syzbot

 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1138 [inline]
 free_unref_page+0x554/0xd70 mm/page_alloc.c:2460
 free_contig_range+0xb6/0x190 mm/page_alloc.c:6396
 destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
 debug_vm_pgtable+0x1d79/0x3df0 mm/debug_vm_pgtable.c:1408
 do_one_initcall+0x117/0x630 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x5c2/0x8f0 init/main.c:1547
 kernel_init+0x1c/0x2a0 init/main.c:1437
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5044 at mm/rmap.c:1252 page_add_anon_rmap+0xc33/0x1a70 mm/rmap.c:1252
Modules linked in:
CPU: 0 PID: 5044 Comm: syz-executor328 Not tainted 6.6.0-rc1-next-20230915-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:page_add_anon_rmap+0xc33/0x1a70 mm/rmap.c:1252
Code: 48 c1 eb 11 83 e3 01 89 de e8 b9 d7 b8 ff 84 db 0f 84 36 fb ff ff e8 7c dc b8 ff 48 c7 c6 00 83 99 8a 4c 89 e7 e8 dd 02 f7 ff <0f> 0b e9 1b fb ff ff e8 61 dc b8 ff 49 89 dd 31 ff 41 81 e5 ff 0f
RSP: 0018:ffffc90003b2f6d8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88807daf8000 RSI: ffffffff81cf09f3 RDI: ffffffff8ae93c60
RBP: ffff88801e872200 R08: 0000000000000000 R09: fffffbfff1d9cd5a
R10: ffffffff8ece6ad7 R11: 0000000000000001 R12: ffffea0001c90000
R13: 00fff800000a0078 R14: 0000000000000000 R15: ffffea0001ca8008
FS:  0000555555bbd380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020123008 CR3: 0000000075b7b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __split_huge_pmd_locked mm/huge_memory.c:2276 [inline]
 __split_huge_pmd+0x17d5/0x31e0 mm/huge_memory.c:2320
 split_huge_pmd_address mm/huge_memory.c:2336 [inline]
 split_huge_pmd_if_needed mm/huge_memory.c:2348 [inline]
 split_huge_pmd_if_needed mm/huge_memory.c:2339 [inline]
 vma_adjust_trans_huge+0x2da/0x560 mm/huge_memory.c:2360
 __split_vma+0xba3/0x1070 mm/mmap.c:2376
 do_vmi_align_munmap+0x2c3/0x15f0 mm/mmap.c:2462
 do_vmi_munmap+0x20e/0x450 mm/mmap.c:2621
 do_munmap+0xb1/0xf0 mm/mmap.c:2637
 mremap_to mm/mremap.c:906 [inline]
 __do_sys_mremap+0x13ff/0x1730 mm/mremap.c:1058
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3fcf93b329
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff59b1f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007fff59b1f2a8 RCX: 00007f3fcf93b329
RDX: 0000000000004000 RSI: 0000000000001000 RDI: 0000000020f18000
RBP: 00007f3fcf9ae610 R08: 000000002052f000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff59b1f298 R14: 0000000000000001 R15: 0000000000000001
 </TASK>