INFO: task syz-executor.4:6072 blocked for more than 143 seconds. Not tainted 6.1.81-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:6072 ppid:4277 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1911 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 __flush_workqueue+0x580/0x11c4 kernel/workqueue.c:2864 nbd_start_device_ioctl drivers/block/nbd.c:1429 [inline] __nbd_ioctl drivers/block/nbd.c:1491 [inline] nbd_ioctl+0x8dc/0xc40 drivers/block/nbd.c:1531 blkdev_ioctl+0x408/0xb40 block/ioctl.c:618 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015a04e70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffff800015a05670 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffff800015a04ca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:318 2 locks held by getty/3984: #0: ffff0000d0c4e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001bc932f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188 2 locks held by kworker/u5:1/4255: #0: ffff0000ce7de938 ((wq_completion)nbd3-recv){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001df67c20 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 2 locks held by kworker/u5:2/4257: #0: ffff0000ce7f4938 ((wq_completion)nbd4-recv){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001df97c20 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 1 lock held by syz-executor.0/10976: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.0/10977: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.0/10980: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.0/10984: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.0/10989: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.0/10993: #0: ffff00012ba6a118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.2/10979: #0: ffff00012cdd6918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.2/10983: #0: ffff00012cdd6918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.2/10988: #0: ffff00012cdd6918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.2/10992: #0: ffff00012cdd6918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.1/10982: #0: ffff00012b044918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_get_event+0x50/0x4a4 drivers/usb/mon/mon_bin.c:747 1 lock held by syz-executor.1/10987: #0: ffff00012b044918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.1/10991: #0: ffff00012b044918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.1/10995: #0: ffff00012b044918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.3/10986: #0: ffff00012b047918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.3/10990: #0: ffff00012b047918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.3/10994: #0: ffff00012b047918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.3/10998: #0: ffff00012b047918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.3/11000: #0: ffff00012b047918 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.4/11003: #0: ffff00012d8b4d18 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor.4/11004: #0: ffff00012d8b4d18 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.4/11005: #0: ffff00012d8b4d18 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.4/11006: #0: ffff00012d8b4d18 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.4/11007: #0: ffff00012d8b4d18 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_flush+0x48/0x2fc drivers/usb/mon/mon_bin.c:878 1 lock held by syz-executor.0/11009: #0: ffff00012d643118 (&rp->fetch_lock){+.+.}-{3:3}, at: mon_bin_fetch+0x48/0x3a4 drivers/usb/mon/mon_bin.c:909 =============================================