INFO: task syz-executor.0:19107 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid:19107 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+0x414/0x570 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 request_wait_answer+0x1c0/0x388 fs/fuse/dev.c:407 __fuse_request_send+0x1f8/0x254 fs/fuse/dev.c:426 fuse_simple_request+0x354/0x3fc fs/fuse/dev.c:511 fuse_lookup_name+0x104/0x324 fs/fuse/dir.c:392 fuse_lookup+0x90/0x264 fs/fuse/dir.c:433 __lookup_hash+0xa0/0x164 fs/namei.c:1601 filename_create+0x108/0x218 fs/namei.c:3785 do_mkdirat+0x54/0x22c fs/namei.c:4028 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __arm64_sys_mkdirat+0x40/0x54 fs/namei.c:4051 __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+0x48/0x154 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: 2 locks held by kworker/u4:0/8: 1 lock held by rcu_tasks_kthre/10: #0: ffff80000d4a3568 (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: ffff80000d4a3bb8 (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: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2718: #0: ffff0000c793b898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c drivers/tty/n_tty.c:2177 1 lock held by syz-executor.2/3067: #0: ffff80000d4a49f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffff80000d4a49f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x1e0/0x47c kernel/rcu/tree_exp.h:940 2 locks held by kworker/0:6/3121: #0: ffff0000c0010f38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff8000132cbd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 3 locks held by kworker/1:14/3266: #0: ffff0000c0010738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff80001349bd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff0000fa5b1240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x98/0x164 drivers/net/netdevsim/fib.c:1489 4 locks held by kworker/u4:6/3561: 3 locks held by syz-executor.0/19107: #0: ffff0000fcc8b460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:393 #1: ffff0000f9d65f10 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff0000f9d65f10 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0xf8/0x218 fs/namei.c:3784 #2: ffff0000f9d66378 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 3 locks held by syz-executor.0/19198: #0: ffff0000fc49c460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:393 #1: ffff0000f9c8d290 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff0000f9c8d290 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0xf8/0x218 fs/namei.c:3784 #2: ffff0000f9c8d6f8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0x50/0x70 fs/fuse/inode.c:468 1 lock held by syz-executor.0/19199: #0: ffff0000f9c8d290 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000f9c8d290 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: lock_mount+0x2c/0x14c fs/namespace.c:2292 1 lock held by udevd/19221: #0: ffff0000c58e08d0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff0000c58e08d0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x5c/0x314 mm/readahead.c:220 2 locks held by udevd/19222: 2 locks held by udevd/19476: 1 lock held by dhcpcd/19515: #0: ffff0000caa74710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000caa74710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:649 [inline] #0: ffff0000caa74710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x40/0xf0 net/socket.c:1365 1 lock held by dhcpcd/19516: #0: ffff0000caa74cd0 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000caa74cd0 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:649 [inline] #0: ffff0000caa74cd0 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x40/0xf0 net/socket.c:1365 1 lock held by syz-executor.4/19522: #0: ffff80000d4a49f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffff80000d4a49f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x1e0/0x47c kernel/rcu/tree_exp.h:940 1 lock held by udevd/19537: #0: ffff0001fefcfc58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:544 [inline] #0: ffff0001fefcfc58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1355 [inline] #0: ffff0001fefcfc58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1653 [inline] #0: ffff0001fefcfc58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0xa4/0x570 kernel/sched/core.c:6411 =============================================