INFO: task syz-executor:16138 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22184 pid:16138 tgid:16138 ppid:1      task_flags:0x400140 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+0x55c/0x680 kernel/locking/rtmutex.c:1670
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1747 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1787 [inline]
 rt_mutex_slowlock+0x2d4/0x780 kernel/locking/rtmutex.c:1827
 __rt_mutex_lock kernel/locking/rtmutex.c:1842 [inline]
 __mutex_lock_common kernel/locking/rtmutex_api.c:560 [inline]
 mutex_lock_nested+0x168/0x1d0 kernel/locking/rtmutex_api.c:578
 lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
 jfs_umount+0x2da/0x3b0 fs/jfs/jfs_umount.c:124
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:647
 kill_block_super+0x44/0x90 fs/super.c:1665
 deactivate_locked_super+0xbc/0x130 fs/super.c:477
 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f716c28e097
RSP: 002b:00007fffabfe3a98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f716c3221ca RCX: 00007f716c28e097
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffabfe3b50
RBP: 00007fffabfe3b50 R08: 00007fffabfe4b50 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffabfe4be0
R13: 00007f716c3221ca R14: 0000000000071cde R15: 00007fffabfe4c20
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 21772 Comm: syz.0.1427 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:account_freepages mm/page_alloc.c:773 [inline]
RIP: 0010:page_del_and_expand mm/page_alloc.c:1732 [inline]
RIP: 0010:__rmqueue_smallest mm/page_alloc.c:1897 [inline]
RIP: 0010:__rmqueue mm/page_alloc.c:2473 [inline]
RIP: 0010:rmqueue_bulk mm/page_alloc.c:2526 [inline]
RIP: 0010:__rmqueue_pcplist+0xfdd/0x1be0 mm/page_alloc.c:3329
Code: c1 00 00 4c 89 f7 4c 89 fe 44 8b 74 24 04 44 89 f2 89 d9 45 89 e0 e8 32 d3 00 00 89 c3 48 8b 84 24 a0 00 00 00 42 0f b6 04 28 <84> c0 0f 85 fb 02 00 00 83 3d 44 28 4a 0d 00 74 1a 48 8b bc 24 98
RSP: 0018:ffffc9000774f470 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffea0001a88000 RDI: ffff88813fffbcc0
RBP: 00000000ffffffff R08: 0000000000000001 R09: 1ffff11027fff880
R10: dffffc0000000000 R11: ffffed1027fff881 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0001a88000
FS:  00007fd91f6766c0(0000) GS:ffff888126390000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3400cff8 CR3: 0000000041a06000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rmqueue_pcplist mm/page_alloc.c:3367 [inline]
 rmqueue mm/page_alloc.c:3397 [inline]
 get_page_from_freelist+0x9aa/0x28f0 mm/page_alloc.c:3938
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 alloc_pages_mpol+0xce/0x280 mm/mempolicy.c:2490
 folio_alloc_mpol_noprof+0x3b/0x1e0 mm/mempolicy.c:2509
 shmem_alloc_folio mm/shmem.c:1931 [inline]
 shmem_alloc_and_add_folio mm/shmem.c:1973 [inline]
 shmem_get_folio_gfp+0x69e/0x1b70 mm/shmem.c:2562
 shmem_get_folio mm/shmem.c:2668 [inline]
 shmem_write_begin+0x166/0x320 mm/shmem.c:3302
 generic_perform_write+0x2ad/0x8b0 mm/filemap.c:4336
 shmem_file_write_iter+0xfb/0x120 mm/shmem.c:3477
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 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: 0033:0x7fd9213dd68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fd91f675da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd91f6766c0 RCX: 00007fd9213dd68e
RDX: 0000000001000000 RSI: 00007fd917256000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007fd91f675ee0 R14: 00007fd91f675ea0 R15: 00007fd917256000
 </TASK>