INFO: task syz-executor.3:10969 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack: 0 pid:10969 ppid: 3200 flags:0x00000009 Call trace: __switch_to+0x180/0x298 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_readdir_uncached+0x1ac/0x680 fs/fuse/readdir.c:351 fuse_readdir+0xa8/0xd4 fs/fuse/readdir.c:583 iterate_dir+0x114/0x28c __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x80/0x204 fs/readdir.c:354 __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:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.3:10982 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack: 0 pid:10982 ppid: 3200 flags:0x00000001 Call trace: __switch_to+0x180/0x298 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 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629 __mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 fuse_lookup+0x74/0x274 fs/fuse/dir.c:432 fuse_atomic_open+0xa4/0x708 fs/fuse/dir.c:662 atomic_open fs/namei.c:3276 [inline] lookup_open fs/namei.c:3384 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x67c/0x11c4 fs/namei.c:3688 do_filp_open+0xdc/0x1b8 fs/namei.c:3718 do_sys_openat2+0xb8/0x22c fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_openat fs/open.c:1345 [inline] __se_sys_openat fs/open.c:1340 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1340 __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:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffff80000d433568 (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/12: #0: ffff80000d433bb8 (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/27: #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2719: #0: ffff0000c7b3b898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:12/29756: 5 locks held by kworker/1:2/21842: #0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff8000162cbd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff0000c61eb990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff0000c61eb990 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681 #3: ffff000111b4e990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff000111b4e990 (&dev->mutex){....}-{3:3}, at: __device_attach+0x44/0x26c drivers/base/dd.c:983 #4: ffff000111b48918 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff000111b48918 (&dev->mutex){....}-{3:3}, at: __device_attach+0x44/0x26c drivers/base/dd.c:983 4 locks held by syz-executor.3/10969: #0: ffff0000c9c56ae8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x12c/0x154 fs/file.c:1036 #1: ffff00011c85b990 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: iterate_dir+0x9c/0x28c fs/readdir.c:55 #2: ffff000103caaca8 (&ff->readdir.lock){+.+.}-{3:3}, at: fuse_readdir+0x4c/0xd4 fs/fuse/readdir.c:577 #3: ffff00011c85bdf8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 3 locks held by syz-executor.3/10982: #0: ffff0001121d7460 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:393 #1: ffff00011c85b990 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline] #1: ffff00011c85b990 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: open_last_lookups fs/namei.c:3480 [inline] #1: ffff00011c85b990 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: path_openat+0x2e4/0x11c4 fs/namei.c:3688 #2: ffff00011c85bdf8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 =============================================