INFO: task kworker/u10:1:4198 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u10:1   state:D stack:0     pid:4198  tgid:4198  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events_unbound free_mem_alloc_deferred
Call Trace:
[<ffffffff86388df4>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff86388df4>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff8638bf2a>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff8638bf2a>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863a0702>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff8638dab2>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff8638dab2>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff8638dce2>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff8638dce2>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff80373490>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3850
[<ffffffff806ffe9e>] free_mem_alloc kernel/bpf/memalloc.c:702 [inline]
[<ffffffff806ffe9e>] free_mem_alloc_deferred+0x24/0xee kernel/bpf/memalloc.c:713
[<ffffffff801bb13c>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3238
[<ffffffff801be24c>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801be24c>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3402
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327

Showing all locks held in the system:
2 locks held by kworker/1:0/24:
1 lock held by khungtaskd/36:
 #0: ffffffff883dc3a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
1 lock held by syslogd/2982:
2 locks held by getty/3136:
 #0: ffffaf801cef20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/3164:
3 locks held by kworker/u10:1/4198:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f8006e57b70 ((work_completion)(&copy->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff883ec5c0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/0:6/4226:
2 locks held by kworker/0:4/4563:
2 locks held by kworker/0:7/4738:
2 locks held by kworker/u10:7/4761:
2 locks held by kworker/0:10/4790:
3 locks held by kworker/u10:5/4910:
2 locks held by syz.0.399/4919:
2 locks held by syz-executor/4922:
2 locks held by dhcpcd-run-hook/4923:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80078a80>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000327a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80061012>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80061012>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800610a6>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff86340a50>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86340d08>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff800847ac>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff804ea4a8>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804ea4a8>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804ea4a8>] watchdog+0xcea/0x1618 kernel/hung_task.c:470
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] 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: 15 Comm: ksoftirqd/0 Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : kasan_quarantine_put+0x8a/0x1fa mm/kasan/quarantine.c:236
 ra : kasan_quarantine_put+0x198/0x1fa mm/kasan/quarantine.c:234
epc : ffffffff80aa9ef4 ra : ffffffff80aaa002 sp : ffff8f8000107890
 gp : ffffffff89c4eee0 tp : ffffaf8012ae3480 t0 : ffff8f8000107870
 t1 : 0000000000000004 t2 : 1ffff1f000020ea4 s0 : ffff8f80001078d0
 s1 : 000000000008f600 a0 : 0000000000000000 a1 : ffffffff87d48a70
 a2 : 0000000000000003 a3 : 0000000000000100 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : 00000000307e9561
 s2 : ffffaf8030182340 s3 : 0000000000000002 s4 : ffffaf8011401780
 s5 : 0000000000000000 s6 : 0000000000000000 s7 : 0000000000000014
 s8 : 000001e9d5d48670 s9 : 0000000000002710 s10: ffffffff89c8f3c0
 s11: 1ffff5f006030469 t3 : 29e476ff00000000 t4 : fffffffef21e9dc0
 t5 : fffffffef21e9dc1 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80aa9ef4>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff80aa9ef4>] kasan_quarantine_put+0x8a/0x1fa mm/kasan/quarantine.c:234
[<ffffffff80aa5e84>] __kasan_slab_free+0x56/0x68 mm/kasan/common.c:271
[<ffffffff80a01aea>] kasan_slab_free include/linux/kasan.h:233 [inline]
[<ffffffff80a01aea>] slab_free_hook mm/slub.c:2381 [inline]
[<ffffffff80a01aea>] slab_free mm/slub.c:4643 [inline]
[<ffffffff80a01aea>] kfree+0x252/0x4da mm/slub.c:4842
[<ffffffff80a04c2a>] slab_free_after_rcu_debug+0x9a/0x378 mm/slub.c:4680
[<ffffffff8037c07a>] rcu_do_batch kernel/rcu/tree.c:2576 [inline]
[<ffffffff8037c07a>] rcu_core+0xa24/0x1ea0 kernel/rcu/tree.c:2832
[<ffffffff8037d904>] rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2849
[<ffffffff8015c6d2>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff8015d61c>] run_ksoftirqd kernel/softirq.c:968 [inline]
[<ffffffff8015d61c>] run_ksoftirqd+0xce/0x144 kernel/softirq.c:960
[<ffffffff801f1f6c>] smpboot_thread_fn+0x420/0xc80 kernel/smpboot.c:164
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327