INFO: task syz.2.91:5000 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.91        state:D stack:0     pid:5000  tgid:5000  ppid:4297   flags:0x00000006
Call Trace:
[<ffffffff85fe3a74>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a74>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6664>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6664>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85ff9412>] schedule_timeout+0x1e2/0x296 kernel/time/timer.c:2591
[<ffffffff85fe8042>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff85fe8042>] __wait_for_common+0x1ca/0x4b6 kernel/sched/completion.c:116
[<ffffffff85fe8348>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff85fe8348>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff802d83b6>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:4629
[<ffffffff84d323f6>] netdev_run_todo+0x294/0x105e net/core/dev.c:10778
[<ffffffff84d5e85e>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:152
[<ffffffff82f49534>] tun_detach drivers/net/tun.c:704 [inline]
[<ffffffff82f49534>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3517
[<ffffffff80a2c758>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce6c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb7c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff85fdac68>] resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
[<ffffffff85fdac68>] exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
[<ffffffff85fdac68>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdac68>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdac68>] syscall_exit_to_user_mode+0x30a/0x31e kernel/entry/common.c:218
[<ffffffff85fd9b26>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
1 lock held by kworker/R-mm_pe/13:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
2 locks held by kworker/1:1/33:
1 lock held by khungtaskd/37:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by kworker/u9:3/65:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000004f7c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
2 locks held by kworker/1:2/903:
2 locks held by getty/3124:
 #0: ff6000001c7f50a0 (&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/3147:
1 lock held by kworker/R-wg-cr/3344:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
1 lock held by kworker/R-wg-cr/3350:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
1 lock held by kworker/R-wg-cr/3356:
2 locks held by kworker/1:0/3735:
2 locks held by kworker/1:3/3785:
2 locks held by kworker/1:4/3841:
2 locks held by kworker/1:5/3842:
3 locks held by kworker/0:5/3843:
2 locks held by kworker/u9:0/4234:
2 locks held by kworker/1:6/4264:
6 locks held by kworker/u8:0/4300:
 #0: ff60000011e81948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff2000000c167c90 (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: ff6000001c07b0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ff6000001c07b0e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #3: ff6000001c07b0e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x138/0x29a net/devlink/core.c:506
 #4: ff60000017cb3250 (&devlink->lock_key#2){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline]
 #4: ff60000017cb3250 (&devlink->lock_key#2){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #4: ff60000017cb3250 (&devlink->lock_key#2){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x144/0x29a net/devlink/core.c:506
 #5: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
1 lock held by kworker/R-wg-cr/4395:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
1 lock held by kworker/R-wg-cr/4398:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline]
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0x73e/0xc72 kernel/workqueue.c:3526
1 lock held by kworker/R-wg-cr/4401:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
2 locks held by kworker/1:7/4436:
2 locks held by kworker/1:8/4519:
2 locks held by kworker/u9:5/4561:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff2000000bbb7c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
1 lock held by kworker/R-wg-cr/4643:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline]
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0x73e/0xc72 kernel/workqueue.c:3526
1 lock held by kworker/R-wg-cr/4646:
2 locks held by kworker/1:9/4662:
2 locks held by kworker/1:10/4673:
2 locks held by kworker/1:11/4797:
3 locks held by kworker/1:12/4870:
2 locks held by kworker/1:13/4962:
2 locks held by kworker/1:14/4990:
1 lock held by syz.2.91/5000:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:15/5029:
2 locks held by kworker/1:16/5041:
1 lock held by kworker/R-wg-cr/5153:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
1 lock held by kworker/R-wg-cr/5156:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
1 lock held by kworker/R-wg-cr/5159:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
2 locks held by kworker/1:17/5298:
3 locks held by kworker/0:3/5490:
1 lock held by kworker/1:18/5512:
2 locks held by kworker/1:19/5584:
2 locks held by kworker/1:20/5600:
1 lock held by syz.3.167/5618:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:21/5638:
1 lock held by modprobe/5669:
