INFO: task kworker/0:1:12 blocked for more than 143 seconds. Not tainted 5.9.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:25936 pid: 12 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0xec9/0x2280 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:696 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:691 usb_start_wait_urb+0x24a/0x2b0 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 usb_get_descriptor+0xc5/0x1b0 drivers/usb/core/message.c:655 usb_get_device_descriptor+0x81/0xf0 drivers/usb/core/message.c:927 hub_port_init+0x78f/0x2d80 drivers/usb/core/hub.c:4784 hub_port_connect drivers/usb/core/hub.c:5140 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1e64/0x3e60 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/0:2:2473 blocked for more than 145 seconds. Not tainted 5.9.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:26512 pid: 2473 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0xec9/0x2280 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:696 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:691 usb_start_wait_urb+0x24a/0x2b0 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 hub_port_init+0x11ae/0x2d80 drivers/usb/core/hub.c:4689 hub_port_connect drivers/usb/core/hub.c:5140 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1e64/0x3e60 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 5 locks held by kworker/0:1/12: #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90000d2fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffff8880a8532218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:785 [inline] #2: ffff8880a8532218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1b6/0x3e60 drivers/usb/core/hub.c:5522 #3: ffff8880a91cf588 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3012 [inline] #3: ffff8880a91cf588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5139 [inline] #3: ffff8880a91cf588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] #3: ffff8880a91cf588 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5494 [inline] #3: ffff8880a91cf588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e4f/0x3e60 drivers/usb/core/hub.c:5576 #4: ffff8880a8cda968 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_init+0x1b6/0x2d80 drivers/usb/core/hub.c:4563 1 lock held by khungtaskd/1171: #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5852 5 locks held by kworker/0:2/2473: #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88821aec4538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90008477da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffff888217893218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:785 [inline] #2: ffff888217893218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1b6/0x3e60 drivers/usb/core/hub.c:5522 #3: ffff88821789f588 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3012 [inline] #3: ffff88821789f588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5139 [inline] #3: ffff88821789f588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] #3: ffff88821789f588 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5494 [inline] #3: ffff88821789f588 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e4f/0x3e60 drivers/usb/core/hub.c:5576 #4: ffff88809ea6ad68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_init+0x1b6/0x2d80 drivers/usb/core/hub.c:4563 1 lock held by systemd-udevd/3926: 1 lock held by in:imklog/6554: #0: ffff8880a22841b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 1 lock held by syz-executor.3/7114: #0: ffff8880ae535e18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1292 [inline] #0: ffff8880ae535e18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x287/0x2280 kernel/sched/core.c:4445 1 lock held by syz-executor.4/7153: #0: ffff8880ae535e18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1292 [inline] #0: ffff8880ae535e18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x287/0x2280 kernel/sched/core.c:4445 4 locks held by kworker/u4:9/13220: 2 locks held by kworker/u4:13/13228: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13222 Comm: kworker/u4:10 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy7 ieee80211_iface_work RIP: 0010:arch_static_branch_jump arch/x86/include/asm/jump_label.h:41 [inline] RIP: 0010:slab_want_init_on_alloc mm/slab.h:607 [inline] RIP: 0010:slab_alloc mm/slab.c:3313 [inline] RIP: 0010:__do_kmalloc mm/slab.c:3657 [inline] RIP: 0010:__kmalloc+0x148/0x360 mm/slab.c:3668 Code: 24 20 0f 85 a1 01 00 00 48 83 3d 8a b3 45 08 00 0f 84 b8 01 00 00 48 8b 3c 24 57 9d 0f 1f 44 00 00 4c 8b 44 24 20 41 0f 18 08 2d 01 00 00 41 f7 c5 00 01 00 00 0f 85 42 01 00 00 44 23 2d ff RSP: 0018:ffffc90007297470 EFLAGS: 00000286 RAX: 000000000134299d RBX: 0000000000000a20 RCX: ffffffff815b7ef2 RDX: ffff88805c94a0c0 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8880aa040200 R08: ffff88809faea480 R09: ffffffff8d0c0a3f R10: fffffbfff1a18147 R11: 0000000000000000 R12: 0000000000000028 R13: 0000000000000a20 R14: ffff8880aa040200 R15: ffffffff87ce827e FS: 0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f405ff8d000 CR3: 0000000093392000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmalloc include/linux/slab.h:559 [inline] ieee802_11_parse_elems_crc+0x11e/0xf00 net/mac80211/util.c:1388 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2025 [inline] ieee80211_rx_mgmt_probe_beacon+0x188/0x1670 net/mac80211/ibss.c:1611 ieee80211_ibss_rx_queued_mgmt+0xd6b/0x1640 net/mac80211/ibss.c:1641 ieee80211_iface_work+0x5ea/0x8f0 net/mac80211/iface.c:1417 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294