INFO: task syz.0.44:4053 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.44        state:D stack:0     pid:4053  tgid:4052  ppid:3191   task_flags:0x400140 flags:0x00000008
Call Trace:
[<ffffffff8632de30>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff8632de30>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff86330f66>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff86330f66>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863318e8>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6935
[<ffffffff8633538c>] __mutex_lock_common kernel/locking/mutex.c:679 [inline]
[<ffffffff8633538c>] __mutex_lock+0x9be/0x1292 kernel/locking/mutex.c:747
[<ffffffff86335c74>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:799
[<ffffffff81533fa2>] bdev_release+0x12c/0x600 block/bdev.c:1128
[<ffffffff81535462>] blkdev_release+0x1a/0x26 block/fops.c:684
[<ffffffff80bfbe7a>] __fput+0x382/0xa8c fs/file_table.c:465
[<ffffffff80bfc632>] ____fput+0x1c/0x26 fs/file_table.c:493
[<ffffffff801d7c16>] task_work_run+0x16a/0x25e kernel/task_work.c:227
[<ffffffff803b556e>] resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
[<ffffffff803b556e>] exit_to_user_mode_loop+0x118/0x134 kernel/entry/common.c:114
[<ffffffff8632339c>] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
[<ffffffff8632339c>] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
[<ffffffff8632339c>] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
[<ffffffff8632339c>] do_trap_ecall_u+0x3f0/0x530 arch/riscv/kernel/traps.c:355
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197
INFO: task syz.0.44:4056 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.44        state:D stack:0     pid:4056  tgid:4052  ppid:3191   task_flags:0x400040 flags:0x0000000c
Call Trace:
[<ffffffff8632de30>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff8632de30>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff86330f66>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff86330f66>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff86331278>] io_schedule+0x78/0xd4 kernel/sched/core.c:7723
[<ffffffff808294ee>] folio_wait_bit_common+0x3a4/0x968 mm/filemap.c:1317
[<ffffffff80835186>] folio_put_wait_locked mm/filemap.c:1481 [inline]
[<ffffffff80835186>] do_read_cache_folio+0x304/0x530 mm/filemap.c:3876
[<ffffffff80835400>] read_cache_folio+0x4e/0x68 mm/filemap.c:3926
[<ffffffff815c78e0>] read_mapping_folio include/linux/pagemap.h:972 [inline]
[<ffffffff815c78e0>] read_part_sector+0xc0/0x450 block/partitions/core.c:722
[<ffffffff815c7e32>] msdos_partition+0x132/0x2590 block/partitions/msdos.c:592
[<ffffffff815c6764>] check_partition block/partitions/core.c:141 [inline]
[<ffffffff815c6764>] blk_add_partitions block/partitions/core.c:589 [inline]
[<ffffffff815c6764>] bdev_disk_changed+0x5de/0x139c block/partitions/core.c:693
[<ffffffff81531d90>] blkdev_get_whole+0x174/0x266 block/bdev.c:748
[<ffffffff81532f2e>] bdev_open+0x292/0xce6 block/bdev.c:957
[<ffffffff81539df6>] blkdev_open+0x264/0x39a block/fops.c:676
[<ffffffff80be5b4e>] do_dentry_open+0x97e/0x171e fs/open.c:964
[<ffffffff80bea7aa>] vfs_open+0xbe/0x380 fs/open.c:1094
[<ffffffff80c3d1ba>] do_open fs/namei.c:3887 [inline]
[<ffffffff80c3d1ba>] path_openat+0x1bd8/0x2a82 fs/namei.c:4046
[<ffffffff80c3e200>] do_filp_open+0x19c/0x380 fs/namei.c:4073
[<ffffffff80beb5f4>] do_sys_openat2+0x11a/0x1c2 fs/open.c:1437
[<ffffffff80bebff6>] do_sys_open fs/open.c:1452 [inline]
[<ffffffff80bebff6>] __do_sys_openat fs/open.c:1468 [inline]
[<ffffffff80bebff6>] __se_sys_openat fs/open.c:1463 [inline]
[<ffffffff80bebff6>] __riscv_sys_openat+0x178/0x1fe fs/open.c:1463
[<ffffffff800769ae>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff86323342>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:341
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
2 locks held by getty/3157:
 #0: ffffaf801d5bd0a0 (&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+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
1 lock held by sshd/3183:
4 locks held by syz-executor/3193:
1 lock held by syz.0.44/4053:
