free_init_pages arch/x86/mm/init.c:936 [inline]
 free_kernel_image_pages+0xa2/0x100 arch/x86/mm/init.c:952
 kernel_init+0x31/0x1d0 init/main.c:1478
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6704 Comm: syz.2.196 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:filemap_unaccount_folio+0x44f/0x4a0 mm/filemap.c:154
Code: 9d c9 ff 48 89 df 48 c7 c6 60 4b 14 8b e8 49 eb 32 ff 90 0f 0b e8 b1 9d c9 ff 48 89 df 48 c7 c6 a0 4a 14 8b e8 32 eb 32 ff 90 <0f> 0b e8 9a 9d c9 ff 48 89 df 48 c7 c6 60 4b 14 8b e8 1b eb 32 ff
RSP: 0018:ffffc9000d016e60 EFLAGS: 00010246
RAX: 20cd74bc355c3f00 RBX: ffffea0000430000 RCX: 20cd74bc355c3f00
RDX: 0000000000000007 RSI: ffffffff8d219506 RDI: ffff8880268b8000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104863 R12: 0000000000000040
R13: 1ffffd4000086000 R14: 1ffffd4000086001 R15: ffffea0000430008
FS:  00007f5c2785b6c0(0000) GS:ffff8881268c1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3180eff8 CR3: 00000000352a4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc3/0x500 mm/filemap.c:223
 filemap_remove_folio+0xe6/0x200 mm/filemap.c:253
 hugetlb_delete_from_page_cache fs/hugetlbfs/inode.c:331 [inline]
 remove_inode_single_folio fs/hugetlbfs/inode.c:536 [inline]
 remove_inode_hugepages+0x593/0x1100 fs/hugetlbfs/inode.c:593
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:716 [inline]
 hugetlbfs_fallocate+0xbd4/0x1110 fs/hugetlbfs/inode.c:742
 vfs_fallocate+0x672/0x7f0 fs/open.c:342
 madvise_remove mm/madvise.c:1049 [inline]
 madvise_vma_behavior+0x3156/0x3a00 mm/madvise.c:1346
 madvise_walk_vmas+0x51c/0xa30 mm/madvise.c:1669
 madvise_do_behavior+0x38e/0x550 mm/madvise.c:1885
 do_madvise+0x183/0x230 mm/madvise.c:1978
 __do_sys_madvise mm/madvise.c:1987 [inline]
 __se_sys_madvise mm/madvise.c:1985 [inline]
 __x64_sys_madvise+0xa7/0xc0 mm/madvise.c:1985
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c2a29ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5c2785b038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f5c2a4d6450 RCX: 00007f5c2a29ebe9
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000200000000000
RBP: 00007f5c2a321e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5c2a4d64e8 R14: 00007f5c2a4d6450 R15: 00007ffff643afe8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x44f/0x4a0 mm/filemap.c:154
Code: 9d c9 ff 48 89 df 48 c7 c6 60 4b 14 8b e8 49 eb 32 ff 90 0f 0b e8 b1 9d c9 ff 48 89 df 48 c7 c6 a0 4a 14 8b e8 32 eb 32 ff 90 <0f> 0b e8 9a 9d c9 ff 48 89 df 48 c7 c6 60 4b 14 8b e8 1b eb 32 ff
RSP: 0018:ffffc9000d016e60 EFLAGS: 00010246
RAX: 20cd74bc355c3f00 RBX: ffffea0000430000 RCX: 20cd74bc355c3f00
RDX: 0000000000000007 RSI: ffffffff8d219506 RDI: ffff8880268b8000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104863 R12: 0000000000000040
R13: 1ffffd4000086000 R14: 1ffffd4000086001 R15: ffffea0000430008
FS:  00007f5c2785b6c0(0000) GS:ffff8881268c1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3180eff8 CR3: 00000000352a4000 CR4: 00000000003526f0