INFO: task syz.1.59:4374 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.1.59        state:D stack:0     pid:4374  tgid:4374  ppid:3951   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
[<ffffffff82f49524>] tun_detach drivers/net/tun.c:704 [inline]
[<ffffffff82f49524>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3517
[<ffffffff80a2c748>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce5c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb6c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff800d8f3c>] exit_task_work include/linux/task_work.h:40 [inline]
[<ffffffff800d8f3c>] do_exit+0xa4c/0x2986 kernel/exit.c:939
[<ffffffff800db3d6>] do_group_exit+0xd4/0x26c kernel/exit.c:1088
[<ffffffff8010db26>] get_signal+0x1e98/0x23b0 kernel/signal.c:2917
[<ffffffff8000bb06>] arch_do_signal_or_restart+0x8d6/0x1190 arch/riscv/kernel/signal.c:437
[<ffffffff85fdabf4>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fdabf4>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdabf4>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdabf4>] syscall_exit_to_user_mode+0x2a6/0x31e kernel/entry/common.c:218
[<ffffffff85fd9b16>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff85ffcab6>] _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_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
2 locks held by kworker/1:1/34:
1 lock held by khungtaskd/38:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by kworker/1:2/930:
1 lock held by kworker/R-dm_bu/1602:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
2 locks held by getty/3150:
 #0: ff6000001d3900a0 (&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
1 lock held by syz-executor/3177:
1 lock held by kworker/R-wg-cr/3362:
 #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/3380:
 #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/3383:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
5 locks held by kworker/R-wg-cr/3386:
1 lock held by kworker/R-wg-cr/3389:
 #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
2 locks held by kworker/1:0/3709:
1 lock held by kworker/0:2/3773:
 #0: ffffffff87e86d68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2669
2 locks held by kworker/1:3/3815:
2 locks held by kworker/1:4/3872:
2 locks held by kworker/1:5/3873:
2 locks held by kworker/1:6/3879:
1 lock held by syz.1.16/3929:
 #0: ff6000001543a048 (mapping.invalidate_lock#2){+.+.}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline]
 #0: ff6000001543a048 (mapping.invalidate_lock#2){+.+.}-{3:3}, at: blkdev_fallocate+0x1ac/0x30a block/fops.c:808
1 lock held by kworker/R-wg-cr/4054:
 #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/4058:
 #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/4062:
1 lock held by syz.1.59/4374:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:7/4380:
3 locks held by kworker/1:2H/4381:
7 locks held by syz-executor/4409:
 #0: ff6000001beb4420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001beb4420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001beb4420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001beb4420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000003597c488 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b7c31e8 (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: ff6000001b3d90e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff6000001b3d90e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff6000001b3d90e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff6000001b3dd250 (&devlink->lock_key#3){+.+.}-{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/1:8/4414:
2 locks held by kworker/1:9/4415:
2 locks held by kworker/1:10/4505:
2 locks held by kworker/1:11/4560:
2 locks held by kworker/1:12/4562:
2 locks held by kworker/u9:5/4602:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000064d7c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
3 locks held by kworker/0:0/4740:
2 locks held by kworker/1:13/4741:
2 locks held by syz-executor/4750:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 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: 4381 Comm: kworker/1:2H Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: kblockd blk_mq_timeout_work
epc : __sanitizer_cov_trace_pc+0x0/0x7a kernel/kcov.c:210
 ra : fp_is_valid arch/riscv/kernel/stacktrace.c:25 [inline]
 ra : walk_stackframe+0xf8/0x452 arch/riscv/kernel/stacktrace.c:60
epc : ffffffff804308f2 ra : ffffffff8001048c sp : ff20000000016bd0
 gp : ffffffff897bea80 tp : ff60000013a9b480 t0 : ff20000000016f20
 t1 : fffffffef2146897 t2 : 0000000000000001 s0 : ff20000000016c50
 s1 : ff20000000017060 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000000001 a3 : ffffffff80010582 a4 : 0000000000000000
 a5 : ff60000013a9b480 a6 : 0000000000f00000 a7 : 1fec0000027537fd
 s2 : ff20000000017030 s3 : 0000000000000007 s4 : 0000000000000001
 s5 : 0000000000000000 s6 : ffffffff84c971a4 s7 : dfffffff00000000
 s8 : dfffffff00000000 s9 : ffffffff85ffc970 s10: 0000000000007fff
 s11: ff20000000017060 t3 : 1fec0000027537f3 t4 : fffffffef2146897
 t5 : fffffffef2146898 t6 : 1fec000002753811
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff804308f2>] __sanitizer_cov_trace_pc+0x0/0x7a kernel/kcov.c:442
[<ffffffff85fd9d60>] arch_stack_walk+0x1c/0x24 arch/riscv/kernel/stacktrace.c:163
[<ffffffff80329c04>] stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122
[<ffffffff8096f35a>] kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47
[<ffffffff8096f3b0>] kasan_save_track+0x16/0x28 mm/kasan/common.c:68
[<ffffffff80972112>] kasan_save_free_info+0x40/0x5a mm/kasan/generic.c:579
[<ffffffff8096f6ce>] poison_slab_object mm/kasan/common.c:247 [inline]
[<ffffffff8096f6ce>] __kasan_slab_free+0x4e/0x68 mm/kasan/common.c:264
[<ffffffff808d6eb2>] kasan_slab_free include/linux/kasan.h:230 [inline]
[<ffffffff808d6eb2>] slab_free_hook mm/slub.c:2343 [inline]
[<ffffffff808d6eb2>] slab_free mm/slub.c:4580 [inline]
[<ffffffff808d6eb2>] kfree+0x13c/0x4ce mm/slub.c:4728
[<ffffffff84c971a4>] skb_kfree_head net/core/skbuff.c:1086 [inline]
[<ffffffff84c971a4>] skb_free_head+0x230/0x2ec net/core/skbuff.c:1098
[<ffffffff84ca2942>] skb_release_data+0x6ec/0x86a net/core/skbuff.c:1125
[<ffffffff84cb040e>] skb_release_all net/core/skbuff.c:1190 [inline]
[<ffffffff84cb040e>] __kfree_skb net/core/skbuff.c:1204 [inline]
[<ffffffff84cb040e>] consume_skb net/core/skbuff.c:1436 [inline]
[<ffffffff84cb040e>] consume_skb+0xca/0xfa net/core/skbuff.c:1430
[<ffffffff852a7166>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
[<ffffffff852a7166>] nft_synproxy_do_eval+0x8b6/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff852a7360>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff851dd7b2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
[<ffffffff851dd7b2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:288
[<ffffffff8523728c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<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