INFO: task syz.4.691:14002 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.4.691       state:D stack:25064 pid:14002 tgid:14000 ppid:13206  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
 __rwbase_read_lock+0xbc/0x180 kernel/locking/rwbase_rt.c:114
 rwbase_read_lock kernel/locking/rwbase_rt.c:147 [inline]
 __down_read kernel/locking/rwsem.c:1466 [inline]
 down_read+0x127/0x1f0 kernel/locking/rwsem.c:1539
 __super_lock fs/super.c:59 [inline]
 super_lock+0x2a9/0x3b0 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: 0033:0x7fa3de0cebe9
RSP: 002b:00007fa3dc32e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fa3de2f5fa0 RCX: 00007fa3de0cebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffff80000800
RBP: 00007fa3de151e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa3de2f6038 R14: 00007fa3de2f5fa0 R15: 00007ffd268b1438
 </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: 16296 Comm: modprobe 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: 0010:mas_validate_limits lib/maple_tree.c:7506 [inline]
RIP: 0010:mt_validate+0xc54/0x4390 lib/maple_tree.c:7609
Code: f6 4c 8b b4 24 30 01 00 00 4c 89 ef 4c 89 f6 e8 c2 84 cf f6 4d 39 f5 0f 82 e8 01 00 00 e8 14 82 cf f6 4c 8b b4 24 38 01 00 00 <4c> 89 ef 4c 89 f6 e8 a1 84 cf f6 4d 39 f5 0f 87 43 02 00 00 e8 f3
RSP: 0018:ffffc900047b7880 EFLAGS: 00000293
RAX: ffffffff8aeed9dc RBX: 0000000000000002 RCX: ffff8880257e3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900047b7a50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000003 R12: ffff888032f20418
R13: 00007fe4039a1fff R14: 00007fe4039aafff R15: 0000000000000001
FS:  00007fe403940c80(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe403a7ff50 CR3: 0000000034cf8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 validate_mm+0xb6/0x4b0 mm/vma.c:651
 do_brk_flags+0x7d4/0xbb0 mm/vma.c:2814
 __do_sys_brk mm/mmap.c:194 [inline]
 __se_sys_brk+0x9bb/0xb90 mm/mmap.c:115
 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: 0033:0x7fe403aff6c7
Code: 4d 85 ed 74 e0 4d 85 e4 74 0b 48 89 ef 41 ff d4 4c 89 ee eb da 48 89 f7 e8 e6 1c f3 ff eb f1 0f 1f 40 00 b8 0c 00 00 00 0f 05 <48> 8b 15 6a a7 0d 00 48 89 02 48 39 f8 72 0a 31 c0 c3 0f 1f 80 00
RSP: 002b:00007fffbfb93ac8 EFLAGS: 00000206 ORIG_RAX: 000000000000000c
RAX: ffffffffffffffda RBX: 00005651acbaf000 RCX: 00007fe403aff6c7
RDX: 00007fe403be1e50 RSI: 00007fe403bdaac0 RDI: 00005651acbaf000
RBP: 00005651acb8e000 R08: 0000000000021000 R09: 0000000000000000
R10: 00007fe403bdaac0 R11: 0000000000000206 R12: 00007fe403be1e50
R13: 00007fe403bdab20 R14: 0000000000001000 R15: 00000000000002b0
 </TASK>