INFO: task syz.0.10044:5557 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.10044     state:D stack:26800 pid: 5557 ppid:  4185 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 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+0x83e/0x8d0 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
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x626/0x20c0 kernel/exit.c:883
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xe7/0x12c0 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+0xee/0x180 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: 0033:0x7fbc9fd34819
RSP: 002b:00007fbc9df8e028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000004 RBX: 00007fbc9ffadfa0 RCX: 00007fbc9fd34819
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007fbc9fdcac91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc9ffae038 R14: 00007fbc9ffadfa0 R15: 00007ffd1cc06c78
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3946:
 #0: ffff88802c4fd098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
1 lock held by syz.3.11077/9014:

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3853 Comm: dhcpcd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:get_current mm/page_alloc.c:4589 [inline]
RIP: 0010:current_gfp_context include/linux/sched/mm.h:166 [inline]
RIP: 0010:fs_reclaim_acquire+0x1/0x100 mm/page_alloc.c:4590
Code: 31 c9 50 e8 21 c1 a8 ff 48 83 c4 08 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 fe 48 c7 c7 c0 e9 3d 8c e9 51 43 a9 ff 90 55 <53> 65 48 8b 1d e6 30 4e 7e 48 83 c3 2c 48 89 d8 48 c1 e8 03 48 b9
RSP: 0018:ffffc9000358f868 EFLAGS: 00000206
RAX: 5b711833cbbf5d00 RBX: ffffc9000358f8a8 RCX: 0000000000000cc0
RDX: 0000000000000001 RSI: ffffc9000358f8a8 RDI: 0000000000000cc0
RBP: 0000000000000cc0 R08: ffff88802499044f R09: 1ffff11004932089
R10: dffffc0000000000 R11: ffffed100493208a R12: 1ffff1100fbdae53
R13: ffff88801f76b088 R14: ffff888140007000 R15: 0000000000000001
FS:  00007f5b4926e740(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96e2834158 CR3: 0000000024e21000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 might_alloc include/linux/sched/mm.h:206 [inline]
 slab_pre_alloc_hook+0x20/0xc0 mm/slab.h:492
 slab_alloc_node mm/slub.c:3139 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238
 anon_vma_alloc mm/rmap.c:90 [inline]
 anon_vma_fork+0xe3/0x500 mm/rmap.c:356
 dup_mmap kernel/fork.c:574 [inline]
 dup_mm kernel/fork.c:1466 [inline]
 copy_mm+0xa06/0x13f0 kernel/fork.c:1518
 copy_process+0x17eb/0x3e20 kernel/fork.c:2290
 kernel_clone+0x23f/0x990 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2780
 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: 0033:0x7f5b49342636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd19da1a90 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd19da1a98 RCX: 00007f5b49342636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd19dc1fe0 R08: 0000000000000000 R09: 0000000000000001
R10: 00007f5b4926ea10 R11: 0000000000000246 R12: 00007ffd19da1bd0
R13: 0000000000000000 R14: 0000000000000000 R15: 000055e722f25ac0
 </TASK>