INFO: task syz.0.2192:9340 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2192      state:D stack:0     pid:9340  tgid:9338  ppid:3203   task_flags:0x400140 flags:0x00000003
Call Trace:
[<ffffffff86486fbc>] context_switch kernel/sched/core.c:5325 [inline]
[<ffffffff86486fbc>] __schedule+0x1042/0x4114 kernel/sched/core.c:6929
[<ffffffff8648a152>] __schedule_loop kernel/sched/core.c:7011 [inline]
[<ffffffff8648a152>] schedule+0xc4/0x35e kernel/sched/core.c:7026
[<ffffffff8649fbea>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff8648bd02>] do_wait_for_common kernel/sched/completion.c:100 [inline]
[<ffffffff8648bd02>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:121
[<ffffffff8648bf32>] wait_for_common kernel/sched/completion.c:132 [inline]
[<ffffffff8648bf32>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:153
[<ffffffff8470c69a>] disable_device+0x1b2/0x2ba drivers/infiniband/core/device.c:1325
[<ffffffff8470ca30>] __ib_unregister_device+0x28e/0x402 drivers/infiniband/core/device.c:1555
[<ffffffff8470cc70>] ib_unregister_device_and_put+0x56/0x82 drivers/infiniband/core/device.c:1620
[<ffffffff84767624>] nldev_dellink+0x220/0x32c drivers/infiniband/core/nldev.c:1827
[<ffffffff8471c098>] rdma_nl_rcv_msg+0x352/0x680 drivers/infiniband/core/netlink.c:195
[<ffffffff8471c6d0>] rdma_nl_rcv_skb.constprop.0.isra.0+0x30a/0x406 drivers/infiniband/core/netlink.c:239
[<ffffffff8471c7e6>] rdma_nl_rcv+0x1a/0x24 drivers/infiniband/core/netlink.c:259
[<ffffffff8564675e>] netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
[<ffffffff8564675e>] netlink_unicast+0x544/0x88a net/netlink/af_netlink.c:1346
[<ffffffff856472f4>] netlink_sendmsg+0x850/0xdc8 net/netlink/af_netlink.c:1896
[<ffffffff851a9b8a>] sock_sendmsg_nosec net/socket.c:727 [inline]
[<ffffffff851a9b8a>] __sock_sendmsg+0xcc/0x160 net/socket.c:742
[<ffffffff851aa83e>] ____sys_sendmsg+0x640/0x79e net/socket.c:2630
[<ffffffff851b457e>] ___sys_sendmsg+0x144/0x1e6 net/socket.c:2684
[<ffffffff851b565a>] __sys_sendmsg+0x188/0x246 net/socket.c:2716
[<ffffffff851b5788>] __do_sys_sendmsg net/socket.c:2721 [inline]
[<ffffffff851b5788>] __se_sys_sendmsg net/socket.c:2719 [inline]
[<ffffffff851b5788>] __riscv_sys_sendmsg+0x70/0xa2 net/socket.c:2719
[<ffffffff800770dc>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff8647c64e>] do_trap_ecall_u+0x39e/0x53a arch/riscv/kernel/traps.c:343
[<ffffffff864a5f52>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:198

Showing all locks held in the system:
1 lock held by khungtaskd/38:
 #0: ffffffff885df120 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6771
2 locks held by syslogd/3011:
2 locks held by getty/3166:
 #0: ffffaf801d6d30a0 (&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
2 locks held by syz-executor/3196:
4 locks held by kworker/u10:4/4602:
3 locks held by kworker/u9:3/7730:
 #0: ffffaf806ecf3198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:638 [inline]
 #0: ffffaf806ecf3198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1546 [inline]
 #0: ffffaf806ecf3198 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1868 [inline]
 #0: ffffaf806ecf3198 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x310/0x4114 kernel/sched/core.c:6833
 #1: ffffaf806ecdd610 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
 #1: ffffaf806ecdd610 (psi_seq){-.-.}-{0:0}, at: __schedule+0x1408/0x4114 kernel/sched/core.c:6923
 #2: ffffaf806ecdf058 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x156/0x1f4 kernel/time/timer.c:1004
2 locks held by kworker/1:1/9202:
2 locks held by syz.0.2192/9340:
