INFO: task syz-executor.0:18830 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27152 pid:18830 tgid:18830 ppid:12303 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 device_lock include/linux/device.h:990 [inline] usbdev_release+0x87/0x470 drivers/usb/core/devio.c:1096 __fput+0x270/0xb80 fs/file_table.c:423 __fput_sync+0x47/0x50 fs/file_table.c:508 __do_sys_close fs/open.c:1557 [inline] __se_sys_close fs/open.c:1542 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1542 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fa897c7cc9a RSP: 002b:00007ffc3249faa0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa897c7cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b32420000 R09: 0000000000000013 R10: 000000008ac85e63 R11: 0000000000000293 R12: 00007fa897803838 R13: ffffffffffffffff R14: 00007fa897800000 R15: 00000000000e6ede Showing all locks held in the system: 5 locks held by kworker/0:1/8: #0: ffff88801ae89d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x128f/0x1a50 kernel/workqueue.c:3229 #1: ffffc900000d7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ff/0x1a50 kernel/workqueue.c:3230 #2: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #2: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e20 drivers/usb/core/hub.c:5811 #3: ffff8880235e6510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3169 [inline] #3: ffff8880235e6510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5380 [inline] #3: ffff8880235e6510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] #3: ffff8880235e6510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline] #3: ffff8880235e6510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2802/0x4e20 drivers/usb/core/hub.c:5865 #4: ffff888023452568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5381 [inline] #4: ffff888023452568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] #4: ffff888023452568 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline] #4: ffff888023452568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x282b/0x4e20 drivers/usb/core/hub.c:5865 1 lock held by khungtaskd/30: #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 6 locks held by kworker/u8:8/2437: 2 locks held by getty/4817: #0: ffff88802e8e20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015d02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.0/18830: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x87/0x470 drivers/usb/core/devio.c:1096 1 lock held by syz-executor.4/18937: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.2/18938: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.1/19052: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/19183: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/19186: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.3/19299: #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff8880235e3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b8/0x8c0 drivers/usb/core/devio.c:1051 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf86/0x1210 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2437 Comm: kworker/u8:8 Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200 Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 a4 e6 76 7e 65 8b 05 a5 e6 76 7e a9 00 01 RSP: 0018:ffffc90009a1fb90 EFLAGS: 00000287 RAX: 0000000000000000 RBX: 0000000000000400 RCX: ffffffff8a8f065e RDX: ffff8880291d8000 RSI: 0000000000000236 RDI: 0000000000000004 RBP: 0000000000000236 R08: 0000000000000004 R09: 0000000000000236 R10: 0000000000000400 R11: 0000000000000002 R12: ffff88802151ea80 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c007b0d250 CR3: 000000000d57a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:406 [inline] batadv_nc_worker+0x12a/0x10f0 net/batman-adv/network-coding.c:719 process_one_work+0x9a2/0x1a50 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243