INFO: task syz-executor:4238 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:4238  tgid:4238  ppid:1      flags:0x00000006
Call Trace:
[<ffffffff85fe3a64>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a64>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6654>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6654>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85ff9402>] schedule_timeout+0x1e2/0x296 kernel/time/timer.c:2591
[<ffffffff85fe8032>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff85fe8032>] __wait_for_common+0x1ca/0x4b6 kernel/sched/completion.c:116
[<ffffffff85fe8338>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff85fe8338>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff802d83a6>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:4629
[<ffffffff84d323e6>] netdev_run_todo+0x294/0x105e net/core/dev.c:10778
[<ffffffff84d5e84e>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:152
[<ffffffff833173f8>] nsim_destroy+0x178/0x5fe drivers/net/netdevsim/netdev.c:785
[<ffffffff83318636>] __nsim_dev_port_del+0x168/0x236 drivers/net/netdevsim/dev.c:1425
[<ffffffff8331c68c>] nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline]
[<ffffffff8331c68c>] nsim_dev_reload_destroy+0x11c/0x452 drivers/net/netdevsim/dev.c:1658
[<ffffffff8331e132>] nsim_drv_remove+0x54/0x1b6 drivers/net/netdevsim/dev.c:1673
[<ffffffff8332b9de>] nsim_bus_remove+0x1a/0x24 drivers/net/netdevsim/bus.c:398
[<ffffffff8280d1a6>] device_remove+0xba/0x15c drivers/base/dd.c:567
[<ffffffff82810752>] __device_release_driver drivers/base/dd.c:1273 [inline]
[<ffffffff82810752>] device_release_driver_internal+0x3f0/0x572 drivers/base/dd.c:1296
[<ffffffff828108f2>] device_release_driver+0x1e/0x28 drivers/base/dd.c:1319
[<ffffffff8280b71a>] bus_remove_device+0x1f4/0x3d2 drivers/base/bus.c:576
[<ffffffff827fc63e>] device_del+0x324/0x898 drivers/base/core.c:3864
[<ffffffff827fcbda>] device_unregister+0x28/0xe0 drivers/base/core.c:3905
[<ffffffff8332bd44>] nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
[<ffffffff8332bd44>] del_device_store+0x338/0x48c drivers/net/netdevsim/bus.c:226
[<ffffffff82807fc6>] bus_attr_store+0x6a/0x9e drivers/base/bus.c:172
[<ffffffff80c863e8>] sysfs_kf_write+0xe0/0x140 fs/sysfs/file.c:136
[<ffffffff80c8351a>] kernfs_fop_write_iter+0x2cc/0x460 fs/kernfs/file.c:334
[<ffffffff80a27418>] new_sync_write fs/read_write.c:590 [inline]
[<ffffffff80a27418>] vfs_write+0x4d4/0x9b4 fs/read_write.c:683
[<ffffffff80a27d1a>] ksys_write+0x128/0x266 fs/read_write.c:736
[<ffffffff80a27ec6>] __do_sys_write fs/read_write.c:748 [inline]
[<ffffffff80a27ec6>] __se_sys_write fs/read_write.c:745 [inline]
[<ffffffff80a27ec6>] __riscv_sys_write+0x6e/0x94 fs/read_write.c:745
[<ffffffff8000f2d4>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff85fd9c3a>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff85ffcab6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
4 locks held by kworker/u8:1/12:
 #0: ff60000011e81948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000000d7c90 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
 #2: ffffffff89397670 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xda/0x984 net/core/net_namespace.c:580
 #3: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #3: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x138/0x29a net/devlink/core.c:506
1 lock held by khungtaskd/36:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by getty/3147:
 #0: ff6000001c9060a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
2 locks held by sshd/3172:
1 lock held by syz-executor/3174:
2 locks held by kworker/1:1/3176:
2 locks held by kworker/1:3/3177:
2 locks held by kworker/1:4/3867:
7 locks held by syz-executor/4238:
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000002e609888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001aec9e18 (kn->active#4){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x258/0x460 fs/kernfs/file.c:326
 #3: ffffffff88c129e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xf0/0x48c drivers/net/netdevsim/bus.c:216
 #4: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff600000189040e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff60000018900250 (&devlink->lock_key#2){+.+.}-{3:3}, at: devl_lock+0x22/0x2c net/devlink/core.c:276
