INFO: task syz.3.975:9333 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.975       state:D stack:22160 pid:9333  tgid:9332  ppid:5825   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x17fa/0x4bd0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 io_schedule+0x8d/0x110 kernel/sched/core.c:7574
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1309
 __filemap_get_folio+0xaf/0xbd0 mm/filemap.c:1900
 truncate_inode_pages_range+0x57e/0xfc0 mm/truncate.c:351
 kill_bdev block/bdev.c:91 [inline]
 blkdev_flush_mapping+0x108/0x270 block/bdev.c:671
 blkdev_put_whole block/bdev.c:678 [inline]
 bdev_release+0x460/0x700 block/bdev.c:1103
 blkdev_release+0x15/0x20 block/fops.c:639
 __fput+0x23f/0x880 fs/file_table.c:431
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 get_signal+0x15e8/0x1740 kernel/signal.c:2690
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0acad7e719
RSP: 002b:00007f0acbba4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: fffffffffffffffc RBX: 00007f0acaf35f80 RCX: 00007f0acad7e719
RDX: 0000000000000046 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007f0acadf139e R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000052c R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0acaf35f80 R15: 00007fff4a0a77c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:2/35:
3 locks held by kworker/u8:4/61:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc900015c7d00 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc900015c7d00 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e93d200 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562
3 locks held by kworker/0:2/1205:
2 locks held by getty/5585:
 #0: ffff8880318160a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5833:
 #0: ffff88807d92c0e0 (&type->s_umount_key#60){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff88807d92c0e0 (&type->s_umount_key#60){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff88807d92c0e0 (&type->s_umount_key#60){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
 #1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
 #1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by kworker/u8:8/6014:
1 lock held by syz.3.975/9333:
 #0: ffff8880256464c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x17e/0x700 block/bdev.c:1087

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11285 Comm: syz.2.1515 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:copy_mc_enhanced_fast_string+0xa/0x13 arch/x86/lib/copy_mc_64.S:130
Code: 89 ca e9 89 fd ff ff 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 89 f8 48 89 d1 <f3> a4 31 c0 c3 cc cc cc cc 48 89 c8 c3 cc cc cc cc 0f 1f 44 00 00
RSP: 0000:ffffc9000f477758 EFLAGS: 00010246
RAX: ffff88807bfb9000 RBX: 0005088000000000 RCX: 0000000000000ef0
RDX: 0000000000001000 RSI: ffff88806f6c8110 RDI: ffff88807bfb9110
RBP: ffffc9000f477990 R08: ffff88806f6c8fff R09: 1ffff1100ded91ff
R10: dffffc0000000000 R11: ffffed100ded9200 R12: ffff88807ab0e5c0
R13: ffff88806f6c8000 R14: ffffc9000f477e18 R15: ffffea0001efee40
FS:  000055555eb08500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10dcd36000 CR3: 0000000055864000 CR4: 00000000003526f0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 copy_mc_user_highpage include/linux/highmem.h:349 [inline]
 __wp_page_copy_user mm/memory.c:3044 [inline]
 wp_page_copy mm/memory.c:3360 [inline]
 do_wp_page+0x1352/0x52d0 mm/memory.c:3745
 handle_pte_fault+0x10e3/0x6820 mm/memory.c:5782
 __handle_mm_fault mm/memory.c:5909 [inline]
 handle_mm_fault+0x1053/0x1ad0 mm/memory.c:6077
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f10dca511e3
Code: 8b 74 24 20 c6 42 20 01 89 72 24 8b 74 24 28 44 89 7a 28 89 72 78 48 8d 35 22 4e 2e 00 44 89 72 2c 40 88 7c 06 04 8b 44 24 24 <89> 82 80 00 00 00 31 c0 0f 1f 44 00 00 48 8b 8c 04 a0 01 00 00 48
RSP: 002b:00007ffe6ab7ec10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007f10dcd35f88 RCX: 00007f10dcb35a47
RDX: 00007f10dcd35f80 RSI: 00007f10dcd35ff8 RDI: 0000000000000000
RBP: 00007f10dcd35f8c R08: 00007f10dcd35f80 R09: 00007ffe6ab7eaa7
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f10dcd35f80 R14: 0000000000000003 R15: 0000000000000076
 </TASK>