INFO: task syz.0.16:7002 blocked for more than 143 seconds. Not tainted 6.14.0-rc6-syzkaller-00145-g695caca9345a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:0 pid:7002 tgid:7000 ppid:6916 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5378 [inline] __schedule+0x1384/0x25a0 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6857 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6914 __mutex_lock_common+0xd30/0x24b8 kernel/locking/mutex.c:662 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 __lookup_slow+0x258/0x37c fs/namei.c:1793 lookup_slow+0x60/0x84 fs/namei.c:1810 walk_component fs/namei.c:2114 [inline] link_path_walk+0x77c/0xc48 fs/namei.c:2479 path_parentat fs/namei.c:2683 [inline] __filename_parentat+0x214/0x60c fs/namei.c:2707 filename_parentat fs/namei.c:2725 [inline] filename_create+0xf0/0x468 fs/namei.c:4063 do_mkdirat+0xac/0x584 fs/namei.c:4328 __do_sys_mkdirat fs/namei.c:4351 [inline] __se_sys_mkdirat fs/namei.c:4349 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4349 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 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/32: #0: ffff80008ec61ce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 1 lock held by kswapd0/76: 2 locks held by getty/5820: #0: ffff0000d71200a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009a48b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 4 locks held by kworker/u9:2/6137: #0: ffff0000e68bd948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff80009eab7ba0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff0000c784cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x194/0x34c net/bluetooth/hci_sync.c:331 #3: ffff0000c784c078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x218/0xc60 net/bluetooth/hci_sync.c:5569 2 locks held by syz.0.16/7001: 2 locks held by syz.0.16/7002: #0: ffff0000e06d0160 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d0160 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000c8b172d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.1.17/7019: 2 locks held by syz.1.17/7020: #0: ffff0000e06d0680 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d0680 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000d5b444d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.2.18/7037: 2 locks held by syz.2.18/7038: #0: ffff0000e06d0ba0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d0ba0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000d1067cd8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.3.19/7055: 2 locks held by syz.3.19/7056: #0: ffff0000e06d10c0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d10c0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000c71100d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.4.20/7084: 2 locks held by syz.4.20/7085: #0: ffff0000e06d15e0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d15e0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000c60936d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.5.21/7112: 2 locks held by syz.5.21/7113: #0: ffff0000e06d1b00 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000e06d1b00 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000d8d7e6d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.6.22/7145: 2 locks held by syz.6.22/7146: #0: ffff000147694160 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff000147694160 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0001203976d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.7.23/7174: 2 locks held by syz.7.23/7175: #0: ffff000147694680 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff000147694680 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff0000347d4ad8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 2 locks held by syz.8.24/7203: 2 locks held by syz.8.24/7204: #0: ffff000147694ba0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff000147694ba0 (&type->i_mutex_dir_key#8){.+.+}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 #1: ffff000034a470d8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x11c/0x228 fs/bfs/dir.c:136 =============================================