INFO: task syz-executor:16678 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:16678 tgid:16678 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
[<ffffffff85fe6f9c>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6824
[<ffffffff85fea818>] __mutex_lock_common kernel/locking/mutex.c:684 [inline]
[<ffffffff85fea818>] __mutex_lock+0x86a/0x1022 kernel/locking/mutex.c:752
[<ffffffff85feafe4>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:804
[<ffffffff802d8120>] rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
[<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
INFO: task syz.0.683:17100 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.0.683       state:D stack:0     pid:17100 tgid:17100 ppid:15866  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
[<ffffffff85fdac58>] resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
[<ffffffff85fdac58>] exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
[<ffffffff85fdac58>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdac58>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdac58>] syscall_exit_to_user_mode+0x30a/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:
2 locks held by ksoftirqd/0/16:
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
1 lock held by klogd/2998:
2 locks held by getty/3151:
 #0: ff600000187850a0 (&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/3177:
3 locks held by kworker/0:3/9874:
2 locks held by kworker/0:6/12954:
4 locks held by kworker/0:1/14183:
2 locks held by kworker/0:4/15054:
7 locks held by syz-executor/16678:
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff60000030c4d888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b5f6968 (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: ff600000187b60e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff600000187b60e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff600000187b60e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff6000001c50f250 (&devlink->lock_key#18){+.+.}-{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
1 lock held by syz.0.683/17100:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
4 locks held by syz-executor/17112:
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000001d209488 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b5f6968 (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
2 locks held by kworker/0:7/17439:
4 locks held by syz-executor/17440:
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001bf0c420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000003b886888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b5f6968 (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 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17439 Comm: kworker/0:7 Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
epc : synproxy_parse_options+0x19c/0x7ba net/netfilter/nf_synproxy_core.c:38
 ra : __skb_header_pointer include/linux/skbuff.h:4153 [inline]
 ra : skb_header_pointer include/linux/skbuff.h:4164 [inline]
 ra : synproxy_parse_options+0x19c/0x7ba net/netfilter/nf_synproxy_core.c:37
epc : ffffffff851cf4b0 ra : ffffffff851cf4b0 sp : ff20000000007070
 gp : ffffffff897bea80 tp : ff6000002a13b480 t0 : ff20000000007540
 t1 : 0000000000000000 t2 : 0000000000000006 s0 : ff200000000071b0
 s1 : ff6000001ba7c928 a0 : 0000000000000004 a1 : 0000000000000000
 a2 : 0000000000f00000 a3 : ffffffff851cf4b0 a4 : 0000000000000000
 a5 : ff6000002a13b480 a6 : 0000000000f00000 a7 : 1fec0000054277fd
 s2 : 0000000000000000 s3 : 0000000000000000 s4 : 1fe4000000000e14
 s5 : ff20000000007220 s6 : ff6000002e749280 s7 : ff200000000070d0
 s8 : 0000000000000028 s9 : ff6000001ba7c900 s10: ff200000000072a0
 s11: ff6000001ba7c914 t3 : 1fec000005dcca02 t4 : ffffffff87217028
 t5 : ff6000002f340138 t6 : 1fec000005427807
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff851cf4b0>] __skb_header_pointer include/linux/skbuff.h:4153 [inline]
[<ffffffff851cf4b0>] skb_header_pointer include/linux/skbuff.h:4164 [inline]
[<ffffffff851cf4b0>] synproxy_parse_options+0x19c/0x7ba net/netfilter/nf_synproxy_core.c:37
[<ffffffff852a6bc2>] nft_synproxy_do_eval+0x312/0xa52 net/netfilter/nft_synproxy.c:134
[<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
[<ffffffff85ffcca8>] __do_softirq+0x12/0x1a kernel/softirq.c:588
[<ffffffff80006f74>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff85ffcc0a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355