INFO: task syz-executor:8118 blocked for more than 143 seconds. Not tainted 5.15.176-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack: 0 pid: 8118 ppid: 1 flags:0x00000001 Call trace: __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 bus_attr_store+0x80/0xa4 drivers/base/bus.c:124 sysfs_kf_write+0x200/0x280 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x334/0x48c fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2174 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x884/0xb44 fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by init/1: 1 lock held by khungtaskd/27: #0: ffff800014d32360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 3 locks held by kworker/u4:1/136: 1 lock held by klogd/3631: 1 lock held by dhcpcd/3693: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: __netlink_dump_start+0x108/0x6d4 net/netlink/af_netlink.c:2334 2 locks held by getty/3787: #0: ffff0000d2d89098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001d4fe2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158 1 lock held by sshd/4010: 5 locks held by kworker/u4:7/4109: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff800020347c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff800016c98950 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf4/0x9bc net/core/net_namespace.c:561 #3: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 #4: ffff0000d54e53e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_netns_pre_exit+0xbc/0x1d0 drivers/net/wireguard/device.c:409 3 locks held by kworker/u4:12/4284: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff800022537c00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/0:14/6961: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff8000213c7c00 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff0000d0585400 (&nsim_dev->port_list_lock#2){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x60/0x90c drivers/net/netdevsim/dev.c:757 7 locks held by syz-executor/7793: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000e57ac888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 #4: ffff0000d0584178 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff0000d0584178 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1044 [inline] #4: ffff0000d0584178 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x6ac drivers/base/dd.c:1259 #5: ffff0000d0585400 (&nsim_dev->port_list_lock#2){+.+.}-{3:3}, at: nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1359 [inline] #5: ffff0000d0585400 (&nsim_dev->port_list_lock#2){+.+.}-{3:3}, at: nsim_dev_reload_destroy+0xfc/0x214 drivers/net/netdevsim/dev.c:1561 #6: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 4 locks held by syz-executor/8118: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000e89b6c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8151: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000e6709c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8158: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000d3ab3888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8197: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000e76fac88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8278: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000c2533c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8324: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000e9bc0888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/8462: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000f93a7888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 1 lock held by syz-executor/8521: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 4 locks held by syz-executor/8533: #0: ffff0000d4648460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xb44 fs/read_write.c:590 #1: ffff0000c8c96c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:287 #2: ffff0000ce7aa578 (kn->active#230){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:288 #3: ffff800016271a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x3bc drivers/net/netdevsim/bus.c:344 1 lock held by syz-executor/8561: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by syz-executor/8655: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac net/core/rtnetlink.c:5644 2 locks held by syz-executor/8784: #0: ffff800016c98950 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:472 #1: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 6 locks held by syz-executor/8791: #0: ffff800016c98950 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:472 #1: ffff800016821790 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x188/0x264 drivers/infiniband/core/device.c:1178 #2: ffff800016821950 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x1d8/0x264 drivers/infiniband/core/device.c:1183 #3: ffff0000c2a80ff8 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0x11c/0x584 drivers/infiniband/core/device.c:942 #4: ffff0000c2a81220 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x58/0x1b0 drivers/infiniband/sw/rxe/rxe_verbs.c:40 #5: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by syz-executor/8839: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac net/core/rtnetlink.c:5644 4 locks held by syz-executor/8845: #0: ffff800016c98950 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:472 #1: ffff800016821790 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x188/0x264 drivers/infiniband/core/device.c:1178 #2: ffff800016821950 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x1d8/0x264 drivers/infiniband/core/device.c:1183 #3: ffff0000c2a80ff8 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0x11c/0x584 drivers/infiniband/core/device.c:942 1 lock held by syz-executor/8848: #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff800016ca4168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac net/core/rtnetlink.c:5644 =============================================