INFO: task syz.3.399:9867 blocked for more than 143 seconds.
      Tainted: G        W           syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.399       state:D stack:26744 pid:9867  tgid:9866  ppid:9356   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7339
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 __super_lock fs/super.c:57 [inline]
 super_lock+0x25c/0x3b0 fs/super.c:121
 user_get_super+0xc8/0x120 fs/super.c:998
 quotactl_block fs/quota/quota.c:890 [inline]
 __do_sys_quotactl fs/quota/quota.c:955 [inline]
 __se_sys_quotactl+0x4da/0x950 fs/quota/quota.c:917
 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: 0033:0x7f7be0d9ebe9
RSP: 002b:00007f7bdf006038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f7be0fc5fa0 RCX: 00007f7be0d9ebe9
RDX: 000000000000ee00 RSI: 0000200000000000 RDI: ffffffff80000202
RBP: 00007f7be0e21e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7be0fc6038 R14: 00007f7be0fc5fa0 R15: 00007ffeaeb81fd8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
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:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/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: 12830 Comm: syz.9.651 Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0033:0x7f52a3b60b06
Code: 5e c3 66 90 44 29 d1 49 8b 53 08 45 29 c4 89 77 30 8d 04 29 41 83 e4 07 48 98 44 89 67 34 5b 0f bf 04 42 5d 41 5c 41 5d 41 5e <c3> 48 83 c7 38 be 01 00 00 00 e8 4b a0 0d 00 66 66 2e 0f 1f 84 00
RSP: 002b:00007f52a1efd498 EFLAGS: 00000202
RAX: 000000000000011d RBX: 00007f52a1efd540 RCX: 0000000000000001
RDX: 00007f52a1efd6e0 RSI: 0000000000000000 RDI: 00007f52a1efd5e0
RBP: 0000000000000102 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 00007f52a1efd540 R12: 0000000000000001
R13: 00007f52a3d3da20 R14: 0000000000000000 R15: 00007f52a1efd5e0
FS:  00007f52a1efe6c0 GS:  0000000000000000