INFO: task syz-executor.1:6232 blocked for more than 144 seconds. Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:20288 pid:6232 tgid:6232 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 __super_lock fs/super.c:56 [inline] __super_lock_excl fs/super.c:71 [inline] deactivate_super+0xb5/0xf0 fs/super.c:505 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267 task_work_run+0x251/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8a55e7e297 RSP: 002b:00007ffe98042848 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8a55e7e297 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe98042900 RBP: 00007ffe98042900 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe980439b0 R13: 00007f8a55ed9636 R14: 000000000006df22 R15: 000000000000001c INFO: task syz-executor.0:8757 blocked for more than 144 seconds. Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23200 pid:8757 tgid:8755 ppid:7427 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 jfs_flush_journal+0x72c/0xec0 fs/jfs/jfs_logmgr.c:1564 jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:684 iterate_supers+0xc8/0x190 fs/super.c:923 ksys_sync+0xdb/0x1c0 fs/sync.c:104 __do_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f97ea07cf69 RSP: 002b:00007f97ead300c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f97ea1b3f80 RCX: 00007f97ea07cf69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f97ea0da6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f97ea1b3f80 R15: 00007ffff69bce38 Showing all locks held in the system: 3 locks held by kworker/u8:1/12: 1 lock held by khungtaskd/30: #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 3 locks held by kworker/0:2/780: #0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900037bfd00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900037bfd00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8e339378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #2: ffffffff8e339378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:939 4 locks held by kworker/u8:8/2461: 2 locks held by getty/4849: #0: ffff88802ab8a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/5091: 3 locks held by kworker/0:5/5183: 1 lock held by syz-executor.1/6232: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 1 lock held by syz-executor.0/8757: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.3/9170: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.2/9521: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.3/9793: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 3 locks held by syz-executor.3/10118: #0: ffff888045070d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:554 [inline] #0: ffff888045070d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x1d3/0x4e0 net/bluetooth/hci_core.c:2760 #1: ffff888045070078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x494/0xf60 net/bluetooth/hci_sync.c:5050 #2: ffffffff8e339378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #2: ffffffff8e339378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:939 1 lock held by syz-executor.5/10150: #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807f9fc0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 3 locks held by syz-executor.2/10339: #0: ffff88807bfecd88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:554 [inline] #0: ffff88807bfecd88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x1d3/0x4e0 net/bluetooth/hci_core.c:2760 #1: ffff88807bfec078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x494/0xf60 net/bluetooth/hci_sync.c:5050