INFO: task syz.0.914:10419 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.914       state:D stack:0     pid:10419 tgid:10411 ppid:8417   flags:0x00000006
Call Trace:
[<ffffffff85fe3a74>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a74>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6664>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6664>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85fe693c>] io_schedule+0x78/0xd4 kernel/sched/core.c:7552
[<ffffffff806fac7c>] folio_wait_bit_common+0x398/0x944 mm/filemap.c:1309
[<ffffffff80705210>] __folio_lock mm/filemap.c:1647 [inline]
[<ffffffff80705210>] folio_lock include/linux/pagemap.h:1148 [inline]
[<ffffffff80705210>] folio_lock include/linux/pagemap.h:1144 [inline]
[<ffffffff80705210>] __filemap_get_folio+0x470/0x866 mm/filemap.c:1900
[<ffffffff807454d2>] truncate_inode_pages_range+0x344/0xd78 mm/truncate.c:351
[<ffffffff80745f28>] truncate_inode_pages+0x22/0x2e mm/truncate.c:423
[<ffffffff8126feca>] kill_bdev block/bdev.c:91 [inline]
[<ffffffff8126feca>] blkdev_flush_mapping+0xf8/0x28a block/bdev.c:671
[<ffffffff8127012a>] blkdev_put_whole+0xce/0xee block/bdev.c:678
[<ffffffff81273af4>] bdev_release+0x3fe/0x600 block/bdev.c:1103
[<ffffffff81274ad6>] blkdev_release+0x1a/0x26 block/fops.c:639
[<ffffffff80a2c758>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce6c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb7c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff8010be48>] get_signal+0x1aa/0x23b0 kernel/signal.c:2690
[<ffffffff8000bb06>] arch_do_signal_or_restart+0x8d6/0x1190 arch/riscv/kernel/signal.c:437
[<ffffffff85fdac04>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fdac04>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdac04>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdac04>] syscall_exit_to_user_mode+0x2a6/0x31e kernel/entry/common.c:218
[<ffffffff85fd9b26>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
1 lock held by syslogd/2994:
2 locks held by getty/3150:
 #0: ff6000001c9350a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
3 locks held by sshd/3173:
1 lock held by syz.0.914/10419:
 #0: ff60000019d414c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x12c/0x600 block/bdev.c:1087
3 locks held by kworker/1:0/10617:
3 locks held by kworker/0:7/11504:
2 locks held by syz.1.997/11563:
2 locks held by syz.0.998/11565:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd797a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd797a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd7a0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3faae>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd66>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019974>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c3c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c3c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c3c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11000 Comm: syz.0.949 Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
epc : finish_task_switch.isra.0+0x1f6/0x942 kernel/sched/core.c:5189
 ra : raw_spin_rq_unlock_irq kernel/sched/sched.h:1517 [inline]
 ra : finish_lock_switch kernel/sched/core.c:5069 [inline]
 ra : finish_task_switch.isra.0+0x1f2/0x942 kernel/sched/core.c:5187
epc : ffffffff801843a4 ra : ffffffff801843a0 sp : ff200000035e7450
 gp : ffffffff897bea80 tp : ff60000017839a40 t0 : ff6000001783a560
 t1 : ffebffff0dd89da0 t2 : 0000000000000026 s0 : ff200000035e74d0
 s1 : 0000000000000000 a0 : 0000000000000001 a1 : ffffffff8643e620
 a2 : 0000000000000002 a3 : 0000000000000001 a4 : 0000000000000001
 a5 : 00000000001512c7 a6 : 0000000000000003 a7 : ff6000006ec4ed03
 s2 : ff6000006ec4ed18 s3 : ff6000006ec4ed00 s4 : ff6000006ec4f908
 s5 : ff60000017a74ec0 s6 : ff600000152cbb80 s7 : 0000000000000000
 s8 : ffffffff897f7f20 s9 : 1fec00000dd89f21 s10: ffffffff90b60b08
 s11: ff60000011f9b480 t3 : 1fec000002f074ab t4 : ffebffff0dd89da0
 t5 : ffebffff0dd89da1 t6 : 1fec000002f074b0
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff801843a4>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff801843a4>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1517 [inline]
[<ffffffff801843a4>] finish_lock_switch kernel/sched/core.c:5069 [inline]
[<ffffffff801843a4>] finish_task_switch.isra.0+0x1f6/0x942 kernel/sched/core.c:5187
[<ffffffff85fe3a7c>] context_switch kernel/sched/core.c:5318 [inline]
[<ffffffff85fe3a7c>] __schedule+0xd62/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe7038>] preempt_schedule_irq+0x7a/0x1aa kernel/sched/core.c:6997
[<ffffffff85fdb17e>] raw_irqentry_exit_cond_resched kernel/entry/common.c:311 [inline]
[<ffffffff85fdb17e>] raw_irqentry_exit_cond_resched kernel/entry/common.c:303 [inline]
[<ffffffff85fdb17e>] irqentry_exit+0x138/0x17a kernel/entry/common.c:354
[<ffffffff85fd9d40>] do_irq+0x34/0x48 arch/riscv/kernel/traps.c:390
[<ffffffff85ffcaa4>] _new_vmalloc_restore_context_a0+0xa0/0xce
[<ffffffff84c5e2ea>] ____sys_recvmsg+0x2ac/0x55a net/socket.c:2834