------------[ cut here ]------------
folio_test_large(folio)
WARNING: arch/x86/kvm/../../../virt/kvm/guest_memfd.c:411 at kvm_gmem_fault_user_mapping+0x485/0x5e0 virt/kvm/guest_memfd.c:411, CPU#0: syz.0.370/6440
Modules linked in:
CPU: 0 UID: 0 PID: 6440 Comm: syz.0.370 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:kvm_gmem_fault_user_mapping+0x485/0x5e0 virt/kvm/guest_memfd.c:411
Code: 3c 08 00 74 08 4c 89 f7 e8 88 f6 ec 00 49 89 1e b8 00 02 00 00 e9 ab fc ff ff e8 a6 95 83 00 b8 00 04 00 00 e9 9c fc ff ff 90 <0f> 0b 90 48 89 df e8 00 e3 bd 00 49 89 de 49 83 c6 34 4c 89 f7 be
RSP: 0018:ffffc90004df76e8 EFLAGS: 00010202
RAX: ffffffff8141a180 RBX: ffffea00018d8000 RCX: ffff88802be18000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90004df7990 R08: ffffea00018d8007 R09: 1ffffd400031b000
R10: dffffc0000000000 R11: fffff9400031b001 R12: ffffea00018d8008
R13: 0000000000000040 R14: ffffc90004df7980 R15: 1ffff920009bef32
FS:  000055556df3a500(0000) GS:ffff888125052000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008759000 CR3: 0000000036e0e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __do_fault+0x138/0x390 mm/memory.c:5373
 do_read_fault mm/memory.c:5808 [inline]
 do_fault mm/memory.c:5942 [inline]
 do_pte_missing+0x228f/0x3750 mm/memory.c:4487
 handle_pte_fault mm/memory.c:6326 [inline]
 __handle_mm_fault mm/memory.c:6464 [inline]
 handle_mm_fault+0x1bec/0x3310 mm/memory.c:6633
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x165b/0x29d0 mm/gup.c:1428
 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
 __mm_populate+0x25f/0x390 mm/gup.c:1963
 do_mlock+0x646/0x750 mm/mlock.c:653
 __do_sys_mlock mm/mlock.c:661 [inline]
 __se_sys_mlock mm/mlock.c:659 [inline]
 __x64_sys_mlock+0x60/0x70 mm/mlock.c:659
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe44499aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca3d2d388 EFLAGS: 00000246 ORIG_RAX: 0000000000000095
RAX: ffffffffffffffda RBX: 00007fe444c15fa0 RCX: 00007fe44499aeb9
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000200000000000
RBP: 00007fe444a08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe444c15fac R14: 00007fe444c15fa0 R15: 00007fe444c15fa0
 </TASK>