INFO: task syz.1.10:4272 blocked for more than 143 seconds.
      Not tainted 5.15.185-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.10        state:D stack:23760 pid: 4272 ppid:  4167 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 perf_pending_task_sync+0x13c/0x1c0 kernel/events/core.c:5127
 _free_event+0x34/0xe60 kernel/events/core.c:5133
 put_event kernel/events/core.c:5258 [inline]
 perf_event_release_kernel+0x832/0x8c0 kernel/events/core.c:5383
 perf_release+0x37/0x40 kernel/events/core.c:5393
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 get_signal+0x1222/0x12c0 kernel/signal.c:2672
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f264355b929
RSP: 002b:00007f26413c2fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 00007f2643782fa0 RCX: 00007f264355b929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000630c1000
RBP: 00007f26435ddb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2643782fa0 R15: 00007ffeb3032818
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3937:
 #0: ffff88814cccc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002ce62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
1 lock held by syz.7.1340/9214:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9214 Comm: syz.7.1340 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4700 [inline]
RIP: 0010:__lock_acquire+0x6b5/0x7c60 kernel/locking/lockdep.c:4962
Code: 69 63 00 00 45 8b bd e8 0a 00 00 41 8d 47 ff 83 f8 ff 41 bc ff ff ff ff 44 0f 4c e0 49 81 c5 10 0b 00 00 41 ff c4 45 8d 77 01 <49> ff cf 44 89 f0 83 c0 fe 0f 88 70 01 00 00 44 89 fb 81 e3 ff ff
RSP: 0018:ffffc900000078e0 EFLAGS: 00000056
RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ff9b0c8
RBP: ffffc90000007b30 R08: dffffc0000000000 R09: fffffbfff1ff361a
R10: fffffbfff1ff361a R11: 1ffffffff1ff3619 R12: 0000000000000000
R13: ffff888026064690 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f7dfd8046c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4318122f98 CR3: 0000000056064000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
 _raw_spin_lock_irq+0x9f/0xe0 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1694 [inline]
 __hrtimer_run_queues+0x5ff/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:get_current kernel/rcu/tree_plugin.h:397 [inline]
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:375 [inline]
RIP: 0010:__rcu_read_lock+0x0/0x50 kernel/rcu/tree_plugin.h:398
Code: ff 4c 89 ef e8 a1 f2 58 00 e9 1c fd ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 22 fd ff ff 4c 89 f7 e8 b6 f2 58 00 e9 15 fd ff ff 90 <53> 65 48 8b 1d 17 28 9e 7e 48 81 c3 3c 04 00 00 48 89 d8 48 c1 e8
RSP: 0018:ffffc9000357fb30 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffff88807c2d12d8 RCX: 0000000000000000
RDX: ffffc90010b14000 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffc9000357fc40 R08: dffffc0000000000 R09: ffffc90013412e18
R10: fffff520026825c5 R11: 1ffff920026825c3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000a04 R15: dffffc0000000000
 rcu_read_lock include/linux/rcupdate.h:737 [inline]
 is_dynamic_key+0xee/0x1f0 kernel/locking/lockdep.c:1218
 lockdep_init_map_type+0x241/0x850 kernel/locking/lockdep.c:4796
 htab_init_buckets kernel/bpf/hashtab.c:148 [inline]
 htab_map_alloc+0x9ed/0x15a0 kernel/bpf/hashtab.c:551
 find_and_alloc_map kernel/bpf/syscall.c:127 [inline]
 map_create+0x46e/0x2140 kernel/bpf/syscall.c:880
 __sys_bpf+0x2a4/0x670 kernel/bpf/syscall.c:4633
 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7dff9de929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7dfd804038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7dffc06160 RCX: 00007f7dff9de929
RDX: 0000000000000048 RSI: 0000200000001680 RDI: 0000000000000000
RBP: 00007f7dffa60b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7dffc06160 R15: 00007ffc68026418
 </TASK>