------------[ 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#1: syz.0.12621/13992
WARNING: mm/page_counter.c:61 at page_counter_uncharge+0xd2/0x150 mm/page_counter.c:184, CPU#1: syz.0.12621/13992
Modules linked in:
CPU: 1 UID: 0 PID: 13992 Comm: syz.0.12621 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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 bc 26 f9 ff 4d 8b 36 4d 85 f6 74 6e e8 af eb 8d ff e9 6c ff ff ff e8 a5 eb 8d ff 48 8d 3d be 8e fe 0d 4c 89 fe 48 89 da <67> 48 0f b9 3a 4c 89 f7 be 08 00 00 00 e8 26 29 f9 ff 4c 89 f0 48
RSP: 0018:ffffc900070af4f0 EFLAGS: 00010093
RAX: ffffffff8237c08b RBX: 0000000000000200 RCX: ffff88807fdc5c40
RDX: 0000000000000200 RSI: fffffffffffffe00 RDI: ffffffff90364f50
RBP: fffffffffffffe00 R08: ffff88806b59c387 R09: 1ffff1100d6b3870
R10: dffffc0000000000 R11: ffffed100d6b3871 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88806b59c380 R15: fffffffffffffe00
FS:  0000000000000000(0000) GS:ffff888125390000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2519faff8 CR3: 0000000032432000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __hugetlb_cgroup_uncharge_folio+0x15e/0x510 mm/hugetlb_cgroup.c:354
 free_huge_folio+0xaf0/0xef0 mm/hugetlb.c:1746
 folios_put_refs+0x751/0xb40 mm/swap.c:989
 folio_batch_release include/linux/folio_batch.h:101 [inline]
 remove_inode_hugepages+0xf53/0x11a0 fs/hugetlbfs/inode.c:602
 hugetlbfs_evict_inode+0xaf/0x230 fs/hugetlbfs/inode.c:617
 evict+0x61e/0xb10 fs/inode.c:841
 __dentry_kill+0x1a2/0x690 fs/dcache.c:718
 finish_dput+0xc9/0x480 fs/dcache.c:927
 __fput+0x691/0xa60 fs/file_table.c:518
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x22c0 kernel/exit.c:975
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1126
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd250b9c799
Code: Unable to access opcode bytes at 0x7fd250b9c76f.
RSP: 002b:00007ffd32df1438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd250b9c799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd32df149c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000000927c0 R14: 00000000000702f6 R15: 00007ffd32df14f0
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	bc 26 f9 ff 4d       	mov    $0x4dfff926,%esp
   7:	8b 36                	mov    (%rsi),%esi
   9:	4d 85 f6             	test   %r14,%r14
   c:	74 6e                	je     0x7c
   e:	e8 af eb 8d ff       	call   0xff8debc2
  13:	e9 6c ff ff ff       	jmp    0xffffff84
  18:	e8 a5 eb 8d ff       	call   0xff8debc2
  1d:	48 8d 3d be 8e fe 0d 	lea    0xdfe8ebe(%rip),%rdi        # 0xdfe8ee2
  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 26 29 f9 ff       	call   0xfff92962
  3c:	4c 89 f0             	mov    %r14,%rax
  3f:	48                   	rex.W