 Comm: kworker/u4:12 Not tainted 5.17.0-rc5-syzkaller-00317-g52a025546731 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy9 ieee80211_iface_work RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline] RIP: 0010:__lock_acquire+0xbcc/0x56c0 kernel/locking/lockdep.c:5024 Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 40 49 fc 8f e8 6c 0c 63 00 48 0f a3 1d b4 27 9f 0e <0f> 83 fd 0c 00 00 48 8d 1c 5b 48 c1 e3 06 48 81 c3 60 4d fc 8f 48 RSP: 0018:ffffc90000007830 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000957 RCX: ffffffff815d2184 RDX: fffffbfff1ff894e RSI: 0000000000000008 RDI: ffffffff8ffc4a68 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ffc4a6f R10: fffffbfff1ff894d R11: 0000000000000001 R12: ffff888079520b28 R13: ffff888079520000 R14: ffffffff8d9457a8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c003c38a18 CR3: 000000006c8d0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 io_req_task_work_add+0x89/0x720 fs/io_uring.c:2384 io_poll_wake+0x28e/0x500 fs/io_uring.c:5673 __wake_up_common+0x147/0x650 kernel/sched/wait.c:108 __wake_up_common_lock+0xd0/0x130 kernel/sched/wait.c:138 snd_pcm_update_state+0x46a/0x540 sound/core/pcm_lib.c:204 snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817 snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849 dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 do_softirq.part.0+0xde/0x130 kernel/softirq.c:459 do_softirq kernel/softirq.c:451 [inline] __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383 spin_unlock_bh include/linux/spinlock.h:394 [inline] cfg80211_bss_update+0x26b/0x2070 net/wireless/scan.c:1787 cfg80211_inform_single_bss_frame_data+0x731/0xf40 net/wireless/scan.c:2464 cfg80211_inform_bss_frame_data+0xa7/0xb50 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x35b/0xb00 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x19cf/0x3150 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0xa69/0xd00 net/mac80211/iface.c:1581 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 66 81 e3 ff 1f and $0x1fff,%bx 5: 0f b7 db movzwl %bx,%ebx 8: be 08 00 00 00 mov $0x8,%esi d: 48 89 d8 mov %rbx,%rax 10: 48 c1 f8 06 sar $0x6,%rax 14: 48 8d 3c c5 40 49 fc lea -0x7003b6c0(,%rax,8),%rdi 1b: 8f 1c: e8 6c 0c 63 00 callq 0x630c8d 21: 48 0f a3 1d b4 27 9f bt %rbx,0xe9f27b4(%rip) # 0xe9f27dd 28: 0e * 29: 0f 83 fd 0c 00 00 jae 0xd2c <-- trapping instruction 2f: 48 8d 1c 5b lea (%rbx,%rbx,2),%rbx 33: 48 c1 e3 06 shl $0x6,%rbx 37: 48 81 c3 60 4d fc 8f add $0xffffffff8ffc4d60,%rbx 3e: 48 rex.W