INFO: task syz.1.2339:18306 blocked for more than 430 seconds.
      Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2339      state:D stack:0     pid:18306 tgid:18305 ppid:16857  flags:0x0000000c
Call Trace:
[<ffffffff861cbf70>] context_switch kernel/sched/core.c:5369 [inline]
[<ffffffff861cbf70>] __schedule+0xdaa/0x393a kernel/sched/core.c:6756
[<ffffffff861cebc4>] __schedule_loop kernel/sched/core.c:6833 [inline]
[<ffffffff861cebc4>] schedule+0xc4/0x324 kernel/sched/core.c:6848
[<ffffffff861e2236>] schedule_timeout+0x1c6/0x28a kernel/time/sleep_timeout.c:75
[<ffffffff861d06a8>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff861d06a8>] __wait_for_common+0x1ca/0x4b6 kernel/sched/completion.c:116
[<ffffffff861d09ae>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff861d09ae>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff801aee54>] __flush_work+0x5ee/0xcba kernel/workqueue.c:4231
[<ffffffff801b0b32>] __cancel_work_sync+0x136/0x15a kernel/workqueue.c:4351
[<ffffffff801b4e46>] cancel_delayed_work_sync+0x1c/0x26 kernel/workqueue.c:4425
[<ffffffff85502c0a>] htable_put.part.0+0x1a0/0x278 net/netfilter/xt_hashlimit.c:429
[<ffffffff85504f66>] htable_put net/netfilter/xt_hashlimit.c:424 [inline]
[<ffffffff85504f66>] hashlimit_mt_destroy+0x7e/0xa6 net/netfilter/xt_hashlimit.c:977
[<ffffffff85b15a18>] cleanup_match net/ipv6/netfilter/ip6_tables.c:477 [inline]
[<ffffffff85b15a18>] cleanup_entry+0x15e/0x326 net/ipv6/netfilter/ip6_tables.c:661
[<ffffffff85b168d4>] translate_table+0xcf4/0x15da net/ipv6/netfilter/ip6_tables.c:744
[<ffffffff85b1c8c8>] do_replace+0x2f8/0x432 net/ipv4/netfilter/ip_tables.c:1137
[<ffffffff85b1cda0>] do_ip6t_set_ctl+0x39e/0x916 net/ipv6/netfilter/ip6_tables.c:1644
[<ffffffff8532fdf6>] nf_setsockopt+0x78/0xda net/netfilter/nf_sockopt.c:101
[<ffffffff859eff72>] ipv6_setsockopt+0x13c/0x16e net/ipv6/ipv6_sockglue.c:998
[<ffffffff85a18e42>] rawv6_setsockopt+0xe8/0x64c net/ipv6/raw.c:1054
[<ffffffff84e75a40>] sock_common_setsockopt+0x90/0xc0 net/core/sock.c:3814
[<ffffffff84e66fe2>] do_sock_setsockopt+0x208/0x400 net/socket.c:2313
[<ffffffff84e72420>] __sys_setsockopt+0x140/0x1cc net/socket.c:2338
[<ffffffff84e72552>] __do_sys_setsockopt net/socket.c:2344 [inline]
[<ffffffff84e72552>] __se_sys_setsockopt net/socket.c:2341 [inline]
[<ffffffff84e72552>] __riscv_sys_setsockopt+0xa6/0x114 net/socket.c:2341
[<ffffffff80070302>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff861c1fae>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff861e652a>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
1 lock held by khungtaskd/38:
 #0: ffffffff881d0c40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x2e6 kernel/locking/lockdep.c:6740
1 lock held by klogd/2979:
2 locks held by getty/3128:
 #0: ff6000001881f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
2 locks held by sshd/3153:
3 locks held by kworker/u10:16/14685:
4 locks held by kworker/u10:2/16034:
2 locks held by kworker/0:4/16796:
3 locks held by kworker/u10:9/17898:
3 locks held by kworker/u10:18/17909:
3 locks held by kworker/u10:24/17918:
3 locks held by kworker/u10:28/17925:
1 lock held by syz-executor/18344:
 #0: ffffffff895df208 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79
2 locks held by kworker/u10:3/18485:
2 locks held by kworker/1:2/18618:
2 locks held by kworker/0:3/19023:
3 locks held by kworker/u8:0/19115:
 #0: ff6000001854b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204
 #1: ff20000002b87c90 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204
 #2: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
 #2: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1514 [inline]
 #2: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1813 [inline]
 #2: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x278/0x393a kernel/sched/core.c:6680
2 locks held by syz.2.2338/19130:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80071bae>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff8000325c>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:136
[<ffffffff8005e1f4>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8005e1f4>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff8005e288>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff86185c28>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86185ee0>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff8007c972>] arch_trigger_cpumask_backtrace+0x2c/0x3e arch/riscv/kernel/smp.c:347
[<ffffffff804b88b8>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff804b88b8>] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
[<ffffffff804b88b8>] watchdog+0xcee/0x1170 kernel/hung_task.c:397
[<ffffffff801c6f2c>] kthread+0x28c/0x3a4 kernel/kthread.c:389
[<ffffffff861e6642>] 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: 19023 Comm: kworker/0:3 Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient htable_gc
epc : preempt_count include/asm-generic/preempt.h:11 [inline]
epc : should_resched include/asm-generic/preempt.h:77 [inline]
epc : __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:389
 ra : __local_bh_enable_ip+0x38a/0x5e8 kernel/softirq.c:387
epc : ffffffff8014eeb6 ra : ffffffff8014eeb2 sp : ff200000035879b0
 gp : ffffffff899f4f80 tp : ff60000018990000 t0 : b2688b2093a48f2b
 t1 : ffe3ffff0044b209 t2 : 0000000000000788 s0 : ff20000003587a00
 s1 : ff6000005cdd2940 a0 : 0000000000000000 a1 : 0000000000000000
 a2 : 0000000000000000 a3 : ffffffff816251ee a4 : 0000000000000001
 a5 : 00000000000091db a6 : 0000000000000003 a7 : 1fec00000313216d
 s2 : 0000000000000000 s3 : ffffffff855019f2 s4 : 0000000000000001
 s5 : ffffffff90da1fc0 s6 : 1fec000003132001 s7 : ffffffff89a32be0
 s8 : ffffffff880101c0 s9 : 1ffffffff1002038 s10: 1fe400000044b211
 s11: 0000000000000000 t3 : ff60000018990b20 t4 : ffe3ffff0044b209
 t5 : ffe3ffff0044b20a t6 : 000000000000000f
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff8014eeb6>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff8014eeb6>] __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:387
[<ffffffff861e4012>] __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
[<ffffffff861e4012>] _raw_spin_unlock_bh+0x34/0x40 kernel/locking/spinlock.c:210
[<ffffffff855019f2>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
[<ffffffff855019f2>] htable_selective_cleanup+0x252/0x420 net/netfilter/xt_hashlimit.c:374
[<ffffffff855026d0>] htable_gc+0x20/0xaa net/netfilter/xt_hashlimit.c:385
[<ffffffff801a7a24>] process_one_work+0x968/0x1f38 kernel/workqueue.c:3229
[<ffffffff801a95b2>] process_scheduled_works kernel/workqueue.c:3310 [inline]
[<ffffffff801a95b2>] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391
[<ffffffff801c6f2c>] kthread+0x28c/0x3a4 kernel/kthread.c:389
[<ffffffff861e6642>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326