INFO: task syz.0.16:6577 blocked for more than 143 seconds. Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:0 pid:6577 tgid:6577 ppid:6522 flags:0x00000001 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1744/0x27f0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6848 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6905 __mutex_lock_common+0xeec/0x28f4 kernel/locking/mutex.c:665 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 bdev_release+0x168/0x644 block/bdev.c:1086 blkdev_release+0x20/0x34 block/fops.c:635 __fput+0x1bc/0x75c fs/file_table.c:450 ____fput+0x20/0x30 fs/file_table.c:478 task_work_run+0x230/0x2e0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 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:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.0.16:6578 blocked for more than 143 seconds. Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:0 pid:6578 tgid:6577 ppid:6522 flags:0x00000009 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1744/0x27f0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6848 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6905 __mutex_lock_common+0xeec/0x28f4 kernel/locking/mutex.c:665 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 bdev_release+0x168/0x644 block/bdev.c:1086 blkdev_release+0x20/0x34 block/fops.c:635 __fput+0x1bc/0x75c fs/file_table.c:450 ____fput+0x20/0x30 fs/file_table.c:478 task_work_run+0x230/0x2e0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 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:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff80008fb83160 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u9:1/5988: #0: ffff0000ce5f2948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff8000a26a7c20 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff0000d6fb8d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x194/0x34c net/bluetooth/hci_sync.c:331 2 locks held by getty/6184: #0: ffff0000d27060a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba1b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 1 lock held by udevd/6551: #0: ffff0000ca2d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.0.16/6577: #0: ffff0000ca2d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.0.16/6578: #0: ffff0000ca2d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6579: #0: ffff0000ca2dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by udevd/6589: #0: ffff0000ca8d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.1.17/6600: #0: ffff0000ca2dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.1.17/6601: #0: ffff0000ca2dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6605: #0: ffff0000ca3f14c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.2.18/6616: #0: ffff0000ca3f14c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.2.18/6617: #0: ffff0000ca3f14c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6621: #0: ffff0000ca3f54c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.3.19/6632: #0: ffff0000ca3f54c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.3.19/6633: #0: ffff0000ca3f54c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6639: #0: ffff0000ca8194c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.4.20/6659: #0: ffff0000ca8194c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.4.20/6660: #0: ffff0000ca8194c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6664: #0: ffff0000ca81d4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.5.21/6685: #0: ffff0000ca81d4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.5.21/6686: #0: ffff0000ca81d4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.6.22/6710: #0: ffff0000ca8d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.6.22/6711: #0: ffff0000ca8d94c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6714: #0: ffff0000c9eb44c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.7.23/6736: #0: ffff0000c9eb44c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.7.23/6737: #0: ffff0000c9eb44c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6738: #0: ffff0000ca8dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.8.24/6762: #0: ffff0000ca8dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.8.24/6764: #0: ffff0000ca8dd4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by udevd/6771: #0: ffff0000ca9b84c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xd0/0xbd0 block/bdev.c:903 1 lock held by syz.9.25/6795: #0: ffff0000ca9b84c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 1 lock held by syz.9.25/6796: #0: ffff0000ca9b84c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x168/0x644 block/bdev.c:1086 =============================================