INFO: task syz-executor:6178 blocked for more than 143 seconds. Not tainted 5.15.182-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack: 0 pid: 6178 ppid: 1 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xe00/0x1c0c kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6518 __mutex_lock_common+0xa9c/0x1edc kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 bus_attr_store+0x80/0xa4 drivers/base/bus.c:124 sysfs_kf_write+0x1f8/0x278 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x320/0x478 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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 khungtaskd/27: #0: ffff8000143211e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 2 locks held by getty/3802: #0: ffff0000d3df0098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001b7802e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 2 locks held by kworker/u4:6/4119: 6 locks held by kworker/u4:13/4263: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f867c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff80001626c490 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa98 net/core/net_namespace.c:589 #3: ffff80001629daa8 (devlink_mutex){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x98/0x33c net/core/devlink.c:11534 #4: ffff0000ca3b2670 (&nsim_bus_dev->nsim_bus_reload_lock){+.+.}-{3:3}, at: nsim_dev_reload_down+0x54/0x154 drivers/net/netdevsim/dev.c:870 #5: ffff0000ca3b3250 (&devlink->lock){+.+.}-{3:3}, at: devlink_traps_unregister+0x40/0x228 net/core/devlink.c:11030 4 locks held by syz-executor/6178: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000d564e888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 6 locks held by syz-executor/6184: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000d2917488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 #4: ffff0000c8056178 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff0000c8056178 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1044 [inline] #4: ffff0000c8056178 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x63c drivers/base/dd.c:1259 #5: ffff80001629daa8 (devlink_mutex){+.+.}-{3:3}, at: devlink_unregister+0xa4/0x208 net/core/devlink.c:8984 4 locks held by syz-executor/6311: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000d23cf088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6336: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000e9961488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6390: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000e9bb6088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6601: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000e7634488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6652: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0000e985ec88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6771: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff000111781088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6777: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff000110ea3088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6789: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff000109f97c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6813: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff00011bb3a088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 4 locks held by syz-executor/6825: #0: ffff0000d487e460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x228/0xa2c fs/read_write.c:590 #1: ffff0001074e8c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c0/0x478 fs/kernfs/file.c:287 #2: ffff0000cedb50f0 (kn->active#235){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1dc/0x478 fs/kernfs/file.c:288 #3: ffff80001584ce68 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd4/0x33c drivers/net/netdevsim/bus.c:344 1 lock held by dhcpcd/6965: #0: ffff0000ec192120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline] #0: ffff0000ec192120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb68 net/packet/af_packet.c:3213 1 lock held by dhcpcd/6967: #0: ffff0000c8e8a120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline] #0: ffff0000c8e8a120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb68 net/packet/af_packet.c:3213 1 lock held by dhcpcd/6968: #0: ffff0000cfb9e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline] #0: ffff0000cfb9e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb68 net/packet/af_packet.c:3213 =============================================