 #0: ffffaf801a25d358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x12c/0x600 block/bdev.c:1128
1 lock held by syz.0.44/4056:
 #0: ffffaf801a25d358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x3d0/0xce6 block/bdev.c:945
3 locks held by syz-executor/4100:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80078bbe>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000327a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff8006103e>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8006103e>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800610d2>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff862e5a74>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff862e5d2c>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff800863dc>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff804edb80>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804edb80>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804edb80>] watchdog+0xcf2/0x11de kernel/hung_task.c:470
[<ffffffff801ddcbc>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff8006977a>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff8634b8fa>] 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: 4100 Comm: syz-executor Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : debug_smp_processor_id+0x0/0x26 lib/smp_processor_id.c:59
 ra : rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 ra : rcu_is_watching+0x4c/0x176 kernel/rcu/tree.c:745
epc : ffffffff86325b0e ra : ffffffff80360962 sp : ffff8f8006d17080
 gp : ffffffff89c83ca0 tp : ffffaf801e898000 t0 : ffffaf8017e1ae20
 t1 : 0000000000000001 t2 : 1ffff1f000da2df0 s0 : ffff8f8006d170b0
 s1 : ffffaf801e898000 a0 : ffffaf801e898008 a1 : 0000000000000000
 a2 : 0000000000000000 a3 : 0000000000000007 a4 : 0000000000000000
 a5 : 0000000000000004 a6 : ffffffff80b9db42 a7 : ffff8d8000cc0933
 s2 : 0000000000000002 s3 : 0000000000000000 s4 : 0000000000000000
 s5 : 0000000000000000 s6 : 0000000000000000 s7 : ffffffff80b9db42
 s8 : ffffffff80b9db7e s9 : 0000000000000001 s10: 0000000000000000
 s11: 0000000000000000 t3 : e38e340900000000 t4 : fffff1af00198126
 t5 : fffff1af00198127 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff86325b0e>] debug_smp_processor_id+0x0/0x26 lib/smp_processor_id.c:49
[<ffffffff802d340e>] trace_lock_acquire include/trace/events/lock.h:24 [inline]
[<ffffffff802d340e>] lock_acquire+0x2dc/0x448 kernel/locking/lockdep.c:5834
[<ffffffff80b9db7e>] rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
[<ffffffff80b9db7e>] rcu_read_lock_sched include/linux/rcupdate.h:932 [inline]
[<ffffffff80b9db7e>] pfn_valid include/linux/mmzone.h:2158 [inline]
[<ffffffff80b9db7e>] page_table_check_set+0x136/0xe7c mm/page_table_check.c:105
[<ffffffff80b9eadc>] __page_table_check_ptes_set+0x218/0x296 mm/page_table_check.c:209
[<ffffffff8097a0b2>] page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
[<ffffffff8097a0b2>] set_ptes arch/riscv/include/asm/pgtable.h:575 [inline]
[<ffffffff8097a0b2>] __copy_present_ptes mm/memory.c:973 [inline]
[<ffffffff8097a0b2>] copy_present_ptes mm/memory.c:1056 [inline]
[<ffffffff8097a0b2>] copy_pte_range mm/memory.c:1179 [inline]
[<ffffffff8097a0b2>] copy_pmd_range mm/memory.c:1267 [inline]
[<ffffffff8097a0b2>] copy_pud_range mm/memory.c:1304 [inline]
[<ffffffff8097a0b2>] copy_p4d_range mm/memory.c:1328 [inline]
[<ffffffff8097a0b2>] copy_page_range+0x2122/0x62fa mm/memory.c:1416
[<ffffffff809a44b4>] dup_mmap+0xd50/0x1fbc mm/mmap.c:1838
[<ffffffff8013de9e>] dup_mm kernel/fork.c:1477 [inline]
[<ffffffff8013de9e>] copy_mm kernel/fork.c:1529 [inline]
[<ffffffff8013de9e>] copy_process+0x5ab0/0x716a kernel/fork.c:2169
[<ffffffff8013f784>] kernel_clone+0x128/0xc9e kernel/fork.c:2599
[<ffffffff801403f8>] __do_sys_clone+0xfe/0x13e kernel/fork.c:2742
[<ffffffff80140a84>] __se_sys_clone kernel/fork.c:2710 [inline]
[<ffffffff80140a84>] __riscv_sys_clone+0xa0/0x10e kernel/fork.c:2710
[<ffffffff800769ae>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff86323342>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:341
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197