4 locks held by modprobe/5671:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd797a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd797a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd7a0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3faae>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd66>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019974>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c3c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c3c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c3c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] 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: 4436 Comm: kworker/1:7 Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
epc : fp_is_valid arch/riscv/kernel/stacktrace.c:26 [inline]
epc : walk_stackframe+0x114/0x452 arch/riscv/kernel/stacktrace.c:60
 ra : fp_is_valid arch/riscv/kernel/stacktrace.c:26 [inline]
 ra : walk_stackframe+0x114/0x452 arch/riscv/kernel/stacktrace.c:60
epc : ffffffff800104a8 ra : ffffffff800104a8 sp : ff20000000016c40
 gp : ffffffff897bea80 tp : ff60000018931a40 t0 : ff20000000016f90
 t1 : ff60000018932600 t2 : 000000000000000e s0 : ff20000000016cc0
 s1 : ff20000000017890 a0 : 0000000000000006 a1 : ff20000000017890
 a2 : 0000000000f00000 a3 : ffffffff800104a8 a4 : 0000000000000000
 a5 : ff60000018931a40 a6 : 0000000000f00000 a7 : 000000000844081c
 s2 : ff20000000017850 s3 : 0000000000000010 s4 : ff20000000017860
 s5 : 0000000000000000 s6 : ffffffff8532ee32 s7 : dfffffff00000000
 s8 : dfffffff00000000 s9 : ffffffff85ffc980 s10: 0000000000007fff
 s11: ff20000000017890 t3 : 1fec0000031264ab t4 : 0000000000000004
 t5 : b7813bd8ef2efd39 t6 : 1fec0000031264c4
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff800104a8>] fp_is_valid arch/riscv/kernel/stacktrace.c:26 [inline]
[<ffffffff800104a8>] walk_stackframe+0x114/0x452 arch/riscv/kernel/stacktrace.c:60
[<ffffffff85fd9d70>] arch_stack_walk+0x1c/0x24 arch/riscv/kernel/stacktrace.c:163
[<ffffffff80329c14>] stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122
[<ffffffff8096f36a>] kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47
[<ffffffff80971c84>] __kasan_record_aux_stack+0x11a/0x166 mm/kasan/generic.c:541
[<ffffffff8097209c>] kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:551
[<ffffffff802e1f72>] __call_rcu_common.constprop.0+0x9a/0x934 kernel/rcu/tree.c:3086
[<ffffffff802e282c>] call_rcu+0xc/0x14 kernel/rcu/tree.c:3190
[<ffffffff84d3d66c>] call_rcu_hurry include/linux/rcupdate.h:115 [inline]
[<ffffffff84d3d66c>] dst_release net/core/dst.c:165 [inline]
[<ffffffff84d3d66c>] dst_release+0x29a/0x364 net/core/dst.c:162
[<ffffffff84ca1d80>] refdst_drop include/net/dst.h:263 [inline]
[<ffffffff84ca1d80>] skb_dst_drop include/net/dst.h:275 [inline]
[<ffffffff84ca1d80>] skb_release_head_state+0x25a/0x2b6 net/core/skbuff.c:1174
[<ffffffff84cb03f2>] skb_release_all net/core/skbuff.c:1188 [inline]
[<ffffffff84cb03f2>] __kfree_skb net/core/skbuff.c:1204 [inline]
[<ffffffff84cb03f2>] consume_skb net/core/skbuff.c:1436 [inline]
[<ffffffff84cb03f2>] consume_skb+0x9e/0xfa net/core/skbuff.c:1430
[<ffffffff852a7176>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
[<ffffffff852a7176>] nft_synproxy_do_eval+0x8b6/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff852a7370>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff851dd7c2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
[<ffffffff851dd7c2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:288
[<ffffffff8523729c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff85112730>] nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
[<ffffffff85112730>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:626
[<ffffffff8533038a>] nf_hook include/linux/netfilter.h:269 [inline]
[<ffffffff8533038a>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff8533038a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8532ee32>] dst_input include/net/dst.h:460 [inline]
[<ffffffff8532ee32>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:449
[<ffffffff853306de>] NF_HOOK include/linux/netfilter.h:314 [inline]
[<ffffffff853306de>] NF_HOOK include/linux/netfilter.h:308 [inline]
[<ffffffff853306de>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:569
[<ffffffff84d21a54>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5662
[<ffffffff84d21cd4>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:5775
[<ffffffff84d22d58>] process_backlog+0x4fc/0x1cbc net/core/dev.c:6107
[<ffffffff84d2760a>] __napi_poll.constprop.0+0xaa/0x4b8 net/core/dev.c:6771
[<ffffffff84d2842a>] napi_poll net/core/dev.c:6840 [inline]
[<ffffffff84d2842a>] net_rx_action+0xa12/0xf10 net/core/dev.c:6962
[<ffffffff800e0fba>] handle_softirqs+0x4a6/0x10de kernel/softirq.c:554
[<ffffffff800e1ebe>] __do_softirq kernel/softirq.c:588 [inline]
[<ffffffff800e1ebe>] invoke_softirq kernel/softirq.c:428 [inline]
[<ffffffff800e1ebe>] __irq_exit_rcu+0x188/0x372 kernel/softirq.c:637
[<ffffffff800e2aec>] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:649
[<ffffffff85fd94f4>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:378
[<ffffffff85ffcc1a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355