INFO: task syz-executor.1:16459 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid:16459 ppid: 3061 flags:0x00000009 Call trace: __switch_to+0x180/0x28c arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 request_wait_answer+0x1c0/0x3a8 fs/fuse/dev.c:407 __fuse_request_send+0x1f8/0x264 fs/fuse/dev.c:426 fuse_simple_request+0x354/0x40c fs/fuse/dev.c:511 fuse_lookup_name+0x104/0x324 fs/fuse/dir.c:392 fuse_lookup+0x90/0x274 fs/fuse/dir.c:433 __lookup_slow+0x14c/0x204 fs/namei.c:1685 lookup_slow+0x44/0x68 fs/namei.c:1702 walk_component+0x178/0x1b0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0xc4/0x208 fs/namei.c:2474 filename_lookup+0xf8/0x264 fs/namei.c:2503 kern_path+0x48/0xfc fs/namei.c:2593 unix_find_bsd+0x4c/0x1ec net/unix/af_unix.c:1025 unix_find_other+0x54/0x88 net/unix/af_unix.c:1086 unix_dgram_sendmsg+0x530/0xb34 net/unix/af_unix.c:1937 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x308/0x450 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmmsg+0x228/0x594 net/socket.c:2622 __do_sys_sendmmsg net/socket.c:2651 [inline] __se_sys_sendmmsg net/socket.c:2648 [inline] __arm64_sys_sendmmsg+0x30/0x44 net/socket.c:2648 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 INFO: task syz-executor.1:16474 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid:16474 ppid: 3061 flags:0x00000001 Call trace: __switch_to+0x180/0x28c arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0x258/0x468 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x88/0xcc kernel/locking/rwsem.c:1553 inode_lock include/linux/fs.h:756 [inline] lock_mount+0x2c/0x14c fs/namespace.c:2292 do_new_mount_fc fs/namespace.c:2983 [inline] do_new_mount+0x2d4/0x4e4 fs/namespace.c:3042 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/10: #0: ffff80000d4634e8 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/11: #0: ffff80000d463b38 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/26: #0: ffff80000d4633c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 4 locks held by kworker/u4:3/698: #0: ffff0000c0190938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff80001357bd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff80000d818a18 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x68/0x648 net/core/net_namespace.c:557 #3: ffff80000d464840 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x3a8 kernel/rcu/tree.c:3788 2 locks held by getty/2714: #0: ffff0000c78c6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f63e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:23/20407: 2 locks held by syz-executor.1/16459: #0: ffff0000fed0c610 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline] #0: ffff0000fed0c610 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: lookup_slow+0x34/0x68 fs/namei.c:1701 #1: ffff0000fed0ca78 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 1 lock held by syz-executor.1/16474: #0: ffff0000fed0c610 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000fed0c610 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: lock_mount+0x2c/0x14c fs/namespace.c:2292 =============================================