audit: type=1800 audit(1669471569.255:14124): pid=29439 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=13926 res=0 block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 INFO: task kworker/1:29:11442 blocked for more than 140 seconds. block nbd4: Device being setup by another task Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 kworker/1:29 D26784 11442 2 0x80000000 Workqueue: usb_hub_wq hub_event block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 block nbd4: Device being setup by another task schedule+0x8d/0x1b0 kernel/sched/core.c:3561 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:697 block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 block nbd4: NBD_DISCONNECT usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:692 usb_start_wait_urb+0x252/0x4c0 drivers/usb/core/message.c:63 block nbd4: Send disconnect failed -32 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152 hub_port_init+0x12dc/0x3120 drivers/usb/core/hub.c:4704 hub_port_connect drivers/usb/core/hub.c:5070 [inline] hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] port_event drivers/usb/core/hub.c:5361 [inline] hub_event+0x1ccd/0x44a0 drivers/usb/core/hub.c:5441 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000f8118709 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 audit: type=1800 audit(1669471569.995:14125): pid=29471 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=13890 res=0 1 lock held by in:imklog/7823: block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT #0: 000000006a141b81 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 block nbd4: Send disconnect failed -32 1 lock held by syz-executor.2/32095: netlink: 16 bytes leftover after parsing attributes in process `syz-executor.3'. #0: 000000006ca0f54c (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: 000000006ca0f54c (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 block nbd3: NBD_DISCONNECT block nbd3: Send disconnect failed -32 5 locks held by kworker/1:29/11442: block nbd4: Device being setup by another task block nbd4: NBD_DISCONNECT #0: 000000008efe95cd ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 block nbd4: Send disconnect failed -32 #1: 00000000a8e39005 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000041ba585 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #2: 00000000041ba585 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387 #3: 00000000fa91daa4 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline] #3: 00000000fa91daa4 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline] #3: 00000000fa91daa4 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] #3: 00000000fa91daa4 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline] #3: 00000000fa91daa4 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441 sit: non-ECT from 0.0.0.0 with TOS=0x2 #4: 000000005c601b81 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578 block nbd4: NBD_DISCONNECT block nbd4: Send disconnect failed -32 2 locks held by kworker/1:1/13043: #0: 0000000071d8dfff ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000ff0f039c ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 2 locks held by syz-executor.3/29503: #0: 00000000eba2c4fb (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000eba2c4fb (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598 #1: 000000006ca0f54c (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #1: 000000006ca0f54c (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 3 locks held by syz-executor.4/29493: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12229 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy41 ieee80211_iface_work RIP: 0010:cfg80211_inform_bss_frame_data+0x2/0xeb0 net/wireless/scan.c:1223 Code: a4 e9 16 fa e9 11 fc ff ff 48 c7 c7 88 d7 10 8b e8 73 e8 16 fa e9 c6 fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 57 <41> 56 41 55 49 89 cd 41 54 49 89 fc 55 48 89 d5 53 48 89 f3 48 81 RSP: 0018:ffff88805152f5e0 EFLAGS: 00000246 RAX: ffff888051e29ac0 RBX: ffff888051e2b4f8 RCX: 000000000000004c RDX: ffff8880985df2d0 RSI: ffff88805152f668 RDI: ffff888051e294a0 RBP: 0000000000000001 R08: 0000000000480020 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880985df2d0 R13: ffff88805152f828 R14: ffff88809dd2b168 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c006cb4000 CR3: 00000000a1182000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_bss_info_update+0x42d/0x1800 net/mac80211/scan.c:105 ieee80211_rx_bss_info net/mac80211/ibss.c:1125 [inline] ieee80211_rx_mgmt_probe_beacon+0xb4f/0x15c0 net/mac80211/ibss.c:1607 ieee80211_ibss_rx_queued_mgmt+0xe27/0x18b0 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415