INFO: task syz-executor:6584 blocked for more than 143 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6584 tgid:6584 ppid:1 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 del_device_store+0xd4/0x31c drivers/net/netdevsim/bus.c:216 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145 kernfs_fop_write_iter+0x314/0x488 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x62c/0x97c fs/read_write.c:684 ksys_write+0x120/0x210 fs/read_write.c:736 __do_sys_write fs/read_write.c:747 [inline] __se_sys_write fs/read_write.c:744 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:744 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz-executor:6598 blocked for more than 143 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6598 tgid:6598 ppid:1 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 new_device_store+0x128/0x594 drivers/net/netdevsim/bus.c:166 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145 kernfs_fop_write_iter+0x314/0x488 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x62c/0x97c fs/read_write.c:684 ksys_write+0x120/0x210 fs/read_write.c:736 __do_sys_write fs/read_write.c:747 [inline] __se_sys_write fs/read_write.c:744 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:744 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 3 locks held by kworker/0:1/11: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097627bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by khungtaskd/32: #0: ffff80008f4e7d20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA0/46: 2 locks held by kworker/u8:6/2211: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a00e7bc0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 5 locks held by kworker/u8:7/2628: #0: ffff0000c183a148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1cf7bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009245b710 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x138/0x9c0 net/core/net_namespace.c:608 #3: ffff0000d39454e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x114/0x2bc drivers/net/wireguard/device.c:249 #4: ffff80008f4ed700 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x528 kernel/rcu/tree.c:3774 2 locks held by dhcpcd/6158: #0: ffff0000f155e6d0 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: netlink_dump+0xc0/0xbc0 net/netlink/af_netlink.c:2255 #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x8c/0x1d0 net/core/rtnetlink.c:6823 2 locks held by getty/6249: #0: ffff0000d20f90a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5ae2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 4 locks held by syz-executor/6584: #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:680 #1: ffff0000d8cd3088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x488 fs/kernfs/file.c:325 #2: ffff0000cc04b4b8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1d0/0x488 fs/kernfs/file.c:326 #3: ffff80009151f168 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd4/0x31c drivers/net/netdevsim/bus.c:216 6 locks held by syz-executor/6587: #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:680 #1: ffff0000d6244088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x488 fs/kernfs/file.c:325 #2: ffff0000cc04b4b8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1d0/0x488 fs/kernfs/file.c:326 #3: ffff80009151f168 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd4/0x31c drivers/net/netdevsim/bus.c:216 #4: ffff0000d3cc10e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline] #4: ffff0000d3cc10e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1094 [inline] #4: ffff0000d3cc10e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0x9c/0x658 drivers/base/dd.c:1292 #5: ffff0000d3cc2250 (&devlink->lock_key){+.+.}-{4:4}, at: devl_lock+0x24/0x34 net/devlink/core.c:276 4 locks held by syz-executor/6598: #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:680 #1: ffff0000d470f088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x488 fs/kernfs/file.c:325 #2: ffff0000cc04b3c8 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1d0/0x488 fs/kernfs/file.c:326 #3: ffff80009151f168 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x128/0x594 drivers/net/netdevsim/bus.c:166 4 locks held by syz-executor/6661: #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff0000d7714420 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:680 #1: ffff0000ec406888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x488 fs/kernfs/file.c:325 #2: ffff0000cc04b4b8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1d0/0x488 fs/kernfs/file.c:326 #3: ffff80009151f168 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd4/0x31c drivers/net/netdevsim/bus.c:216 1 lock held by syz-executor/6721: #0: ffff80008f4ed700 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x528 kernel/rcu/tree.c:3774 1 lock held by syz-executor/6728: #0: ffff80008f4ed700 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x528 kernel/rcu/tree.c:3774 1 lock held by syz-executor/6799: #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4064 2 locks held by syz-executor/6807: #0: ffff800091304f40 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4064 3 locks held by syz-executor/6810: 1 lock held by syz-executor/6812: #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4064 2 locks held by syz-executor/6820: #0: ffff800091304f40 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4064 =============================================