INFO: task syz.0.1229:7251 blocked for more than 430 seconds.
      Not tainted 6.13.0-rc3-syzkaller-g6f6ecce59d99 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1229      state:D stack:0     pid:7251  tgid:7250  ppid:3186   flags:0x0000000c
Call Trace:
[<ffffffff861cacc4>] context_switch kernel/sched/core.c:5369 [inline]
[<ffffffff861cacc4>] __schedule+0xdaa/0x393a kernel/sched/core.c:6756
[<ffffffff861cd918>] __schedule_loop kernel/sched/core.c:6833 [inline]
[<ffffffff861cd918>] schedule+0xc4/0x324 kernel/sched/core.c:6848
[<ffffffff861ce260>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6905
[<ffffffff861d74d4>] rwsem_down_read_slowpath+0x56a/0x91e kernel/locking/rwsem.c:1084
[<ffffffff861d7f26>] __down_read_common kernel/locking/rwsem.c:1248 [inline]
[<ffffffff861d7f26>] __down_read kernel/locking/rwsem.c:1261 [inline]
[<ffffffff861d7f26>] down_read+0xe4/0x45e kernel/locking/rwsem.c:1526
[<ffffffff80143c3a>] mmap_read_lock include/linux/mmap_lock.h:144 [inline]
[<ffffffff80143c3a>] exit_mm kernel/exit.c:546 [inline]
[<ffffffff80143c3a>] do_exit+0x810/0x296e kernel/exit.c:925
[<ffffffff801462f8>] do_group_exit+0xd4/0x26c kernel/exit.c:1087
[<ffffffff8017ce3a>] get_signal+0x1f4c/0x22de kernel/signal.c:3017
[<ffffffff8006b8c4>] arch_do_signal_or_restart+0xa3c/0x1d2c arch/riscv/kernel/signal.c:437
[<ffffffff861c1e18>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff861c1e18>] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
[<ffffffff861c1e18>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff861c1e18>] syscall_exit_to_user_mode+0x29e/0x316 kernel/entry/common.c:218
[<ffffffff861c0bde>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff861e527e>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by kthreadd/2:
1 lock held by kworker/R-mm_pe/13:
2 locks held by kworker/1:0/25:
1 lock held by khungtaskd/37:
 #0: ffffffff881d0d40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x2e6 kernel/locking/lockdep.c:6740
1 lock held by kcompactd0/40:
1 lock held by kswapd0/78:
1 lock held by klogd/2978:
1 lock held by dhcpcd/3023:
2 locks held by getty/3146:
 #0: ff6000001cd530a0 (&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 sshd/3174:
3 locks held by syz-executor/3176:
 #0: ff6000001d29b730 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
 #0: ff6000001d29b730 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x15a/0xa60 mm/memory.c:6278
 #1: ff6000001d752518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1725 [inline]
 #1: ff6000001d752518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1890 [inline]
 #1: ff6000001d752518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1da/0x10cc fs/ext4/inode.c:6158
 #2: ff6000001d754958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xdac/0x122e fs/jbd2/transaction.c:446
2 locks held by syz-executor/3186:
3 locks held by syz-executor/3190:
3 locks held by kworker/u9:1/3421:
2 locks held by kworker/0:1/6422:
 #0: ff6000005cdd3a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
 #0: ff6000005cdd3a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1523 [inline]
 #0: ff6000005cdd3a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1822 [inline]
 #0: ff6000005cdd3a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x278/0x393a kernel/sched/core.c:6680
 #1: ff6000005cdbf688 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x22c/0x71a kernel/sched/psi.c:987
5 locks held by kworker/u10:1/6593:
4 locks held by kworker/u8:0/7179:
2 locks held by syz.0.1229/7250:
1 lock held by syz.0.1229/7251:
 #0: ff600000195ab650 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline]
 #0: ff600000195ab650 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm kernel/exit.c:546 [inline]
 #0: ff600000195ab650 (&mm->mmap_lock){++++}-{4:4}, at: do_exit+0x810/0x296e kernel/exit.c:925

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-g6f6ecce59d99 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80071bd0>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000325c>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff8005e1ec>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8005e1ec>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff8005e280>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff8618497c>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86184c34>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff8007c976>] arch_trigger_cpumask_backtrace+0x2c/0x3e arch/riscv/kernel/smp.c:347
[<ffffffff804b8ee4>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff804b8ee4>] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
[<ffffffff804b8ee4>] watchdog+0xcee/0x1170 kernel/hung_task.c:397
[<ffffffff801c6dd0>] kthread+0x28c/0x3a4 kernel/kthread.c:389
[<ffffffff861e5396>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.13.0-rc3-syzkaller-g6f6ecce59d99 #0
Hardware name: riscv-virtio,qemu (DT)
epc : fq_pie_timer+0x1ce/0x5e0 net/sched/sch_fq_pie.c:399
 ra : fq_pie_timer+0x1c6/0x5e0 net/sched/sch_fq_pie.c:399
epc : ffffffff852414ea ra : ffffffff852414e2 sp : ff200000001a7810
 gp : ffffffff899f64c0 tp : ff60000012ea0000 t0 : ff4f4e6900c9eac4
 t1 : ffe3ffff00034ee8 t2 : 0000000000000871 s0 : ff200000001a78b0
 s1 : 000000000000027d a0 : 0000000000000004 a1 : 0000000000000400
 a2 : 0000000000f00000 a3 : ffffffff852414e2 a4 : 0000000000000000
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : 0000000000000003
 s2 : ff6000001c665b58 s3 : 000000000000027d s4 : 0000000000000400
 s5 : dfffffff00000000 s6 : ffebffff038ccb65 s7 : ffebffff038ccb5a
 s8 : 0000000000000400 s9 : ff6000001c665b00 s10: 0000000000000004
 s11: ff6000001c665b24 t3 : ff60000012ea0b20 t4 : ffe3ffff00034ee8
 t5 : ffe3ffff00034ee9 t6 : 000000000000000a
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff852414ea>] fq_pie_timer+0x1ce/0x5e0 net/sched/sch_fq_pie.c:399
[<ffffffff803b4286>] call_timer_fn+0x1fc/0xaae kernel/time/timer.c:1793
[<ffffffff803b5f50>] expire_timers kernel/time/timer.c:1844 [inline]
[<ffffffff803b5f50>] __run_timers+0x6ea/0x8d8 kernel/time/timer.c:2418
[<ffffffff803b6274>] __run_timer_base kernel/time/timer.c:2430 [inline]
[<ffffffff803b6274>] __run_timer_base kernel/time/timer.c:2422 [inline]
[<ffffffff803b6274>] run_timer_base+0x136/0x1b6 kernel/time/timer.c:2439
[<ffffffff803b6310>] run_timer_softirq+0x1c/0x54 kernel/time/timer.c:2449
[<ffffffff8014ccae>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:561
[<ffffffff8014dbf8>] run_ksoftirqd kernel/softirq.c:950 [inline]
[<ffffffff8014dbf8>] run_ksoftirqd+0xce/0x144 kernel/softirq.c:942
[<ffffffff801dd48e>] smpboot_thread_fn+0x654/0xb96 kernel/smpboot.c:164
[<ffffffff801c6dd0>] kthread+0x28c/0x3a4 kernel/kthread.c:389
[<ffffffff861e5396>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327