INFO: task syz-executor.1:13277 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:13277 tgid:13273 ppid:11265 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 bdev_release+0x100/0x870 block/bdev.c:969 blkdev_release+0x40/0x54 block/fops.c:631 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 get_signal+0x13f4/0x15ec kernel/signal.c:2669 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee74ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 3 locks held by kworker/u5:0/50: #0: ffff0000e6879538 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff800093f07c20 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 #2: ffff000107d01060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x194/0x34c net/bluetooth/hci_sync.c:305 2 locks held by getty/5927: #0: ffff0000cca950a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094fd72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by udevd/10880: #0: ffff0000ca67b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by udevd/11252: #0: ffff0000ca5ac4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by udevd/11398: #0: ffff0000ca6094c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.4/12868: #0: ffff0001b4035f58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:559 [inline] #0: ffff0001b4035f58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1385 [inline] #0: ffff0001b4035f58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1699 [inline] #0: ffff0001b4035f58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2e0/0x24b4 kernel/sched/core.c:6643 1 lock held by syz-executor.1/13277: #0: ffff0000ca6094c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 1 lock held by syz-executor.3/13559: #0: ffff0000ca67b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 1 lock held by syz-executor.1/13669: #0: ffff0000ca6094c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.0/13887: #0: ffff0000ca5ac4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 1 lock held by syz-executor.3/14044: #0: ffff0000ca67b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.1/14139: #0: ffff0000ca6094c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 =============================================