INFO: task syz.2.200:6682 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.200       state:D stack:24384 pid:6682  tgid:6682  ppid:6150   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5311 [inline]
 __schedule+0x184a/0x4b30 kernel/sched/core.c:6677
 __schedule_loop kernel/sched/core.c:6754 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6769
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6826
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
 inode_lock include/linux/fs.h:798 [inline]
 fuse_flush+0x28b/0x990 fs/fuse/file.c:520
 filp_flush+0xb5/0x160 fs/open.c:1526
 filp_close+0x1e/0x40 fs/open.c:1539
 __range_close fs/file.c:703 [inline]
 __close_range+0x380/0x6c0 fs/file.c:760
 __do_sys_close_range fs/open.c:1592 [inline]
 __se_sys_close_range fs/open.c:1589 [inline]
 __x64_sys_close_range+0x7a/0x90 fs/open.c:1589
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a11579e79
RSP: 002b:00007fff65e16a58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f1a11717a80 RCX: 00007f1a11579e79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1a11717a80 R08: 0000000000000006 R09: 00007fff65e16d3f
R10: 00000000005f5c98 R11: 0000000000000246 R12: 000000000001e0b9
R13: 00007fff65e16b50 R14: 00007fff65e16b70 R15: ffffffffffffffff
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4984:
 #0: ffff88802b50b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5221:
1 lock held by syz.2.200/6682:
 #0: ffff888064ed9e48 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:798 [inline]
 #0: ffff888064ed9e48 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: fuse_flush+0x28b/0x990 fs/fuse/file.c:520
2 locks held by syz.2.200/6683:
 #0: ffff88805d594420 (sb_writers#25){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2910 [inline]
 #0: ffff88805d594420 (sb_writers#25){.+.+}-{0:0}, at: vfs_fallocate+0x4ea/0x6c0 fs/open.c:333
 #1: ffff888064ed9e48 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:798 [inline]
 #1: ffff888064ed9e48 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: fuse_file_fallocate+0x321/0x970 fs/fuse/file.c:3110

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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: 6375 Comm: syz-executor Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:mark_usage kernel/locking/lockdep.c:4592 [inline]
RIP: 0010:__lock_acquire+0xb16/0x2050 kernel/locking/lockdep.c:5156
Code: ff df 85 c0 74 24 48 c7 c0 50 43 1c 90 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 a9 11 00 00 83 3d a0 25 ac 0e 00 0f 84 13 09 00 00 <83> 7c 24 60 00 48 8b 6c 24 40 0f 84 ff 00 00 00 48 8b 5c 24 20 0f
RSP: 0018:ffffc900035cf970 EFLAGS: 00000093
RAX: 0000000000000004 RBX: 0000000000000004 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: ffff8880218928e0 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff937b1817 R09: 1ffffffff26f6302
R10: dffffc0000000000 R11: fffffbfff26f6303 R12: ffff888021891e00
R13: ffff8880218928d8 R14: 1ffff11004312520 R15: ffff888021892900
FS:  000055558d2b7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83dcd15f88 CR3: 000000005c43e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
 spin_lock_irq include/linux/spinlock.h:376 [inline]
 get_signal+0x25e/0x1810 kernel/signal.c:2706
 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: 0033:0x7f7968f7bc44
Code: 89 4c 24 1c e8 ed 5a 02 00 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 04 24 e8 39 5b 02 00 48 8b 04
RSP: 002b:00007ffdc03ef6f0 EFLAGS: 00000246
RAX: 0000000000000024 RBX: 00007f7969c44620 RCX: 00007f7968f7bc44
RDX: 0000000000001000 RSI: 00007f7969c44670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f7969c44670 R15: 0000000000000000
 </TASK>