INFO: task syz.0.810:12863 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.0.810       state:D stack:0     pid:12863 tgid:12860 ppid:12135  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/37:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by getty/3150:
 #0: ff6000001d2680a0 (&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
1 lock held by syz-executor/3177:
6 locks held by kworker/u8:0/12195:
2 locks held by kworker/u9:2/12264:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff20000002ab7c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
1 lock held by syz.0.810/12863:
 #0: ff6000001a08f4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x12c/0x600 block/bdev.c:1087
2 locks held by kworker/0:4/13631:
2 locks held by syz.0.853/13776:
1 lock held by modprobe/13785:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2996 Comm: syslogd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
epc : _raw_spin_unlock_irqrestore+0x36/0xd6 kernel/locking/spinlock.c:194
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 ra : _raw_spin_unlock_irqrestore+0x86/0xd6 kernel/locking/spinlock.c:194
epc : ffffffff85ffb7aa ra : ffffffff85ffb7fa sp : ff20000007627550
 gp : ffffffff897bea80 tp : ff60000017a59a40 t0 : ff60000017a5a560
 t1 : fffffffef21573eb t2 : 0000000000000001 s0 : ff20000007627570
 s1 : 0000000000000002 a0 : 0000000000000000 a1 : ffffffff8643e620
 a2 : 0000000000000006 a3 : 0000000000000001 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : ff60000017a5a580 a7 : 1fec000002f4b4b0
 s2 : ffffffff90ab9f58 s3 : dead000000000100 s4 : dead000000000122
 s5 : dfffffff00000000 s6 : ffffffff90ab9f50 s7 : ff60000034563b40
 s8 : 0000000000000000 s9 : 0000000000000000 s10: ff60000034563c30
 s11: ff60000034563000 t3 : 1fec000002f4b4ab t4 : fffffffef21573eb
 t5 : fffffffef21573ec t6 : 1fec000002f4b4b5
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff85ffb7aa>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff85ffb7aa>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff85ffb7aa>] _raw_spin_unlock_irqrestore+0x36/0xd6 kernel/locking/spinlock.c:194
[<ffffffff814ad66a>] __debug_check_no_obj_freed lib/debugobjects.c:998 [inline]
[<ffffffff814ad66a>] debug_check_no_obj_freed+0x26a/0x4fc lib/debugobjects.c:1019
[<ffffffff808da3ba>] slab_free_hook mm/slub.c:2274 [inline]
[<ffffffff808da3ba>] slab_free mm/slub.c:4580 [inline]
[<ffffffff808da3ba>] kmem_cache_free+0x3f8/0x5f4 mm/slub.c:4682
[<ffffffff84c8b676>] kfree_skbmem+0x1b4/0x1ee net/core/skbuff.c:1148
[<ffffffff84cb042c>] __kfree_skb net/core/skbuff.c:1205 [inline]
[<ffffffff84cb042c>] consume_skb net/core/skbuff.c:1436 [inline]
[<ffffffff84cb042c>] consume_skb+0xd8/0xfa net/core/skbuff.c:1430
[<ffffffff84cc4354>] skb_free_datagram+0x1a/0x24 net/core/datagram.c:323
[<ffffffff85709b52>] __unix_dgram_recvmsg+0x7fc/0xe60 net/unix/af_unix.c:2520
[<ffffffff8570a27e>] unix_dgram_recvmsg+0xc8/0xea net/unix/af_unix.c:2537
[<ffffffff84c5dbba>] sock_recvmsg_nosec net/socket.c:1051 [inline]
[<ffffffff84c5dbba>] sock_recvmsg+0xd6/0x142 net/socket.c:1073
[<ffffffff84c5dee4>] sock_read_iter+0x2be/0x38e net/socket.c:1143
[<ffffffff80a26370>] new_sync_read fs/read_write.c:488 [inline]
[<ffffffff80a26370>] vfs_read+0x7b6/0x86c fs/read_write.c:569
[<ffffffff80a27af8>] ksys_read+0x1f0/0x266 fs/read_write.c:712
[<ffffffff80a27bdc>] __do_sys_read fs/read_write.c:722 [inline]
[<ffffffff80a27bdc>] __se_sys_read fs/read_write.c:720 [inline]
[<ffffffff80a27bdc>] __riscv_sys_read+0x6e/0x94 fs/read_write.c:720
[<ffffffff8000f2d4>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff85fd9c4a>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce