INFO: task syz.4.1097:15334 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1097      state:D stack:28152 pid:15334 tgid:15333 ppid:14589  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x16dc/0x5500 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7603
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1670 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1747 [inline]
 __rt_mutex_slowlock_locked+0x1f84/0x25b0 kernel/locking/rtmutex.c:1787
 __rwbase_read_lock+0xc3/0x180 kernel/locking/rwbase_rt.c:114
 rwbase_read_lock kernel/locking/rwbase_rt.c:147 [inline]
 __down_read kernel/locking/rwsem.c:1502 [inline]
 down_read+0x132/0x200 kernel/locking/rwsem.c:1576
 __super_lock fs/super.c:60 [inline]
 super_lock+0x2d6/0x3d0 fs/super.c:122
 user_get_super+0xc8/0x120 fs/super.c:941
 quotactl_block fs/quota/quota.c:889 [inline]
 __do_sys_quotactl fs/quota/quota.c:955 [inline]
 __se_sys_quotactl+0x538/0x9a0 fs/quota/quota.c:917
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f952cc5ce59
RSP: 002b:00007f952aeae028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f952ced5fa0 RCX: 00007f952cc5ce59
RDX: 000000000000ee00 RSI: 0000200000000180 RDI: ffffffff80000700
RBP: 00007f952ccf2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 8cffffff00000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f952ced6038 R14: 00007f952ced5fa0 R15: 00007ffd35880388
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 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: 17563 Comm: sed Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:common_interrupt_return+0x44/0xcc arch/x86/entry/entry_64.S:578
Code: eb 35 cc cc cc 41 5f 41 5e 41 5d 41 5c 5d 5b 41 5b 41 5a 41 59 41 58 58 59 5a 5e 5f 48 83 c4 08 0f 01 f8 0f 00 2d 6c e9 ff ff <f6> 44 24 08 03 0f 85 a4 00 00 00 0f 0b 41 5f 41 5e 41 5d 41 5c 5d
RSP: 0000:fffffe0000049fd8 EFLAGS: 00000046
RAX: 00007ffb05c9fa80 RBX: 0000000000000001 RCX: 00000000000011bf
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000800000
RBP: 00007ffe71daa150 R08: 0000000000000040 R09: 000000000000000e
R10: 00007ffe71da9e80 R11: 0000000000000246 R12: fffffffffffffff8
R13: 000001959bdcf024 R14: 0000000000000000 R15: 00007ffb05ca1310
FS:  00007ffb058f6c80(0000) GS:ffff88812647d000(0000) knlGS:ffff88812647d000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb05b968b0 CR3: 0000000063056000 CR4: 00000000003526f0
Call Trace:
 <ENTRY_TRAMPOLINE>
RIP: 0033:0x7ffb05b0aa21
RSP: 002b:00007ffe71da9e80 EFLAGS: 00010212
 </ENTRY_TRAMPOLINE>