INFO: task syz-executor.0:6511 blocked for more than 143 seconds. Not tainted 6.1.90-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:6511 ppid:4726 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 rwsem_down_write_slowpath+0xc80/0x156c kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write_nested+0x90/0x94 kernel/locking/rwsem.c:1690 inode_lock_nested include/linux/fs.h:793 [inline] filename_create+0x204/0x468 fs/namei.c:3878 do_mkdirat+0xac/0x510 fs/namei.c:4123 __do_sys_mkdirat fs/namei.c:4148 [inline] __se_sys_mkdirat fs/namei.c:4146 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4146 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 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+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015a14e70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffff800015a15670 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffff800015a14ca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/3982: #0: ffff0000d639d098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001bcd02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188 2 locks held by kworker/1:11/4949: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001deb7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 3 locks held by kworker/1:14/5437: #0: ffff0000ccfeb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001e077c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by syz-executor.0/6504: 2 locks held by syz-executor.0/6511: #0: ffff0000d1722460 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000f6540188 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff0000f6540188 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3878 2 locks held by syz-executor.1/6721: 2 locks held by syz-executor.1/6727: #0: ffff0000e034c460 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000f65406d0 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff0000f65406d0 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3878 5 locks held by kworker/u4:11/6787: #0: ffff0000c0845138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001e8b7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff800017e14fd0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf4/0x994 net/core/net_namespace.c:563 #3: ffff000126ff53e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x11c/0x2dc drivers/net/wireguard/device.c:249 #4: ffff800015a1a278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #4: ffff800015a1a278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e0/0x77c kernel/rcu/tree_exp.h:962 2 locks held by kworker/u4:15/6791: 1 lock held by syz-executor.1/6926: #0: ffff800015a1a278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffff800015a1a278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x30c/0x77c kernel/rcu/tree_exp.h:962 2 locks held by syz-executor.4/6952: 2 locks held by syz-executor.4/6959: #0: ffff0000f6e80460 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000f716c188 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff0000f716c188 (&type->i_mutex_dir_key#24/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3878 1 lock held by syz-executor.2/9059: #0: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e8/0xd94 net/core/rtnetlink.c:6118 2 locks held by syz-executor.4/9251: #0: ffff800017e14fd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d4/0x590 net/core/net_namespace.c:474 #1: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by rm/9260: 1 lock held by syz-executor.0/9262: #0: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017e20e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e8/0xd94 net/core/rtnetlink.c:6118 3 locks held by dhcpcd-run-hook/9263: =============================================