INFO: task syz-executor:17072 blocked for more than 430 seconds. Not tainted 6.14.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:17072 tgid:17072 ppid:17071 task_flags:0x480140 flags:0x0040000c Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5378 [inline] __schedule+0xb7c/0x3008 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6857 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6914 __mutex_lock_common kernel/locking/mutex.c:662 [inline] __mutex_lock+0x5d8/0x978 kernel/locking/mutex.c:730 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:782 rcu_barrier+0x4c/0x590 kernel/rcu/tree.c:3741 netdev_run_todo+0x24c/0xd48 net/core/dev.c:11218 rtnl_unlock+0x10/0x1c net/core/rtnetlink.c:151 nsim_destroy+0x12c/0x530 drivers/net/netdevsim/netdev.c:1028 __nsim_dev_port_del+0x128/0x1d8 drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0xd0/0x3a0 drivers/net/netdevsim/dev.c:1661 nsim_drv_remove+0x50/0x19c drivers/net/netdevsim/dev.c:1676 nsim_bus_remove+0x10/0x1c drivers/net/netdevsim/bus.c:398 device_remove+0xb0/0x14c drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x310/0x47c drivers/base/dd.c:1296 device_release_driver+0x18/0x24 drivers/base/dd.c:1319 bus_remove_device+0x1a4/0x348 drivers/base/bus.c:579 device_del+0x2d0/0x7b4 drivers/base/core.c:3854 device_unregister+0x20/0xbc drivers/base/core.c:3895 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline] del_device_store+0x28c/0x3b8 drivers/net/netdevsim/bus.c:226 bus_attr_store+0x60/0x9c drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x12c fs/sysfs/file.c:139 kernfs_fop_write_iter+0x238/0x3c8 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x4b0/0xad4 fs/read_write.c:679 ksys_write+0xec/0x1d8 fs/read_write.c:731 __do_sys_write fs/read_write.c:742 [inline] __se_sys_write fs/read_write.c:739 [inline] __arm64_sys_write+0x6c/0x9c fs/read_write.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:157 el0_svc_compat+0x4c/0x17c arch/arm64/kernel/entry-common.c:887 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:897 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605 INFO: task syz-executor:17083 blocked for more than 430 seconds. Not tainted 6.14.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:17083 tgid:17083 ppid:17081 task_flags:0x400140 flags:0x00400000 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5378 [inline] __schedule+0xb7c/0x3008 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6857 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6914 __mutex_lock_common kernel/locking/mutex.c:662 [inline] __mutex_lock+0x5d8/0x978 kernel/locking/mutex.c:730 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:782 del_device_store+0xbc/0x3b8 drivers/net/netdevsim/bus.c:216 bus_attr_store+0x60/0x9c drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x12c fs/sysfs/file.c:139 kernfs_fop_write_iter+0x238/0x3c8 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x4b0/0xad4 fs/read_write.c:679 ksys_write+0xec/0x1d8 fs/read_write.c:731 __do_sys_write fs/read_write.c:742 [inline] __se_sys_write fs/read_write.c:739 [inline] __arm64_sys_write+0x6c/0x9c fs/read_write.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:157 el0_svc_compat+0x4c/0x17c arch/arm64/kernel/entry-common.c:887 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:897 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff8000871298e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x44/0x2d0 kernel/locking/lockdep.c:6740 1 lock held by klogd/3108: 2 locks held by getty/3238: #0: ffff00001669c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d36b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2211 3 locks held by sshd/3291: 2 locks held by kworker/1:4/16380: 1 lock held by syz.4.3405/17070: #0: ffff800087132240 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x590 kernel/rcu/tree.c:3741 7 locks held by syz-executor/17072: #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1785 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1921 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x670/0xad4 fs/read_write.c:675 #1: ffff00001c77d888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ac/0x3c8 fs/kernfs/file.c:325 #2: ffff0000174ce698 (kn->active#35){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1c8/0x3c8 fs/kernfs/file.c:326 #3: ffff800087e25b48 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xbc/0x3b8 drivers/net/netdevsim/bus.c:216 #4: ffff0000188330e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #4: ffff0000188330e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff0000188330e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0x84/0x47c drivers/base/dd.c:1293 #5: ffff000018834250 (&devlink->lock_key#16){+.+.}-{4:4}, at: devl_lock+0x18/0x24 net/devlink/core.c:276 #6: ffff800087132240 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x590 kernel/rcu/tree.c:3741 4 locks held by syz-executor/17083: #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1785 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1921 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline] #0: ffff0000186e4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x670/0xad4 fs/read_write.c:675 #1: ffff00001c7a4c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ac/0x3c8 fs/kernfs/file.c:325 #2: ffff0000174ce698 (kn->active#35){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1c8/0x3c8 fs/kernfs/file.c:326 #3: ffff800087e25b48 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xbc/0x3b8 drivers/net/netdevsim/bus.c:216 6 locks held by kworker/u8:13/17112: #0: ffff00000dd5a148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3211 #1: ffff8000a03f7c80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3211 #2: ffff80008862b030 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xd4/0x93c net/core/net_namespace.c:606 #3: ffff00001da510e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #3: ffff00001da510e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] #3: ffff00001da510e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x108/0x23c net/devlink/core.c:506 #4: ffff00001da54250 (&devlink->lock_key#26){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline] #4: ffff00001da54250 (&devlink->lock_key#26){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] #4: ffff00001da54250 (&devlink->lock_key#26){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x114/0x23c net/devlink/core.c:506 #5: ffff800087132240 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x590 kernel/rcu/tree.c:3741 3 locks held by kworker/1:8/17164: 2 locks held by cmp/17171: =============================================