Freezing user space processes
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4500 at kernel/freezer.c:129 __set_task_frozen+0x1dc/0x270 kernel/freezer.c:129
Modules linked in:
CPU: 1 PID: 4500 Comm: syz.1.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 824000c5 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __set_task_frozen+0x1dc/0x270 kernel/freezer.c:129
lr : __set_task_frozen+0x1dc/0x270 kernel/freezer.c:129
sp : ffff800021837740
x29: ffff800021837740 x28: ffff0000cef23c90 x27: 000000000000001f
x26: ffff8000153e4880 x25: 0000000000002102 x24: 1fffe00019de4703
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000001
x20: 0000000000000002 x19: ffff0000cef23818 x18: 1fffe00033e6db7e
x17: 0000000000000000 x16: ffff8000082f287c x15: 000000000004ffff
x14: 0000000000000001 x13: 1fffe00019de4706 x12: 0000000000000000
x11: ff008000083abdd0 x10: 0000000000000000 x9 : ffff8000083abdd0
x8 : ffff0000c7778000 x7 : ffff8000082461e4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff8000082462ac
x2 : 0000000000000000 x1 : 0000000000000002 x0 : 0000000000000000
Call trace:
 __set_task_frozen+0x1dc/0x270 kernel/freezer.c:129
 task_call_func+0x14c/0x198 kernel/sched/core.c:4308
 __freeze_task kernel/freezer.c:139 [inline]
 freeze_task+0x1f8/0x360 kernel/freezer.c:158
 try_to_freeze_tasks+0x184/0x5a4 kernel/power/process.c:54
 freeze_processes+0xdc/0x224 kernel/power/process.c:137
 suspend_freeze_processes kernel/power/power.h:257 [inline]
 suspend_prepare kernel/power/suspend.c:372 [inline]
 enter_state kernel/power/suspend.c:589 [inline]
 pm_suspend+0x2a8/0x9b8 kernel/power/suspend.c:626
 state_store+0x214/0x2bc kernel/power/main.c:639
 kobj_attr_store+0x6c/0x90 lib/kobject.c:832
 sysfs_kf_write+0x1f8/0x274 fs/sysfs/file.c:140
 kernfs_fop_write_iter+0x390/0x4b4 fs/kernfs/file.c:352
 call_write_iter include/linux/fs.h:2271 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3c8/0x7c8 fs/read_write.c:584
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 12466
hardirqs last  enabled at (12465): [<ffff800011c9da4c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (12465): [<ffff800011c9da4c>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (12466): [<ffff800011c9d870>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (12466): [<ffff800011c9d870>] _raw_spin_lock_irqsave+0xa4/0xb0 kernel/locking/spinlock.c:162
softirqs last  enabled at (11942): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (11942): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (11935): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---