INFO: task syz-executor.4:12321 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28112 pid:12321 tgid:12314 ppid:12092 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x124/0x330 kernel/locking/rwsem.c:1528 inode_lock_shared include/linux/fs.h:801 [inline] lookup_slow fs/namei.c:1708 [inline] walk_component+0x342/0x5b0 fs/namei.c:2004 lookup_last fs/namei.c:2469 [inline] path_lookupat+0x17f/0x770 fs/namei.c:2493 filename_lookup+0x1e5/0x5b0 fs/namei.c:2522 user_path_at_empty+0x42/0x60 fs/namei.c:2929 user_path_at include/linux/namei.h:58 [inline] do_mount fs/namespace.c:3689 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbb8be7cee9 RSP: 002b:00007fbb8cb500c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbb8bfac050 RCX: 00007fbb8be7cee9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000000 RBP: 00007fbb8bec949e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fbb8bfac050 R15: 00007ffd7b326a88 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:7/2458: 2 locks held by kworker/1:2/2529: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000aacfd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 2 locks held by getty/4841: #0: ffff88802b8660a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/5084: 3 locks held by kworker/u9:5/5123: #0: ffff88807fedb948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc90003fa7d80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffff88801fe58d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:309 1 lock held by syz-executor.2/5463: 1 lock held by syz-executor.1/5753: 2 locks held by syz-executor.0/5963: 1 lock held by syz-executor.2/8786: 2 locks held by syz-executor.4/12317: 1 lock held by syz-executor.4/12321: #0: ffff888059014c18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline] #0: ffff888059014c18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline] #0: ffff888059014c18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004 4 locks held by syz-executor.3/12560: 1 lock held by syz-executor.3/12562: #0: ffff88805d2246d0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline] #0: ffff88805d2246d0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline] #0: ffff88805d2246d0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004