INFO: task syz-executor.4:22794 blocked for more than 143 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:22794 ppid:6014 flags:0x00000001 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6757 rwsem_down_write_slowpath+0xcb8/0x146c kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0xc0/0xcc kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x5f0/0x2810 fs/namei.c:3712 do_filp_open+0x1bc/0x3cc fs/namei.c:3742 do_sys_openat2+0x128/0x3d8 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1375 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015eb7c90 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015eb8490 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff800015eb7ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 4 locks held by kworker/u4:6/1842: #0: ffff0000c0841138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff800022bd7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 #2: ffff80001838b190 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf4/0x8d0 net/core/net_namespace.c:575 #3: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #3: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:989 2 locks held by getty/5625: #0: ffff0000d8643098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001a9e02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-fuzzer/6348: 1 lock held by syz-executor.0/6012: 2 locks held by kworker/1:7/6057: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001eb37c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 2 locks held by kworker/0:9/6433: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001f497c20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 2 locks held by kworker/u4:9/6841: 2 locks held by kworker/0:14/7133: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff800022ae7c20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 7 locks held by syz-executor.4/22775: 2 locks held by syz-executor.4/22794: #0: ffff00012d6a0460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff0001334562c0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0001334562c0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline] #1: ffff0001334562c0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: path_openat+0x5f0/0x2810 fs/namei.c:3712 2 locks held by kworker/0:0/22922: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff800025e07c20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 4 locks held by syz-executor.1/23083: 2 locks held by syz-executor.1/23099: #0: ffff00014518a460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff00012bd8dc58 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff00012bd8dc58 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline] #1: ffff00012bd8dc58 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: path_openat+0x5f0/0x2810 fs/namei.c:3712 1 lock held by udevd/23133: 2 locks held by syz-executor.2/24977: #0: ffff0000ddf4b210 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000ddf4b210 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:650 [inline] #0: ffff0000ddf4b210 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x80/0x1fc net/socket.c:1393 #1: ffff0001276c6130 (sk_lock-AF_CAIF){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #1: ffff0001276c6130 (sk_lock-AF_CAIF){+.+.}-{0:0}, at: caif_release+0x108/0x35c net/caif/caif_socket.c:913 1 lock held by syz-executor.1/24982: #0: ffff80001838b190 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x3a4/0x644 net/core/net_namespace.c:486 3 locks held by syz-executor.1/24988: 2 locks held by syz-executor.5/25001: 1 lock held by syz-executor.0/25003: #0: ffff800018397088 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffff800018397088 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x700/0xdb8 net/core/rtnetlink.c:6171 2 locks held by syz-executor.3/25005: =============================================