INFO: task syz.3.3041:20838 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.3.3041      state:D stack:0     pid:20838 tgid:20812 ppid:19682  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
[<ffffffff84407974>] disable_device+0x1b2/0x2ba drivers/infiniband/core/device.c:1296
[<ffffffff84407d0a>] __ib_unregister_device+0x28e/0x402 drivers/infiniband/core/device.c:1519
[<ffffffff84407f4a>] ib_unregister_device_and_put+0x56/0x82 drivers/infiniband/core/device.c:1584
[<ffffffff8445f05a>] nldev_dellink+0x212/0x314 drivers/infiniband/core/nldev.c:1825
[<ffffffff844172f0>] rdma_nl_rcv_msg+0x352/0x680 drivers/infiniband/core/netlink.c:195
[<ffffffff84417946>] rdma_nl_rcv_skb.constprop.0.isra.0+0x328/0x424 drivers/infiniband/core/netlink.c:239
[<ffffffff84417a5c>] rdma_nl_rcv+0x1a/0x24 drivers/infiniband/core/netlink.c:259
[<ffffffff852c4ee0>] netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
[<ffffffff852c4ee0>] netlink_unicast+0x4f0/0x82c net/netlink/af_netlink.c:1347
[<ffffffff852c5a80>] netlink_sendmsg+0x864/0xdc6 net/netlink/af_netlink.c:1891
[<ffffffff84e691e6>] sock_sendmsg_nosec net/socket.c:711 [inline]
[<ffffffff84e691e6>] __sock_sendmsg+0xcc/0x160 net/socket.c:726
[<ffffffff84e69df2>] ____sys_sendmsg+0x5ce/0x79e net/socket.c:2583
[<ffffffff84e73184>] ___sys_sendmsg+0x144/0x1e6 net/socket.c:2637
[<ffffffff84e73f3a>] __sys_sendmsg+0x188/0x22a net/socket.c:2669
[<ffffffff84e7404c>] __do_sys_sendmsg net/socket.c:2674 [inline]
[<ffffffff84e7404c>] __se_sys_sendmsg net/socket.c:2672 [inline]
[<ffffffff84e7404c>] __riscv_sys_sendmsg+0x70/0xa2 net/socket.c:2672
[<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/37:
 #0: ffffffff881d0c40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x2e6 kernel/locking/lockdep.c:6740
1 lock held by syslogd/2973:
2 locks held by getty/3126:
 #0: ff600000194930a0 (&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 syz-executor/3159:
2 locks held by kworker/u10:5/14886:
 #0: ff60000011471148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204
 #1: ff20000000537c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204
3 locks held by kworker/u10:6/18768:
4 locks held by kworker/u8:2/19481:
 #0: ff60000012289948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204
 #1: ff20000004737c90 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204
 #2: ffffffff895c8a70 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xda/0x984 net/core/net_namespace.c:586
 #3: ff600000213406b8 (&device->unregistration_lock){+.+.}-{4:4}, at: rdma_dev_change_netns+0x3c/0x348 drivers/infiniband/core/device.c:1667
3 locks held by kworker/u9:4/19830:
3 locks held by kworker/1:2/20182:
2 locks held by syz.3.3041/20838:
 #0: ffffffff90dce478 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg+0x172/0x680 drivers/infiniband/core/netlink.c:164
 #1: ff600000213406b8 (&device->unregistration_lock){+.+.}-{4:4}, at: __ib_unregister_device+0x200/0x402 drivers/infiniband/core/device.c:1515
2 locks held by kworker/u9:8/21257:
3 locks held by kworker/u10:8/21588:
 #0: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
 #0: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1514 [inline]
 #0: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1813 [inline]
 #0: ff6000005cdf4a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x278/0x393a kernel/sched/core.c:6680
 #1: ff6000005cde0688 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x22c/0x71a kernel/sched/psi.c:987
 #2: ff6000005cde2418 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x86/0x22c kernel/time/timer.c:1050
2 locks held by syz-executor/22016:
2 locks held by modprobe/22515:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18768 Comm: kworker/u10:6 Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound nsim_dev_trap_report_work
epc : sched_balance_update_blocked_averages+0xb72/0x173e kernel/sched/fair.c:9855
 ra : raw_spin_rq_unlock_irqrestore kernel/sched/sched.h:1542 [inline]
 ra : rq_unlock_irqrestore kernel/sched/sched.h:1821 [inline]
 ra : sched_balance_update_blocked_averages+0xe66/0x173e kernel/sched/fair.c:9870
epc : ffffffff802234b4 ra : ffffffff802237a8 sp : ff20000000017cc0
 gp : ffffffff899f4f80 tp : ff60000032604ec0 t0 : 28a5115b21b9eb17
 t1 : ffebffff0b9be948 t2 : 0000000000000028 s0 : ff20000000017e50
 s1 : 0000000000000000 a0 : 0000000000000001 a1 : ffffffff8663f920
 a2 : 0000000000000002 a3 : 0000000000000102 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : ff60000032605a78 a7 : 1fec0000064c0b4f
 s2 : ff6000005cdf4a58 s3 : ff20000000017de0 s4 : ff6000005cde0640
 s5 : ff6000005cdf5698 s6 : 0000000000000002 s7 : ff6000005cdf5400
 s8 : dfffffff00000000 s9 : ff6000005cdf4a40 s10: ff6000005cdf5588
 s11: 1fec00000b9bead3 t3 : 0000000002d2a6f1 t4 : ffebffff0b9be948
 t5 : ffebffff0b9be949 t6 : 0000000000000008
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff802234b4>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff802234b4>] raw_spin_rq_unlock_irqrestore kernel/sched/sched.h:1542 [inline]
[<ffffffff802234b4>] rq_unlock_irqrestore kernel/sched/sched.h:1821 [inline]
[<ffffffff802234b4>] sched_balance_update_blocked_averages+0xb72/0x173e kernel/sched/fair.c:9870
[<ffffffff80247de6>] sched_balance_softirq+0x128/0x19e kernel/sched/fair.c:12872
[<ffffffff8014ce16>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:554
[<ffffffff861e671c>] __do_softirq+0x12/0x1a kernel/softirq.c:588
[<ffffffff80065058>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff861e667e>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355