INFO: task syz-executor.2:10727 blocked for more than 143 seconds.
      Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:26832 pid:10727 tgid:10725 ppid:8129   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 cgrp_css_online+0x90/0x2f0 net/core/netprio_cgroup.c:157
 online_css+0xbb/0x260 kernel/cgroup/cgroup.c:5499
 css_create kernel/cgroup/cgroup.c:5570 [inline]
 cgroup_apply_control_enable+0x7d7/0xaf0 kernel/cgroup/cgroup.c:3217
 cgroup_mkdir+0xa52/0xd30 kernel/cgroup/cgroup.c:5763
 kernfs_iop_mkdir+0x253/0x3f0 fs/kernfs/dir.c:1246
 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4131
 do_mkdirat+0x264/0x3a0 fs/namei.c:4154
 __do_sys_mkdirat fs/namei.c:4169 [inline]
 __se_sys_mkdirat fs/namei.c:4167 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4167
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f0087cee9
RSP: 002b:00007f4f0155c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4f009abf80 RCX: 00007f4f0087cee9
RDX: 00000000000001ff RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f4f008c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4f009abf80 R15: 00007ffd337e69e8
 </TASK>
INFO: task syz-executor.2:10729 blocked for more than 143 seconds.
      Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.