INFO: task syz.0.983:6286 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.983       state:D stack:0     pid:6286  tgid:6285  ppid:3194   task_flags:0x400140 flags:0x0000000c
Call Trace:
[<ffffffff8632de30>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff8632de30>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff86330f66>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff86330f66>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863454fa>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff86332aee>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff86332aee>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff86332d1e>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff86332d1e>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff80375b84>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3850
[<ffffffff8512e194>] netdev_run_todo+0x294/0x10b4 net/core/dev.c:11376
[<ffffffff8515e36c>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:157
[<ffffffff85cde56a>] ip6_mroute_setsockopt+0x29d8/0x584a net/ipv6/ip6mr.c:1728
[<ffffffff85c16ac6>] do_ipv6_setsockopt+0x3da/0x41e4 net/ipv6/ipv6_sockglue.c:415
[<ffffffff85c1a998>] ipv6_setsockopt+0xc8/0x16e net/ipv6/ipv6_sockglue.c:993
[<ffffffff85c450f8>] rawv6_setsockopt+0xe8/0x662 net/ipv6/raw.c:1046
[<ffffffff850543cc>] sock_common_setsockopt+0x90/0xc0 net/core/sock.c:3944
[<ffffffff85045086>] do_sock_setsockopt+0x208/0x400 net/socket.c:2296
[<ffffffff850509e0>] __sys_setsockopt+0x142/0x1e6 net/socket.c:2321
[<ffffffff85050b2a>] __do_sys_setsockopt net/socket.c:2327 [inline]
[<ffffffff85050b2a>] __se_sys_setsockopt net/socket.c:2324 [inline]
[<ffffffff85050b2a>] __riscv_sys_setsockopt+0xa6/0x114 net/socket.c:2324
[<ffffffff800769ae>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff86323342>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:341
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
5 locks held by kworker/1:2/825:
1 lock held by syslogd/3002:
2 locks held by getty/3154:
 #0: ffffaf8018a2b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/3182:
3 locks held by kworker/u9:3/3201:
2 locks held by kworker/1:4/3894:
2 locks held by kworker/1:1/5374:
2 locks held by kworker/1:0/6110:
3 locks held by kworker/1:3/6267:
1 lock held by syz.0.983/6286:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
3 locks held by syz-executor/6302:
2 locks held by kworker/1:7/6322:
2 locks held by kworker/0:0/6424:
1 lock held by syz.1.1002/6524:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
1 lock held by dhcpcd-run-hook/6552:
1 lock held by syz-executor/6557:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80078bbe>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000327a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff8006103e>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8006103e>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800610d2>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff862e5a74>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff862e5d2c>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff800863dc>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff804edb80>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804edb80>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804edb80>] watchdog+0xcf2/0x11de kernel/hung_task.c:470
[<ffffffff801ddcbc>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff8006977a>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff8634b8fa>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6279 Comm: kworker/1:6 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient gc_worker
epc : walk_stackframe+0x1be/0x44e arch/riscv/kernel/stacktrace.c:75
 ra : walk_stackframe+0x1be/0x44e arch/riscv/kernel/stacktrace.c:75
epc : ffffffff8007856c ra : ffffffff8007856c sp : ffff8f80000168b0
 gp : ffffffff89c83ca0 tp : ffffaf8019a84ec0 t0 : ffff8f8000016c00
 t1 : 0000000000000003 t2 : fffffffff2f20000 s0 : ffff8f8000016930
 s1 : ffff8f8000017060 a0 : 0000000000000006 a1 : ffffffff803842e4
 a2 : ffffffff8634b694 a3 : ffffffff8007856c a4 : 0000000000000000
 a5 : ffffaf8019a84ec0 a6 : 0000000000f00000 a7 : ffffffff89d8da80
 s2 : ffffffff803842e4 s3 : 000000000000000a s4 : 0000000000000000
 s5 : dfffffff00000000 s6 : ffffffff80383932 s7 : ffff8f8000017070
 s8 : dfffffff00000000 s9 : 0000000000007fff s10: ffffffff8634b694
