INFO: task syz-executor.5:17121 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28624 pid:17121 ppid: 13331 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common+0x125f/0x2f10 kernel/locking/mutex.c:1023 __mutex_lock kernel/locking/mutex.c:1093 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1108 device_lock include/linux/device.h:739 [inline] usbdev_release+0x7a/0x7c0 drivers/usb/core/devio.c:1074 __fput+0x352/0x7b0 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x10b/0x1e0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41920b RSP: 002b:00007ffe924268d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 000000000041920b RDX: 0000001b2ce2515c RSI: 00007f7db0f6ff68 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2ce23ab0 R10: 00007ffe9246f0b8 R11: 0000000000000293 R12: 000000000056c9e0 R13: 000000000056c9e0 R14: 000000000056bf60 R15: 0000000000050c6b Showing all locks held in the system: 2 locks held by kworker/u4:5/249: #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x82e/0xb00 kernel/sched/fair.c:10633 #1: ffffffff8c70fc00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by khungtaskd/1653: #0: ffffffff8c70fc00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8054: #0: ffff888013d72370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 5 locks held by kworker/1:17/13831: #0: ffff888015dfb138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfd0 kernel/workqueue.c:2248 #1: ffffc90001c8fd78 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x733/0xfd0 kernel/workqueue.c:2250 #2: ffff888144ad6218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:739 [inline] #2: ffff888144ad6218 (&dev->mutex){....}-{3:3}, at: hub_event+0x112/0xcb0 drivers/usb/core/hub.c:5537 #3: ffff88801d58b578 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3030 [inline] #3: ffff88801d58b578 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0xc1e/0x25b0 drivers/usb/core/hub.c:5154 #4: ffff888013e0cb68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_init+0x1ee/0x2ce0 drivers/usb/core/hub.c:4582 1 lock held by syz-executor.5/17121: #0: ffff888144ad6218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:739 [inline] #0: ffff888144ad6218 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x7a/0x7c0 drivers/usb/core/devio.c:1074 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1653 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x125/0x19e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 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: 4791 Comm: systemd-journal Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196 Code: 00 00 00 0f 1f 00 be 0d 00 00 00 48 c7 c7 a0 b7 74 8c e8 1f 1f 44 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0c 25 80 ef 01 00 65 8b 15 c4 71 89 7e f7 c2 00 01 ff 00 RSP: 0018:ffffc900011bfd78 EFLAGS: 00000287 RAX: ffffffff8135ae3b RBX: 0000000001000000 RCX: ffff888027073780 RDX: ffff888027073780 RSI: 0000000001000000 RDI: 000000001fffffff RBP: 0000000000000200 R08: ffffffff8135ae2d R09: 0000000000001000 R10: fffff940000e4bc1 R11: 0000000000000000 R12: ffff88801c97e500 R13: 0000000000000fe0 R14: ffff88801c97d520 R15: ffffffff81000000 FS: 00007fca549cb8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca51edd000 CR3: 000000002701b000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __phys_addr_symbol+0x2b/0x70 arch/x86/mm/physaddr.c:42 check_kernel_text_object mm/usercopy.c:135 [inline] __check_object_size+0x292/0x3f0 mm/usercopy.c:289 check_object_size include/linux/thread_info.h:171 [inline] strncpy_from_user+0x9f/0x350 lib/strncpy_from_user.c:137 getname_flags+0xf0/0x640 fs/namei.c:149 do_sys_openat2+0x5b/0x380 fs/open.c:1181 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0x1af/0x1e0 fs/open.c:1207 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fca53f5a840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fffa850ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fffa850ef70 RCX: 00007fca53f5a840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000056525cf21740 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000056525cf16040 R14: 00007fffa850ef30 R15: 000056525cf21560