INFO: task syz-executor.4:32254 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid:32254 ppid: 3184 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 INFO: task syz-executor.4:32261 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid:32261 ppid: 3184 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 __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 user_path_at_empty+0x5c/0x114 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] __do_sys_name_to_handle_at fs/fhandle.c:107 [inline] __se_sys_name_to_handle_at fs/fhandle.c:93 [inline] __arm64_sys_name_to_handle_at+0x88/0x460 fs/fhandle.c:93 __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 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/10: #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/11: #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/26: #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: ffff0000c79b0898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f60e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:20/23712: 4 locks held by syz-executor.4/32254: #0: ffff0000f00090e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x12c/0x154 fs/file.c:1036 #1: ffff000105cd9410 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: iterate_dir+0x9c/0x28c fs/readdir.c:55 #2: ffff0000c03606a8 (&ff->readdir.lock){+.+.}-{3:3}, at: fuse_readdir+0x4c/0xd4 fs/fuse/readdir.c:577 #3: ffff000105cd9878 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 2 locks held by syz-executor.4/32261: #0: ffff000105cd9410 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline] #0: ffff000105cd9410 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x34/0x68 fs/namei.c:1701 #1: ffff000105cd9878 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 4 locks held by syz-executor.3/8321: 2 locks held by syz-executor.3/8333: #0: ffff0000c7322460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x28/0xd8 fs/namespace.c:437 #1: ffff000105c12a40 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff000105c12a40 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: chown_common+0x19c/0x380 fs/open.c:727 2 locks held by syz-executor.3/8350: #0: ffff0000c7322460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x28/0xd8 fs/namespace.c:437 #1: ffff000105c12a40 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff000105c12a40 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: __ext4_ioctl fs/ext4/ioctl.c:1387 [inline] #1: ffff000105c12a40 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_ioctl+0xec8/0x236c fs/ext4/ioctl.c:1606 =============================================