INFO: task kworker/1:1:46 blocked for more than 143 seconds. Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:21016 pid:46 tgid:46 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 adu_disconnect+0xca/0x2b0 drivers/usb/misc/adutux.c:770 usb_unbind_interface+0x25e/0x940 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x503/0x7c0 drivers/base/dd.c:1296 bus_remove_device+0x34f/0x420 drivers/base/bus.c:576 device_del+0x57a/0x9b0 drivers/base/core.c:3864 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1418 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2304 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1ebc/0x5150 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 2 locks held by kworker/u8:2/35: 6 locks held by kworker/1:1/46: #0: ffff88802068c948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88802068c948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90000b67d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000b67d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff888144b80190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888144b80190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff888060a84190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff888060a84190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2295 #4: ffff88805425d160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff88805425d160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff88805425d160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffffffff8f685388 (adutux_mutex){+.+.}-{3:3}, at: adu_disconnect+0xca/0x2b0 drivers/usb/misc/adutux.c:770 4 locks held by kworker/u8:4/61: #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc900015c7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc900015c7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc52d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580 #3: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #3: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976 5 locks held by kworker/u8:6/2542: 2 locks held by getty/4990: #0: ffff88802e2830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 6 locks held by kworker/1:7/5301: #0: ffff88802068c948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88802068c948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9000443fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000443fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff888028148190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888028148190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff88807ec24190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff88807ec24190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2295 #4: ffff8880270bc160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff8880270bc160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff8880270bc160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffffffff8f685388 (adutux_mutex){+.+.}-{3:3}, at: adu_disconnect+0xca/0x2b0 drivers/usb/misc/adutux.c:770 1 lock held by syz.1.670/9402: #0: ffffffff8f685388 (adutux_mutex){+.+.}-{3:3}, at: adu_release+0xbf/0x870 drivers/usb/misc/adutux.c:323 1 lock held by syz.2.921/11008: #0: ffff888028148190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #0: ffff888028148190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x770 drivers/usb/core/devio.c:1051 1 lock held by syz-executor/12336: #0: ffffffff8fcd1dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcd1dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 1 lock held by syz.4.1148/12402: 2 locks held by syz-executor/12425: 1 lock held by syz.1.1155/12429: 1 lock held by syz.1.1155/12430: #0: ffffffff8fcd1dc8 (rtnl_mutex){+.+.}-{3:3}, at: do_ip_getsockopt+0x10f5/0x2940 net/ipv4/ip_sockglue.c:1702 1 lock held by syz.1.1155/12432: 6 locks held by dhcpcd-run-hook/12434: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 12434 Comm: dhcpcd-run-hook Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:mark_lock+0x14b/0x360 kernel/locking/lockdep.c:4746 Code: 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 0a c9 8d 00 41 bc 01 00 00 00 44 85 33 74 16 44 89 e0 48 83 c4 10 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 14 37 ff ff 85 c0 0f 84 3d RSP: 0018:ffffc900048af358 EFLAGS: 00000086 RAX: 0000000000000001 RBX: ffff888066e9c708 RCX: ffffffff8170ce6a RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942c5898 RBP: 0000000000000006 R08: ffffffff942c589f R09: 1ffffffff2858b13 R10: dffffc0000000000 R11: fffffbfff2858b14 R12: ffff888066e9c728 R13: dffffc0000000000 R14: 0000000000000040 R15: ffff888066e9c708 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f52d837d5e8 CR3: 00000000682f0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks kernel/locking/lockdep.c:4321 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4347 [inline] lockdep_hardirqs_on_prepare+0x3a5/0x780 kernel/locking/lockdep.c:4406 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 kasan_quarantine_put+0xdc/0x230 mm/kasan/quarantine.c:234 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x1a2/0x420 mm/slub.c:4681 anon_vma_chain_free mm/rmap.c:148 [inline] unlink_anon_vmas+0x297/0x5f0 mm/rmap.c:422 free_pgtables+0x567/0x840 mm/memory.c:409 exit_mmap+0x48e/0xc40 mm/mmap.c:1875 __mmput+0x115/0x390 kernel/fork.c:1347 exec_mmap+0x680/0x710 fs/exec.c:1014 begin_new_exec+0x12c0/0x2050 fs/exec.c:1280 load_elf_binary+0x966/0x2710 fs/binfmt_elf.c:996 search_binary_handler fs/exec.c:1752 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0xaf8/0x1770 fs/exec.c:1845 do_execveat_common+0x55f/0x6f0 fs/exec.c:1952 do_execve fs/exec.c:2026 [inline] __do_sys_execve fs/exec.c:2102 [inline] __se_sys_execve fs/exec.c:2097 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2097 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f52d82caef7 Code: Unable to access opcode bytes at 0x7f52d82caecd. RSP: 002b:00007ffd60e01d08 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 0000562dfd5e5ec8 RCX: 00007f52d82caef7 RDX: 0000562dfd5e5f08 RSI: 0000562dfd5e5ec8 RDI: 0000562dfd5e5f98 RBP: 0000562dfd5e5f98 R08: 0000562dfd5e5f9d R09: 00007ffd60e05eb8 R10: 00007f52d84c9088 R11: 0000000000000246 R12: 0000562dfd5e5f08 R13: 00007f52d8478904 R14: 0000562dfd5e5f08 R15: 0000000000000000