INFO: task syz.0.17:6055 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:24112 pid:6055  tgid:6055  ppid:5973   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 io_schedule+0x80/0xd0 kernel/sched/core.c:7903
 folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
 folio_lock include/linux/pagemap.h:1139 [inline]
 writeback_get_folio mm/page-writeback.c:2468 [inline]
 writeback_iter+0x8d8/0x12a0 mm/page-writeback.c:2562
 iomap_writepages+0x14d/0x2d0 fs/iomap/buffered-io.c:1761
 gfs2_writepages+0x177/0x250 fs/gfs2/aops.c:175
 do_writepages+0x32e/0x550 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 __filemap_fdatawrite mm/filemap.c:425 [inline]
 filemap_fdatawrite+0x199/0x240 mm/filemap.c:430
 gfs2_ordered_write fs/gfs2/log.c:733 [inline]
 gfs2_log_flush+0x966/0x24c0 fs/gfs2/log.c:1102
 gfs2_trans_end+0x37c/0x570 fs/gfs2/trans.c:158
 gfs2_page_mkwrite+0x14a8/0x1910 fs/gfs2/file.c:535
 do_page_mkwrite+0x14d/0x310 mm/memory.c:3489
 do_shared_fault mm/memory.c:5779 [inline]
 do_fault mm/memory.c:5841 [inline]
 do_pte_missing mm/memory.c:4362 [inline]
 handle_pte_fault mm/memory.c:6182 [inline]
 __handle_mm_fault+0x1916/0x5400 mm/memory.c:6323
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6492
 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f14136550b3
RSP: 002b:00007ffd6856ddd0 EFLAGS: 00010246
RAX: 0000200000000180 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055558125e3c8
RBP: 00007ffd6856ded8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007f14139b5fac
R13: 00007f14139b5fa0 R14: fffffffffffffffe R15: 0000000000000006
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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:332 [inline]
 watchdog+0xf60/0xfa0 kernel/hung_task.c:495
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
 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: 6830 Comm: syz.1.259 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:page_table_check_free include/linux/page_table_check.h:40 [inline]
RIP: 0010:free_pages_prepare mm/page_alloc.c:1396 [inline]
RIP: 0010:free_unref_folios+0x3e3/0x14f0 mm/page_alloc.c:2952
Code: e8 d2 8e 0d 00 48 8b 03 48 b9 00 00 00 ff 7f 00 80 ff 48 21 c8 48 b9 00 00 00 00 00 f0 7f 00 48 09 c8 48 89 03 e9 c1 09 00 00 <e9> d0 09 00 00 41 83 ff 20 0f 83 df 09 00 00 41 be 01 00 00 00 44
RSP: 0018:ffffc900048773e0 EFLAGS: 00000293
RAX: ffffffff822d85c8 RBX: ffffea000161cec0 RCX: ffff88802dcdbc00
RDX: 0000000000000000 RSI: 0000000000009bbd RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88803284d4ef R09: 1ffff11006509a9d
R10: dffffc0000000000 R11: ffffed1006509a9e R12: dffffc0000000000
R13: ffffea000161ce00 R14: 0000000000000000 R15: 0000000000000000
FS:  000055555bb1d500(0000) GS:ffff8881259ff000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59b97ff000 CR3: 00000000729c6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 folios_put_refs+0x559/0x640 mm/swap.c:997
 free_pages_and_swap_cache+0x277/0x520 mm/swap_state.c:264
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497
 vms_clear_ptes+0x42c/0x540 mm/vma.c:1235
 vms_complete_munmap_vmas+0x206/0x8a0 mm/vma.c:1277
 do_vmi_align_munmap+0x358/0x420 mm/vma.c:1536
 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584
 __vm_munmap+0x23b/0x3d0 mm/vma.c:3155
 __do_sys_munmap mm/mmap.c:1080 [inline]
 __se_sys_munmap mm/mmap.c:1077 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1077
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59c178ec77
Code: 00 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc482ee4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f59c178ec77
RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007f59b8800000
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000001f78a
R10: 000020000005e5c2 R11: 0000000000000246 R12: 0000000000000003
R13: 00007ffc482ee5a0 R14: 00007ffc482ee560 R15: 00007f59b8800000
 </TASK>