------------[ cut here ]------------
page_counter underflow: -512 nr_pages=512
WARNING: mm/page_counter.c:61 at page_counter_cancel mm/page_counter.c:60 [inline], CPU#0: syz.0.1309/9860
WARNING: mm/page_counter.c:61 at page_counter_uncharge+0xd2/0x150 mm/page_counter.c:184, CPU#0: syz.0.1309/9860
Modules linked in:
CPU: 0 UID: 0 PID: 9860 Comm: syz.0.1309 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:page_counter_cancel mm/page_counter.c:60 [inline]
RIP: 0010:page_counter_uncharge+0xd8/0x150 mm/page_counter.c:184
Code: f7 e8 6c 2c f9 ff 4d 8b 36 4d 85 f6 74 6e e8 8f ee 8d ff e9 6c ff ff ff e8 85 ee 8d ff 48 8d 3d 6e 8c fe 0d 4c 89 fe 48 89 da <67> 48 0f b9 3a 4c 89 f7 be 08 00 00 00 e8 d6 2e f9 ff 4c 89 f0 48
RSP: 0018:ffffc9000d89f398 EFLAGS: 00010293
RAX: ffffffff823751ab RBX: 0000000000000200 RCX: ffff88807d765d00
RDX: 0000000000000200 RSI: fffffffffffffe00 RDI: ffffffff9035de20
RBP: fffffffffffffe00 R08: ffff88802928c387 R09: 1ffff11005251870
R10: dffffc0000000000 R11: ffffed1005251871 R12: ffff88802928c380
R13: dffffc0000000000 R14: ffff88802928c380 R15: fffffffffffffe00
FS:  00007fb4af0f06c0(0000) GS:ffff8881252a0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e063fff CR3: 0000000053b22000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __hugetlb_cgroup_uncharge_cgroup mm/hugetlb_cgroup.c:392 [inline]
 hugetlb_cgroup_uncharge_cgroup_rsvd+0x58/0xa0 mm/hugetlb_cgroup.c:409
 alloc_hugetlb_folio+0xdea/0x1620 mm/hugetlb.c:3008
 hugetlb_no_page+0xfdd/0x1fc0 mm/hugetlb.c:5760
 hugetlb_fault+0x570/0x12c0 mm/hugetlb.c:5992
 handle_mm_fault+0x1f44/0x3080 mm/memory.c:6732
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1678/0x2720 mm/gup.c:1428
 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
 __mm_populate+0x25f/0x390 mm/gup.c:1963
 mm_populate include/linux/mm.h:4137 [inline]
 vm_mmap_pgoff+0x353/0x4e0 mm/util.c:586
 ksys_mmap_pgoff+0x57d/0x760 mm/mmap.c:606
 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: 0033:0x7fb4ae19ce59
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:00007fb4af0f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fb4ae416090 RCX: 00007fb4ae19ce59
RDX: 0000000000000003 RSI: 0000000000ff5000 RDI: 0000200000000000
RBP: 00007fb4ae232d6f R08: ffffffffffffffff R09: 0000000000000000
R10: 00020000000ec071 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4ae416128 R14: 00007fb4ae416090 R15: 00007ffc37952f18
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	6c                   	insb   (%dx),%es:(%rdi)
   3:	2c f9                	sub    $0xf9,%al
   5:	ff 4d 8b             	decl   -0x75(%rbp)
   8:	36 4d 85 f6          	ss test %r14,%r14
   c:	74 6e                	je     0x7c
   e:	e8 8f ee 8d ff       	call   0xff8deea2
  13:	e9 6c ff ff ff       	jmp    0xffffff84
  18:	e8 85 ee 8d ff       	call   0xff8deea2
  1d:	48 8d 3d 6e 8c fe 0d 	lea    0xdfe8c6e(%rip),%rdi        # 0xdfe8c92
  24:	4c 89 fe             	mov    %r15,%rsi
  27:	48 89 da             	mov    %rbx,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 f7             	mov    %r14,%rdi
  32:	be 08 00 00 00       	mov    $0x8,%esi
  37:	e8 d6 2e f9 ff       	call   0xfff92f12
  3c:	4c 89 f0             	mov    %r14,%rax
  3f:	48                   	rex.W