------------[ 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.0.24/6035
WARNING: mm/page_counter.c:61 at page_counter_uncharge+0xd2/0x150 mm/page_counter.c:184, CPU#0: syz.0.24/6035
Modules linked in:
CPU: 0 UID: 0 PID: 6035 Comm: syz.0.24 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 7c 88 f8 ff 4d 8b 36 4d 85 f6 74 6e e8 cf 3f 8e ff e9 6c ff ff ff e8 c5 3f 8e ff 48 8d 3d 2e ea df 0d 4c 89 fe 48 89 da <67> 48 0f b9 3a 4c 89 f7 be 08 00 00 00 e8 e6 8a f8 ff 4c 89 f0 48
RSP: 0018:ffffc900033a74f0 EFLAGS: 00010093
RAX: ffffffff82376eab RBX: 0000000000000200 RCX: ffff88802d783d00
RDX: 0000000000000200 RSI: fffffffffffffe00 RDI: ffffffff901758e0
RBP: fffffffffffffe00 R08: ffff888078a6c387 R09: 1ffff1100f14d870
R10: dffffc0000000000 R11: ffffed100f14d871 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888078a6c380 R15: fffffffffffffe00
FS:  0000000000000000(0000) GS:ffff88812545a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000273076072000 CR3: 0000000071c60000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __hugetlb_cgroup_uncharge_folio+0x15e/0x510 mm/hugetlb_cgroup.c:354
 free_huge_folio+0xaef/0x11e0 mm/hugetlb.c:1782
 folios_put_refs+0x553/0x8d0 mm/swap.c:983
 folio_batch_release include/linux/pagevec.h:101 [inline]
 remove_inode_hugepages+0xf50/0x11a0 fs/hugetlbfs/inode.c:608
 hugetlbfs_evict_inode+0xaf/0x260 fs/hugetlbfs/inode.c:623
 evict+0x61e/0xb10 fs/inode.c:846
 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
 finish_dput+0xc9/0x480 fs/dcache.c:879
 __fput+0x691/0xa70 fs/file_table.c:477
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x23c0 kernel/exit.c:976
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 __do_sys_exit_group kernel/exit.c:1129 [inline]
 __se_sys_exit_group kernel/exit.c:1127 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1127
 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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78dfd9c799
Code: Unable to access opcode bytes at 0x7f78dfd9c76f.
RSP: 002b:00007fff36876f68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f78dfd9c799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff36876fcc R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000007
R13: 00000000000927c0 R14: 0000000000018921 R15: 00007fff36877020
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	7c 88                	jl     0xffffff8c
   4:	f8                   	clc
   5:	ff 4d 8b             	decl   -0x75(%rbp)
   8:	36 4d 85 f6          	ss test %r14,%r14
   c:	74 6e                	je     0x7c
   e:	e8 cf 3f 8e ff       	call   0xff8e3fe2
  13:	e9 6c ff ff ff       	jmp    0xffffff84
  18:	e8 c5 3f 8e ff       	call   0xff8e3fe2
  1d:	48 8d 3d 2e ea df 0d 	lea    0xddfea2e(%rip),%rdi        # 0xddfea52
  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 e6 8a f8 ff       	call   0xfff88b22
  3c:	4c 89 f0             	mov    %r14,%rax
  3f:	48                   	rex.W