 #6: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:5/4426:
3 locks held by kworker/1:7/4554:
2 locks held by kworker/1:8/4614:
4 locks held by syz-executor/4623:
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d38c420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000003a876088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001aec9e18 (kn->active#4){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x258/0x460 fs/kernfs/file.c:326
 #3: ffffffff88c129e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xf0/0x48c drivers/net/netdevsim/bus.c:216

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3bc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd796a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd796a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd79fa>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3fa9e>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd56>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019964>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c2c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c2c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c2c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e04>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbce>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3176 Comm: kworker/1:1 Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
epc : preempt_count include/asm-generic/preempt.h:11 [inline]
epc : should_resched include/asm-generic/preempt.h:77 [inline]
epc : __local_bh_enable_ip+0x392/0x5ee kernel/softirq.c:389
 ra : __local_bh_enable_ip+0x38e/0x5ee kernel/softirq.c:387
epc : ffffffff800e2674 ra : ffffffff800e2670 sp : ff200000000173c0
 gp : ffffffff897bea80 tp : ff60000017f93480 t0 : ff60000017f93fa0
 t1 : 0000000000000000 t2 : 0000000000000006 s0 : ff20000000017410
 s1 : 0000000000000102 a0 : 0000000000000001 a1 : ffffffff8643e620
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 00000000000cc610 a6 : ff60000017f93fe8 a7 : 1fec000002ff27fd
 s2 : ff60000017f93480 s3 : ffffffff855d3cf6 s4 : 0000000000000001
 s5 : ffffffff90b60b00 s6 : 1fec000002ff2691 s7 : ffffffff897f7f20
 s8 : ff20000000017640 s9 : dfffffff00000000 s10: ff6000002e878100
 s11: ff200000000175e0 t3 : 1fec0000029f6f02 t4 : ffffffff87217028
 t5 : ff6000001792e138 t6 : 1fec000002ff2807
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff800e2674>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff800e2674>] __local_bh_enable_ip+0x392/0x5ee kernel/softirq.c:387
[<ffffffff855d3d1c>] local_bh_enable include/linux/bottom_half.h:33 [inline]
[<ffffffff855d3d1c>] ipt_do_table+0xe9a/0x1d54 net/ipv4/netfilter/ip_tables.c:357
[<ffffffff85112720>] nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
[<ffffffff85112720>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:626
[<ffffffff8533037a>] nf_hook include/linux/netfilter.h:269 [inline]
[<ffffffff8533037a>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff8533037a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8532ee22>] dst_input include/net/dst.h:460 [inline]
[<ffffffff8532ee22>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:449
[<ffffffff853306ce>] NF_HOOK include/linux/netfilter.h:314 [inline]
[<ffffffff853306ce>] NF_HOOK include/linux/netfilter.h:308 [inline]
[<ffffffff853306ce>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:569
[<ffffffff84d21a44>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5662
[<ffffffff84d21cc4>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:5775
[<ffffffff84d22d48>] process_backlog+0x4fc/0x1cbc net/core/dev.c:6107
[<ffffffff84d275fa>] __napi_poll.constprop.0+0xaa/0x4b8 net/core/dev.c:6771
[<ffffffff84d2841a>] napi_poll net/core/dev.c:6840 [inline]
[<ffffffff84d2841a>] net_rx_action+0xa12/0xf10 net/core/dev.c:6962
[<ffffffff800e0faa>] handle_softirqs+0x4a6/0x10de kernel/softirq.c:554
[<ffffffff800e1eae>] __do_softirq kernel/softirq.c:588 [inline]
[<ffffffff800e1eae>] invoke_softirq kernel/softirq.c:428 [inline]
[<ffffffff800e1eae>] __irq_exit_rcu+0x188/0x372 kernel/softirq.c:637
[<ffffffff800e2adc>] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:649
[<ffffffff85fd94e4>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:378
[<ffffffff85ffcc0a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355