 s11: 0000000000000007 t3 : 8940623500000000 t4 : fffffffef13b90dc
 t5 : fffffffef13b90dd t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff8007856c>] walk_stackframe+0x1be/0x44e arch/riscv/kernel/stacktrace.c:75
[<ffffffff86323596>] arch_stack_walk+0x1c/0x26 arch/riscv/kernel/stacktrace.c:165
[<ffffffff803d08a4>] stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122
[<ffffffff80af29a6>] kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47
[<ffffffff80af29fc>] kasan_save_track+0x16/0x28 mm/kasan/common.c:68
[<ffffffff80af590a>] kasan_save_alloc_info+0x30/0x3e mm/kasan/generic.c:562
[<ffffffff80af2dbe>] unpoison_slab_object mm/kasan/common.c:319 [inline]
[<ffffffff80af2dbe>] __kasan_slab_alloc+0x7c/0x82 mm/kasan/common.c:345
[<ffffffff80a53c52>] kasan_slab_alloc include/linux/kasan.h:250 [inline]
[<ffffffff80a53c52>] slab_post_alloc_hook mm/slub.c:4148 [inline]
[<ffffffff80a53c52>] slab_alloc_node mm/slub.c:4197 [inline]
[<ffffffff80a53c52>] kmem_cache_alloc_noprof+0x104/0x3d0 mm/slub.c:4204
[<ffffffff81785904>] kmem_alloc_batch+0x4e/0x158 lib/debugobjects.c:371
[<ffffffff81787a9c>] fill_pool lib/debugobjects.c:403 [inline]
[<ffffffff81787a9c>] debug_objects_fill_pool lib/debugobjects.c:725 [inline]
[<ffffffff81787a9c>] debug_objects_fill_pool+0x188/0x4e2 lib/debugobjects.c:697
[<ffffffff81787ef2>] debug_object_activate+0xfc/0x33e lib/debugobjects.c:814
[<ffffffff80383932>] debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
[<ffffffff80383932>] __call_rcu_common.constprop.0+0x3c/0x9ce kernel/rcu/tree.c:3075
[<ffffffff803842e4>] call_rcu+0xc/0x14 kernel/rcu/tree.c:3210
[<ffffffff8513d604>] call_rcu_hurry include/linux/rcupdate.h:115 [inline]
[<ffffffff8513d604>] dst_release net/core/dst.c:177 [inline]
[<ffffffff8513d604>] dst_release+0x338/0x494 net/core/dst.c:165
[<ffffffff8508f6c6>] refdst_drop include/net/dst.h:263 [inline]
[<ffffffff8508f6c6>] skb_dst_drop include/net/dst.h:275 [inline]
[<ffffffff8508f6c6>] skb_release_head_state+0x25a/0x2b6 net/core/skbuff.c:1136
[<ffffffff8509d422>] skb_release_all net/core/skbuff.c:1150 [inline]
[<ffffffff8509d422>] __kfree_skb net/core/skbuff.c:1166 [inline]
[<ffffffff8509d422>] consume_skb net/core/skbuff.c:1398 [inline]
[<ffffffff8509d422>] consume_skb+0x9e/0xfa net/core/skbuff.c:1392
[<ffffffff856d249e>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
[<ffffffff856d249e>] nft_synproxy_do_eval+0x8b6/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff856d2698>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff85603fc2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
[<ffffffff85603fc2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285
[<ffffffff85660180>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff855393e0>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855393e0>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8575e242>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8575e242>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff8575e242>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8575c2f8>] dst_input include/net/dst.h:469 [inline]
[<ffffffff8575c2f8>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:447
[<ffffffff8575e596>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff8575e596>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff8575e596>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:567
[<ffffffff8511db78>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff8511ddf8>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6090
[<ffffffff8511eff8>] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6442
[<ffffffff85123992>] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7414
[<ffffffff85124876>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff85124876>] net_rx_action+0xad4/0xefc net/core/dev.c:7605
[<ffffffff8015e7ae>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff8015f8fa>] __do_softirq kernel/softirq.c:613 [inline]
[<ffffffff8015f8fa>] invoke_softirq kernel/softirq.c:453 [inline]
[<ffffffff8015f8fa>] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:680
[<ffffffff80161300>] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:696
[<ffffffff86322b04>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:388
[<ffffffff8634b942>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360