INFO: task syz.0.27:6170 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.27 state:D stack:0 pid:6170 ppid:6097 flags:0x00000001 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 d_wait_lookup+0x154/0x234 fs/dcache.c:2634 d_alloc_parallel+0x9b0/0x113c fs/dcache.c:2716 __lookup_slow+0x114/0x38c fs/namei.c:1683 lookup_slow+0x5c/0x80 fs/namei.c:1715 walk_component fs/namei.c:2006 [inline] link_path_walk+0x794/0xcc0 fs/namei.c:2333 path_lookupat+0x90/0x3d0 fs/namei.c:2486 filename_lookup+0x1c4/0x480 fs/namei.c:2516 user_path_at_empty+0x5c/0x84 fs/namei.c:2913 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3418 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x464/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153f7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000153f8450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000153f72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4080: #0: ffff0000d6da2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001cfe62f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 1 lock held by syz.9.26/5951: 1 lock held by syz.0.27/6167: 1 lock held by syz.0.27/6170: #0: ffff0000e1fc1160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e1fc1160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.1.28/6537: 1 lock held by syz.1.28/6541: #0: ffff000131b246d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff000131b246d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.2.29/7013: 1 lock held by syz.2.29/7016: #0: ffff0000e1fc16a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e1fc16a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.3.30/7322: 1 lock held by syz.3.30/7326: #0: ffff0000e1fc1bf0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e1fc1bf0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 2 locks held by syz.4.31/7767: 1 lock held by syz.4.31/7769: #0: ffff000131b26138 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff000131b26138 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by dhcpcd/7784: #0: ffff0000e08f7410 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000e08f7410 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff0000e08f7410 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: sock_close+0x7c/0x1f8 net/socket.c:1399 1 lock held by syz.5.32/8106: 1 lock held by syz.5.32/8109: #0: ffff000131b26680 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff000131b26680 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.6.33/8521: 1 lock held by syz.6.33/8523: #0: ffff0000e1fc2138 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e1fc2138 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.7.34/8791: 1 lock held by syz.7.34/8793: #0: ffff000131b26bc8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff000131b26bc8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by dhcpcd/8891: #0: ffff00017b610130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1805 [inline] #0: ffff00017b610130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x48/0xb1c net/packet/af_packet.c:3249 =============================================