INFO: task syz.1.210:5999 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.210       state:D stack:24672 pid:5999  tgid:5999  ppid:5216   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 request_wait_answer fs/fuse/dev.c:407 [inline]
 __fuse_request_send fs/fuse/dev.c:426 [inline]
 fuse_simple_request+0x1199/0x1b90 fs/fuse/dev.c:513
 fuse_flush+0x69f/0x950 fs/fuse/file.c:542
 filp_flush+0xb5/0x160 fs/open.c:1526
 filp_close+0x1e/0x40 fs/open.c:1539
 __range_close fs/file.c:718 [inline]
 __close_range+0x35e/0x940 fs/file.c:787
 __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: 0033:0x7f97997799f9
RSP: 002b:00007ffcd79641e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 0000000000021042 RCX: 00007f97997799f9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ffcd79642c0 R08: 0000000000000001 R09: 00007ffcd79644cf
R10: 00007f9799600000 R11: 0000000000000246 R12: 0000000000000032
R13: 00007ffcd79642e0 R14: 00007ffcd7964300 R15: ffffffffffffffff
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
 #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by getty/4970:
 #0: ffff88802be360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5204:
3 locks held by syz-executor/5229:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 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+0xfee/0x1030 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5229 Comm: syz-executor Not tainted 6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:check_preemption_disabled+0x4f/0x120 lib/smp_processor_id.c:55
Code: 56 74 a9 ff ff ff 7f 74 26 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 ce 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f <c3> cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02
RSP: 0018:ffffc90003797790 EFLAGS: 00000082
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888029df3c00
RDX: 0000000000000000 RSI: ffffffff8beae6e0 RDI: ffffffff8c3f9040
RBP: ffffc90003797900 R08: ffffffff81df2851 R09: 1ffff110053bea2d
R10: dffffc0000000000 R11: ffffed10053bea2e R12: 0000000000000246
R13: ffff888029df3c00 R14: 00000000ffffffff R15: ffffffff8e738340
FS:  0000555584db3500(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f863b4df580 CR3: 000000006723c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:466 [inline]
 lock_is_held_type+0x101/0x190 kernel/locking/lockdep.c:5832
 lock_is_held include/linux/lockdep.h:249 [inline]
 __might_resched+0xa5/0x780 kernel/sched/core.c:8425
 __might_fault+0x72/0x120 mm/memory.c:6385
 __clear_user arch/x86/include/asm/uaccess_64.h:165 [inline]
 copy_fpstate_to_sigframe+0x138/0xd90 arch/x86/kernel/fpu/signal.c:216
 get_sigframe+0x55d/0x700 arch/x86/kernel/signal.c:142
 x64_setup_rt_frame+0x180/0xcc0 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x458/0x860 arch/x86/kernel/signal.c:312
 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: 0033:0x7f69b416fc57
Code: 89 7c 24 10 48 89 4c 24 18 e8 55 15 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 a5 15 03 00 8b 44
RSP: 002b:00007ffd7e852c90 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000081 RCX: 00007f69b416fc57
RDX: 0000000040000001 RSI: 00007ffd7e852cec RDI: 00000000ffffffff
RBP: 00007ffd7e852cec R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000020c3b R14: 0000000000020c3b R15: 00007ffd7e852d40
 </TASK>