 #0: ffffffff912ae678 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg+0x172/0x680 drivers/infiniband/core/netlink.c:164
 #1: ffffaf8032184700 (&device->unregistration_lock){+.+.}-{4:4}, at: __ib_unregister_device+0x200/0x402 drivers/infiniband/core/device.c:1551
1 lock held by syz-executor/9362:
3 locks held by syz.1.2278/9895:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007941a>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000329a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80060c50>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060c50>] dump_stack_lvl+0x12a/0x1a2 lib/dump_stack.c:120
[<ffffffff80060ce4>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff8643e12e>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff8643e3e6>] nmi_trigger_cpumask_backtrace+0x2b6/0x45a lib/nmi_backtrace.c:62
[<ffffffff80087228>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff80506126>] trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
[<ffffffff80506126>] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
[<ffffffff80506126>] watchdog+0xf58/0x11ac kernel/hung_task.c:495
[<ffffffff801e7768>] kthread+0x39c/0x7d6 kernel/kthread.c:463
[<ffffffff800699de>] ret_from_fork_kernel+0x2a/0xbc6 arch/riscv/kernel/process.c:214
[<ffffffff864a6072>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8948 Comm: kworker/u10:1 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound toggle_allocation_gate
epc : __might_sleep+0x0/0xca kernel/sched/core.c:8842
 ra : __mutex_lock_common kernel/locking/mutex.c:575 [inline]
 ra : __mutex_lock+0xf4/0x19b4 kernel/locking/mutex.c:760
epc : ffffffff8021702c ra : ffffffff86491b80 sp : ffff8f8002bd7590
 gp : ffffffff89eb7800 tp : ffffaf8030fcb500 t0 : ffff8f8007b26ec0
 t1 : fffffffef221c6f4 t2 : ffff8f8007b27320 s0 : ffff8f8002bd7770
 s1 : ffffffff8849d540 a0 : ffffffff86a49000 a1 : 000000000000023f
 a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffff80091fd6
 a5 : 0000000000000001 a6 : fffffffff3f3f3f3 a7 : fffffffff200f1f1
 s2 : ffff8f8002bd7700 s3 : 0000000000000000 s4 : 0000000000000000
 s5 : ffff8f8002bd7690 s6 : ffffffff89fc4160 s7 : dfffffff00000000
 s8 : 0000000000000002 s9 : ffffffffffffffff s10: ffff8f8002bd7670
 s11: 0000000000000000 t3 : 7a2d786400000000 t4 : fffffffef221c6f4
 t5 : fffffffef221c6f5 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff8021702c>] preempt_count include/asm-generic/preempt.h:11 [inline]
[<ffffffff8021702c>] print_preempt_disable_ip kernel/sched/core.c:8863 [inline]
[<ffffffff8021702c>] __might_sleep+0x0/0xca kernel/sched/core.c:8922
[<ffffffff86493454>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:812
[<ffffffff80091fd6>] arch_jump_label_transform_queue+0x192/0x312 arch/riscv/kernel/jump_label.c:44
[<ffffffff8084fd20>] __jump_label_update+0x11c/0x3ee kernel/jump_label.c:513
[<ffffffff80850314>] jump_label_update+0x322/0x52c kernel/jump_label.c:919
[<ffffffff80850956>] static_key_enable_cpuslocked+0x1e0/0x286 kernel/jump_label.c:210
[<ffffffff80850a1e>] static_key_enable+0x22/0x34 kernel/jump_label.c:223
[<ffffffff80b56cac>] toggle_allocation_gate mm/kfence/core.c:852 [inline]
[<ffffffff80b56cac>] toggle_allocation_gate+0x11c/0x26c mm/kfence/core.c:844
[<ffffffff801c6f18>] process_one_work+0x96a/0x1f3a kernel/workqueue.c:3263
[<ffffffff801ca030>] process_scheduled_works kernel/workqueue.c:3346 [inline]
[<ffffffff801ca030>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3427
[<ffffffff801e7768>] kthread+0x39c/0x7d6 kernel/kthread.c:463
[<ffffffff800699de>] ret_from_fork_kernel+0x2a/0xbc6 arch/riscv/kernel/process.c:214
[<ffffffff864a6072>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328