INFO: task kworker/u9:2:4162 blocked for more than 430 seconds.
      Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u9:2    state:D stack:0     pid:4162  tgid:4162  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events_unbound bpf_map_free_deferred
Call Trace:
[<ffffffff863ce5c0>] context_switch kernel/sched/core.c:5357 [inline]
[<ffffffff863ce5c0>] __schedule+0x1042/0x4106 kernel/sched/core.c:6961
[<ffffffff863d1748>] __schedule_loop kernel/sched/core.c:7043 [inline]
[<ffffffff863d1748>] schedule+0xc4/0x35e kernel/sched/core.c:7058
[<ffffffff863e72b2>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff863d32fe>] do_wait_for_common kernel/sched/completion.c:100 [inline]
[<ffffffff863d32fe>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:121
[<ffffffff863d352e>] wait_for_common kernel/sched/completion.c:132 [inline]
[<ffffffff863d352e>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:153
[<ffffffff8038232e>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3883
[<ffffffff8076c816>] dev_map_free+0x11c/0x6bc kernel/bpf/devmap.c:214
[<ffffffff805eb838>] bpf_map_free kernel/bpf/syscall.c:864 [inline]
[<ffffffff805eb838>] bpf_map_free_deferred+0x24a/0x4a8 kernel/bpf/syscall.c:891
[<ffffffff801c7a44>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3236
[<ffffffff801cab54>] process_scheduled_works kernel/workqueue.c:3319 [inline]
[<ffffffff801cab54>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3400
[<ffffffff801e843c>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff800699c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff863ed6b6>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff883dd9a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6771
2 locks held by getty/3162:
 #0: ffffaf801d4630a0 (&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 sshd/3193:
1 lock held by syz-executor/3201:
3 locks held by kworker/u10:5/3495:
2 locks held by kworker/1:2/3801:
3 locks held by kworker/u9:2/4162:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3211
 #1: ffff8f8007767b70 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3211
 #2: ffffffff883eda40 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3815
3 locks held by kworker/u9:6/4506:
3 locks held by kworker/u9:7/4615:
 #0: ffffaf806ed5b118 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:636 [inline]
 #0: ffffaf806ed5b118 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
 #0: ffffaf806ed5b118 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1841 [inline]
 #0: ffffaf806ed5b118 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x310/0x4106 kernel/sched/core.c:6865
 #1: ffffaf806ed23610 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
 #1: ffffaf806ed23610 (psi_seq){-.-.}-{0:0}, at: __schedule+0x1406/0x4106 kernel/sched/core.c:6955
 #2: ffffaf806ed25058 (&base->lock){-.-.}-{2:2}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
 #2: ffffaf806ed25058 (&base->lock){-.-.}-{2:2}, at: cpus_read_lock+0x14/0x1c kernel/cpu.c:491
2 locks held by syz-executor/4619:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007949a>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000329a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80060b76>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060b76>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff80060c0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff8638596a>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86385c22>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff8008705c>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff805000a4>] trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
[<ffffffff805000a4>] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
[<ffffffff805000a4>] watchdog+0xc56/0x1134 kernel/hung_task.c:491
[<ffffffff801e843c>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff800699c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff863ed6b6>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 4615 Comm: kworker/u9:7 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound nsim_dev_trap_report_work
epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
epc : _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 ra : _raw_spin_unlock_irqrestore+0x86/0xd4 kernel/locking/spinlock.c:194
epc : ffffffff863e8dca ra : ffffffff863e8e1a sp : ffff8f800cf17670
 gp : ffffffff89c9e5c0 tp : ffffaf8012ae1a40 t0 : ffff8f800cf176f0
 t1 : fffffffef21f0db3 t2 : 0000000008865e16 s0 : ffff8f800cf17690
 s1 : 0000000000000002 a0 : 0000000000000000 a1 : ffffffff87d8a7a8
 a2 : 0000000000000006 a3 : 0000000000000002 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000000003 a7 : ffffffff90f86d9b
 s2 : ffffffff90f86d98 s3 : dead000000000100 s4 : dead000000000122
 s5 : dfffffff00000000 s6 : ffffaf801f2f3730 s7 : ffffaf801f2f3640
 s8 : 0000000000000056 s9 : 0000000000000056 s10: ffffaf801f2f3730
 s11: ffffaf801f2f3000 t3 : c8af11f900000000 t4 : fffffffef21f0db3
 t5 : fffffffef21f0db4 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff863e8dca>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff863e8dca>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff863e8dca>] _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194
[<ffffffff817e430c>] __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
[<ffffffff817e430c>] debug_check_no_obj_freed+0x26a/0x4fe lib/debugobjects.c:1129
[<ffffffff80a7c816>] slab_free_hook mm/slub.c:2348 [inline]
[<ffffffff80a7c816>] slab_free mm/slub.c:4680 [inline]
[<ffffffff80a7c816>] kmem_cache_free+0x2a0/0x562 mm/slub.c:4782
[<ffffffff85125448>] kfree_skbmem+0x1b4/0x1ee net/core/skbuff.c:1109
[<ffffffff85148168>] __kfree_skb net/core/skbuff.c:1166 [inline]
[<ffffffff85148168>] consume_skb net/core/skbuff.c:1397 [inline]
[<ffffffff85148168>] consume_skb+0xd8/0xfa net/core/skbuff.c:1391
[<ffffffff83744d48>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:836 [inline]
[<ffffffff83744d48>] nsim_dev_trap_report_work+0x8b6/0xc96 drivers/net/netdevsim/dev.c:866
[<ffffffff801c7a44>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3236
[<ffffffff801cab54>] process_scheduled_works kernel/workqueue.c:3319 [inline]
[<ffffffff801cab54>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3400
[<ffffffff801e843c>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff800699c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff863ed6b6>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327