INFO: task syz.0.871:7672 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.0.871       state:D stack:0     pid:7672  tgid:7671  ppid:6640   flags:0x00000002
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:
2 locks held by kworker/0:0/8:
3 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
2 locks held by getty/3151:
 #0: ff6000001b15d0a0 (&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 syz-executor/3177:
2 locks held by kworker/0:5/3947:
4 locks held by kworker/0:2/5180:
1 lock held by syz.0.871/7672:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
1 lock held by syz.1.874/7678:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
3 locks held by kworker/0:6/7684:
7 locks held by syz-executor/7686:
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000002c107888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b6a53c8 (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: ff6000002d01d0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff6000002d01d0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff6000002d01d0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff6000002d01c250 (&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
4 locks held by syz-executor/7694:
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d448420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000002c66e088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001b6a53c8 (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
5 locks held by kworker/0:9/7773:
2 locks held by kworker/0:10/8020:

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

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: 7773 Comm: kworker/0:9 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 : __sanitizer_cov_trace_const_cmp4+0x1c/0x24 kernel/kcov.c:316
 ra : __sanitizer_cov_trace_const_cmp4+0x1c/0x24 kernel/kcov.c:314
epc : ffffffff80430ad2 ra : ffffffff80430ad2 sp : ff200000000066c0
 gp : ffffffff897bea80 tp : ff6000001b3ecec0 t0 : ff20000000006a20
 t1 : ff6000001b3eda80 t2 : 0000000000000006 s0 : ff200000000066d0
 s1 : ff20000000006750 a0 : 0000000000000005 a1 : 0000000000000000
 a2 : 00000000ffffffff a3 : ffffffff80010480 a4 : 0000000000000000
 a5 : ff6000001b3ecec0 a6 : 0000000000f00000 a7 : 0000000056e543b7
 s2 : ff200000000066d0 s3 : ffffffffffffffff s4 : 0000000000000001
 s5 : 0000000000000000 s6 : ffffffff80010394 s7 : dfffffff00000000
 s8 : dfffffff00000000 s9 : ffffffff85ffc970 s10: 0000000000007fff
 s11: 00000000000bb398 t3 : 1fec00000367db3b t4 : 000000000000000f
 t5 : 8374b928a67c3bc0 t6 : 1fec00000367db54
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80430ad2>] __sanitizer_cov_trace_const_cmp4+0x1c/0x24 kernel/kcov.c:314
[<ffffffff80010480>] walk_stackframe+0xec/0x452 arch/riscv/kernel/stacktrace.c:57
[<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
[<ffffffff809720c4>] kasan_save_alloc_info+0x30/0x3e mm/kasan/generic.c:565
[<ffffffff8096f778>] unpoison_slab_object mm/kasan/common.c:319 [inline]
[<ffffffff8096f778>] __kasan_slab_alloc+0x7c/0x82 mm/kasan/common.c:345
[<ffffffff808dbb3a>] kasan_slab_alloc include/linux/kasan.h:247 [inline]
[<ffffffff808dbb3a>] slab_post_alloc_hook mm/slub.c:4086 [inline]
[<ffffffff808dbb3a>] slab_alloc_node mm/slub.c:4135 [inline]
[<ffffffff808dbb3a>] kmem_cache_alloc_noprof+0x1a2/0x304 mm/slub.c:4142
[<ffffffff84d3c5f8>] dst_alloc+0x94/0x174 net/core/dst.c:89
[<ffffffff85308ac2>] rt_dst_alloc+0x3a/0x340 net/ipv4/route.c:1612
[<ffffffff85320e32>] __mkroute_output net/ipv4/route.c:2573 [inline]
[<ffffffff85320e32>] ip_route_output_key_hash_rcu+0x822/0x2748 net/ipv4/route.c:2795
[<ffffffff85322eb0>] ip_route_output_key_hash+0x158/0x31c net/ipv4/route.c:2624
[<ffffffff85323a5e>] __ip_route_output_key include/net/route.h:141 [inline]
[<ffffffff85323a5e>] ip_route_output_flow+0x2a/0x142 net/ipv4/route.c:2852
[<ffffffff855bcefe>] ip_route_output_key include/net/route.h:151 [inline]
[<ffffffff855bcefe>] ip_route_me_harder+0x4e4/0x1158 net/ipv4/netfilter.c:53
[<ffffffff851cf000>] synproxy_send_tcp.isra.0+0x2be/0x5d2 net/netfilter/nf_synproxy_core.c:431
[<ffffffff851d10a0>] synproxy_send_client_synack+0x940/0xc9a net/netfilter/nf_synproxy_core.c:484
[<ffffffff852a715c>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff852a715c>] nft_synproxy_do_eval+0x8ac/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
[<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