INFO: task syz.7.1156:11265 blocked for more than 143 seconds.
      Not tainted 6.17.0-rc2-next-20250818-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.1156      state:D stack:25256 pid:11265 tgid:11264 ppid:10752  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
 sync_bdevs+0x1ac/0x340 block/bdev.c:1288
 ksys_sync+0xb9/0x150 fs/sync.c:105
 __ia32_sys_sync+0xe/0x20 fs/sync.c:113
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7df6f8ebe9
RSP: 002b:00007f7df7d9a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f7df71b5fa0 RCX: 00007f7df6f8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7df71b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7df71b6038 R14: 00007f7df71b5fa0 R15: 00007ffefdc17688
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc2-next-20250818-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
 watchdog+0xf60/0xfa0 kernel/hung_task.c:495
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.17.0-rc2-next-20250818-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:test_states kernel/sched/psi.c:265 [inline]
RIP: 0010:psi_group_change+0x888/0x1050 kernel/sched/psi.c:861
Code: ea 83 ca 10 39 c8 0f 46 d5 89 d1 83 c9 20 45 85 c9 0f 45 ca 85 c0 0f 95 c0 0f 44 cd 81 c9 80 00 00 00 a8 01 0f 45 e9 45 09 f7 <0f> 45 e9 f7 c5 00 01 00 00 0f 84 8c 00 00 00 8b 44 24 24 83 f8 08
RSP: 0018:ffffc90000197a80 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff8880b8723f08 RCX: 0000000000000191
RDX: 0000000000000111 RSI: dffffc0000000000 RDI: 0000000000000000
RBP: 0000000000000191 R08: ffff8880b8723f00 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffed1003a57b41 R12: 0000000000000000
R13: 0000000000000010 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125b0b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000033000 CR3: 000000005996e000 CR4: 00000000003526f0
DR0: 000000000000a7d0 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 psi_task_switch+0x1b3/0x880 kernel/sched/psi.c:950
 psi_sched_switch kernel/sched/stats.h:220 [inline]
 __schedule+0x22e9/0x4cc0 kernel/sched/core.c:6955
 schedule_idle+0x52/0x90 kernel/sched/core.c:7084
 do_idle+0x4ad/0x510 kernel/sched/idle.c:358
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>