INFO: task syz.0.2333:9518 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc7-syzkaller-g21ef6a269833 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2333      state:D stack:0     pid:9518  tgid:9518  ppid:3189   task_flags:0x40004c flags:0x00000004
Call Trace:
[<ffffffff863fdc06>] context_switch kernel/sched/core.c:5397 [inline]
[<ffffffff863fdc06>] __schedule+0x105c/0x4088 kernel/sched/core.c:6786
[<ffffffff86400cf6>] __schedule_loop kernel/sched/core.c:6864 [inline]
[<ffffffff86400cf6>] schedule+0xc4/0x35e kernel/sched/core.c:6879
[<ffffffff8641532a>] schedule_timeout+0x1c6/0x2b2 kernel/time/sleep_timeout.c:75
[<ffffffff86402892>] do_wait_for_common+0x1c2/0x3d0 kernel/sched/completion.c:95
[<ffffffff86402dd0>] __wait_for_common kernel/sched/completion.c:116 [inline]
[<ffffffff86402dd0>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff86402dd0>] wait_for_completion+0x40/0x5c kernel/sched/completion.c:148
[<ffffffff80d8d22c>] exit_aio+0x2d6/0x33e fs/aio.c:927
[<ffffffff8013f9b0>] __mmput+0x8a/0x3ba kernel/fork.c:1118
[<ffffffff8013fd54>] mmput+0x74/0x88 kernel/fork.c:1144
[<ffffffff8015eb36>] exit_mm kernel/exit.c:581 [inline]
[<ffffffff8015eb36>] do_exit+0x7d0/0x28b6 kernel/exit.c:952
[<ffffffff8016117c>] do_group_exit+0xd4/0x26c kernel/exit.c:1105
[<ffffffff8016135e>] __do_sys_exit_group kernel/exit.c:1116 [inline]
[<ffffffff8016135e>] __se_sys_exit_group kernel/exit.c:1114 [inline]
[<ffffffff8016135e>] __riscv_sys_exit_group+0x4a/0x54 kernel/exit.c:1114
[<ffffffff8007937a>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff863f30e6>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:343
[<ffffffff8641b87e>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:231

Showing all locks held in the system:
3 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/38:
 #0: ffffffff885dbd80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
1 lock held by syslogd/2998:
2 locks held by getty/3155:
 #0: ffffaf801d8bb0a0 (&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+0x3e4/0x12ba drivers/tty/n_tty.c:2222
2 locks held by syz-executor/3178:
3 locks held by syz-executor/3192:
2 locks held by kworker/0:0/7725:
2 locks held by kworker/1:3/8685:
3 locks held by kworker/u10:2/8936:
3 locks held by kworker/u10:6/9453:
2 locks held by syz-executor/9536:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-g21ef6a269833 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007b6f0>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff80003298>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80062c2c>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80062c2c>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff80062cc0>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff863b590a>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff863b5bd0>] nmi_trigger_cpumask_backtrace+0x2c4/0x466 lib/nmi_backtrace.c:62
[<ffffffff80089546>] arch_trigger_cpumask_backtrace+0x2c/0x42 arch/riscv/kernel/smp.c:350
[<ffffffff804fa5a8>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804fa5a8>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804fa5a8>] watchdog+0xd0e/0x11fe kernel/hung_task.c:470
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8641b9ae>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362
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-rc7-syzkaller-g21ef6a269833 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
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+0x3aa/0x612 kernel/softirq.c:414
 ra : __local_bh_enable_ip+0x3a6/0x612 kernel/softirq.c:412
epc : ffffffff80169d58 ra : ffffffff80169d54 sp : ffff8f80001070d0
 gp : ffffffff89e7f6c0 tp : ffffaf8012ee3480 t0 : ffff8f80001070f0
 t1 : 0000000000000000 t2 : fffffffff2f20000 s0 : ffff8f8000107120
 s1 : 0000000000000101 a0 : 0000000000000000 a1 : ffffffff87f79568
 a2 : 0000000000000003 a3 : 0000000000000100 a4 : 0000000000000001
 a5 : 0000000000291d8e a6 : 0000000000000001 a7 : 0000000000000000
 s2 : ffffaf8012ee3480 s3 : ffffffff85acc108 s4 : 0000000000000001
 s5 : ffffffff91238400 s6 : 1ffff5f0025dc691 s7 : ffffffff89ec0880
 s8 : ffff8f8000107360 s9 : dfffffff00000000 s10: ffff8f8000107300
 s11: ffffaf803b318a00 t3 : 1ffff5f0082e0f02 t4 : ffffffff878ae0e8
 t5 : ffffaf801c212128 t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80169d58>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff80169d58>] __local_bh_enable_ip+0x3aa/0x612 kernel/softirq.c:412
[<ffffffff85acc12c>] local_bh_enable include/linux/bottom_half.h:33 [inline]
[<ffffffff85acc12c>] ipt_do_table+0xec6/0x1ce0 net/ipv4/netfilter/ip_tables.c:357
[<ffffffff855e5626>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855e5626>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff85813172>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff85813172>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff85813172>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff858111ee>] dst_input include/net/dst.h:469 [inline]
[<ffffffff858111ee>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:448
[<ffffffff858134c6>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff858134c6>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff858134c6>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:568
[<ffffffff851c242e>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff851c26b0>] __netif_receive_skb+0x2e/0x146 net/core/dev.c:6090
[<ffffffff851c3946>] process_backlog+0x4fe/0x1dc8 net/core/dev.c:6442
[<ffffffff851c6ea4>] __napi_poll.constprop.0+0xaa/0x4c2 net/core/dev.c:7414
[<ffffffff851c7dfe>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff851c7dfe>] net_rx_action+0xb42/0xffa net/core/dev.c:7605
[<ffffffff80167428>] handle_softirqs+0x500/0x1436 kernel/softirq.c:579
[<ffffffff8016843a>] run_ksoftirqd kernel/softirq.c:968 [inline]
[<ffffffff8016843a>] run_ksoftirqd+0xdc/0x152 kernel/softirq.c:960
[<ffffffff801ffb48>] smpboot_thread_fn+0x42c/0xc98 kernel/smpboot.c:164
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8641b9ae>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362