INFO: task syz.3.498:10356 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.3.498       state:D stack:28088 pid:10356 tgid:10354 ppid:10064  task_flags:0x400040 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: 0033:0x7f644aafebe9
RSP: 002b:00007f644093d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f644ad26090 RCX: 00007f644aafebe9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: ffffffff80000201
RBP: 00007f644ab81e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f644ad26128 R14: 00007f644ad26090 R15: 00007ffff9c2d858
 </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: 11624 Comm: sed 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:unwind_next_frame+0x7e0/0x2390 arch/x86/kernel/unwind_orc.c:521
Code: 8b 34 24 e9 a9 02 00 00 49 8d 5e 40 48 89 d8 48 c1 e8 03 80 3c 28 00 74 11 48 89 df e8 79 d6 aa 00 48 8b 34 24 48 8b 54 24 08 <4c> 8b 23 48 8d 5a 01 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85
RSP: 0018:ffffc90000bb72f8 EFLAGS: 00000246
RAX: 1ffff92000176e81 RBX: ffffc90000bb7408 RCX: ffffffff8f380a98
RDX: ffffffff8fb2370e RSI: ffffffff8fb23712 RDI: ffffffff8b620c20
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: ffffc90000bb7418 R11: ffffffff81aae020 R12: ffffffff8fb23713
R13: ffffc90000bb7418 R14: ffffc90000bb73c8 R15: ffffc90000bb7400
FS:  00007fba06620c80(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba067f4a90 CR3: 000000002812e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4236
 anon_vma_chain_alloc mm/rmap.c:142 [inline]
 anon_vma_clone+0xb8/0x4f0 mm/rmap.c:288
 __split_vma+0x354/0x9e0 mm/vma.c:535
 split_vma mm/vma.c:598 [inline]
 vma_modify+0x1328/0x1880 mm/vma.c:1631
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1649
 mprotect_fixup+0x407/0x9c0 mm/mprotect.c:816
 do_mprotect_pkey+0x8cd/0xce0 mm/mprotect.c:990
 __do_sys_mprotect mm/mprotect.c:1011 [inline]
 __se_sys_mprotect mm/mprotect.c:1008 [inline]
 __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:1008
 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: 0033:0x7fba069b72c7
Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007ffc0cb618b8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007fba0698bb20 RCX: 00007fba069b72c7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007fba066e7000
RBP: 00007ffc0cb61b80 R08: 0000000000000000 R09: 00007fba067212e0
R10: 00007fba0698bb20 R11: 0000000000000206 R12: 0000000000000018
R13: 0000012204f76b7d R14: 0000000000000000 R15: 00007fba069cb310
 </TASK>