INFO: task syz.0.17:6035 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:23824 pid:6035  tgid:6035  ppid:5974   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: 0033:0x7fb9740550b3
RSP: 002b:00007ffd1f61f270 EFLAGS: 00010246
RAX: 0000200000000180 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055556695f3c8
RBP: 00007ffd1f61f378 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fb9743b5fac
R13: 00007fb9743b5fa0 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: 6747 Comm: syz.1.240 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:lru_gen_in_fault include/linux/mm_inline.h:123 [inline]
RIP: 0010:folio_add_lru+0x18a/0x3d0 mm/swap.c:507
Code: ff 49 81 e7 00 00 04 00 0f 85 c7 00 00 00 65 4c 8b 3c 25 08 10 c2 92 4d 8d a7 90 05 00 00 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 <84> c0 0f 85 52 01 00 00 45 8b 24 24 44 89 e6 83 e6 40 31 ff e8 9d
RSP: 0018:ffffc9000ab37848 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffea00016fd240 RCX: ffff888026111e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffd40002dfa49 R08: ffffea00016fd247 R09: 1ffffd40002dfa48
R10: dffffc0000000000 R11: fffff940002dfa49 R12: ffff888026112390
R13: dffffc0000000000 R14: ffffea00016fd248 R15: ffff888026111e00
FS:  0000555572a2e500(0000) GS:ffff8881259ff000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e155ff000 CR3: 00000000311aa000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 shmem_alloc_and_add_folio+0xcb3/0xf60 mm/shmem.c:2006
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2597
 shmem_get_folio mm/shmem.c:2703 [inline]
 shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3353
 generic_perform_write+0x2c2/0x900 mm/filemap.c:4188
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3528
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 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: 0033:0x7f6e1d58d69f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007ffcceacf0d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f6e1d58d69f
RDX: 0000000001000000 RSI: 00007f6e14600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000001f78a
R10: 000020000005e5c2 R11: 0000000000000293 R12: 0000000000000003
R13: 00007ffcceacf1d0 R14: 00007ffcceacf190 R15: 00007f6e14600000
 </TASK>