INFO: task kworker/1:4:3641 blocked for more than 143 seconds. Not tainted 6.1.75-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:23480 pid:3641 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 usb_kill_urb+0x1c5/0x300 drivers/usb/core/urb.c:728 usb_start_wait_urb+0x1ac/0x510 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x2ad/0x4c0 drivers/usb/core/message.c:153 get_bMaxPacketSize0 drivers/usb/core/hub.c:4716 [inline] hub_port_init+0xba4/0x27e0 drivers/usb/core/hub.c:4913 hub_port_connect drivers/usb/core/hub.c:5363 [inline] hub_port_connect_change drivers/usb/core/hub.c:5574 [inline] port_event drivers/usb/core/hub.c:5730 [inline] hub_event+0x2b31/0x5730 drivers/usb/core/hub.c:5812 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Showing all locks held in the system: 4 locks held by kworker/u4:0/9: #0: ffff888012616938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc900000e7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #2: ffffffff8e289710 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:563 #3: ffffffff8d12f780 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:3986 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d12a490 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d12ac90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:318 [inline] #0: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:759 [inline] #0: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494 2 locks held by getty/3302: #0: ffff8880286b3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188 5 locks held by kworker/1:4/3641: #0: ffff888144efdd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc9000423fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #2: ffff888022495190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline] #2: ffff888022495190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5730 drivers/usb/core/hub.c:5758 #3: ffff8880224e84f8 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3122 [inline] #3: ffff8880224e84f8 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5330 [inline] #3: ffff8880224e84f8 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5574 [inline] #3: ffff8880224e84f8 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5730 [inline] #3: ffff8880224e84f8 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2471/0x5730 drivers/usb/core/hub.c:5812 #4: ffff8880222db068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5331 [inline] #4: ffff8880222db068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5574 [inline] #4: ffff8880222db068 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5730 [inline] #4: ffff8880222db068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x249e/0x5730 drivers/usb/core/hub.c:5812 2 locks held by kworker/u4:11/3955: 3 locks held by kworker/0:7/8873: 2 locks held by kworker/1:18/9398: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc9000503fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 6 locks held by syz-executor.4/10707: #0: ffff88807e97c460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x269/0xba0 fs/read_write.c:580 #1: ffff88803c139488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e7/0x4f0 fs/kernfs/file.c:321 #2: ffff888145795660 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20b/0x4f0 fs/kernfs/file.c:322 #3: ffffffff8dc086c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xf8/0x480 drivers/net/netdevsim/bus.c:209 #4: ffff88801e7ef0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline] #4: ffff88801e7ef0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1080 [inline] #4: ffff88801e7ef0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xb6/0x880 drivers/base/dd.c:1283 #5: ffff88803e03b2f8 (&devlink->lock_key#7){+.+.}-{3:3}, at: nsim_drv_remove+0x54/0x160 drivers/net/netdevsim/dev.c:1674 1 lock held by dhcpcd/10843: #0: ffff88808ec6ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff88808ec6ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff88808ec6ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x98/0x230 net/socket.c:1400 2 locks held by dhcpcd/10844: #0: ffff88802d682130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1745 [inline] #0: ffff88802d682130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198 #1: ffffffff8d12f8b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8d12f8b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x479/0x8a0 kernel/rcu/tree_exp.h:950 1 lock held by syz-executor.1/10849: #0: ffff888073d7aab8 (&nft_net->commit_mutex){+.+.}-{3:3}, at: nf_tables_valid_genid+0x27/0xa0 net/netfilter/nf_tables_api.c:10075 1 lock held by dhcpcd/10848: #0: ffff88802c92e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1745 [inline] #0: ffff88802c92e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198 6 locks held by syz-executor.2/10857: #0: ffff88808732f4e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2ba/0x360 fs/file.c:1062 #1: ffff888075324460 (sb_writers#10){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:933 [inline] #1: ffff888075324460 (sb_writers#10){.+.+}-{0:0}, at: do_writev+0x267/0x460 fs/read_write.c:977 #2: ffff888031412c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e7/0x4f0 fs/kernfs/file.c:321 #3: ffffffff8d152a68 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:442 [inline] #3: ffffffff8d152a68 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0xe5/0x290 kernel/cgroup/cgroup.c:1668 #4: ffffffff8cfc77f0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2444 [inline] #4: ffffffff8cfc77f0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_procs_write_start+0x19c/0x650 kernel/cgroup/cgroup.c:2950 #5: ffffffff8d152c50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2446 [inline] #5: ffffffff8d152c50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_procs_write_start+0x1b1/0x650 kernel/cgroup/cgroup.c:2950 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.75-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xf88/0xfd0 kernel/hung_task.c:377 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2984 Comm: syslogd Not tainted 6.1.75-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:bpf_lsm_socket_recvmsg+0x0/0x10 include/linux/lsm_hook_defs.h:297 Code: c0 c3 0f 1f 84 00 00 00 00 00 e8 9b 47 dc ff 31 c0 c3 0f 1f 84 00 00 00 00 00 e8 8b 47 dc ff 31 c0 c3 0f 1f 84 00 00 00 00 00 7b 47 dc ff 31 c0 c3 0f 1f 84 00 00 00 00 00 e8 6b 47 dc ff 31 RSP: 0018:ffffc9000b2afb18 EFLAGS: 00000246 RAX: 1ffffffff1961d63 RBX: ffffffff8cb0eb00 RCX: 0000000000000000 RDX: 00000000000000ff RSI: ffffc9000b2afbc0 RDI: ffff8880278b0600 RBP: ffffffff8cb0eb18 R08: ffffffff83fa4263 R09: ffffc9000b2afc18 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000b2afbc0 R13: ffff8880278b0600 R14: dffffc0000000000 R15: 00000000000000ff FS: 00007fde0b91b380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f010340ee00 CR3: 0000000028fd6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: security_socket_recvmsg+0x76/0xb0 security/security.c:2251 sock_recvmsg net/socket.c:1038 [inline] sock_read_iter+0x30c/0x4b0 net/socket.c:1121 call_read_iter include/linux/fs.h:2243 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7de/0xbe0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fde0ba6fb6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffdd92999f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fde0ba6fb6a RDX: 00000000000000ff RSI: 000055b6b3de2950 RDI: 0000000000000000 RBP: 000055b6b3de2910 R08: 0000000000000001 R09: 0000000000000000 R10: 00007fde0bc0e3a3 R11: 0000000000000246 R12: 000055b6b3de2999 R13: 000055b6b3de2950 R14: 0000000000000000 R15: 00007fde0bc4ca80