do_one_initcall+0x120/0x6e0 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d4/0x6f0 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 NOPTI
CPU: 1 UID: 0 PID: 8707 Comm: syz.2.662 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
RIP: 0010:filemap_unaccount_folio+0xef/0x8c0 mm/filemap.c:154
Code: 17 1f c9 ff 89 ee 31 ff 4c 8d 6b 30 e8 4a 1a c9 ff 85 ed 7e 17 e8 01 1f c9 ff 48 c7 c6 40 1d b9 8b 48 89 df e8 72 cf 11 00 90 <0f> 0b e8 ea 1e c9 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc9000bbc7310 EFLAGS: 00010046
RAX: 0000000000080000 RBX: ffffea0001110000 RCX: ffffc90014503000
RDX: 0000000000080000 RSI: ffffffff81f26f5e RDI: ffff888030414cc4
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880232deaa0
R13: ffffea0001110030 R14: 0000000000000240 R15: ffffea0001110000
FS:  00007fb3551f06c0(0000) GS:ffff8881247b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3551eff98 CR3: 0000000030395000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000000000 DR2: 000000000000000a
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio mm/filemap.c:223 [inline]
 filemap_remove_folio+0xf1/0x250 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+0x74a/0xed0 fs/hugetlbfs/inode.c:593
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:716 [inline]
 hugetlbfs_fallocate+0xf3f/0x12e0 fs/hugetlbfs/inode.c:742
 vfs_fallocate+0x5b1/0x10e0 fs/open.c:342
 madvise_remove mm/madvise.c:1049 [inline]
 madvise_vma_behavior+0x2ad7/0x2d60 mm/madvise.c:1346
 madvise_walk_vmas+0x31f/0x9c0 mm/madvise.c:1669
 madvise_do_behavior+0x1e2/0x530 mm/madvise.c:1885
 do_madvise+0x176/0x240 mm/madvise.c:1978
 __do_sys_madvise mm/madvise.c:1987 [inline]
 __se_sys_madvise mm/madvise.c:1985 [inline]
 __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1985
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb357b8ebe9
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:00007fb3551f0038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fb357dc6450 RCX: 00007fb357b8ebe9
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000200000000000
RBP: 00007fb357c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb357dc64e8 R14: 00007fb357dc6450 R15: 00007ffd020f3c78
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0xef/0x8c0 mm/filemap.c:154
Code: 17 1f c9 ff 89 ee 31 ff 4c 8d 6b 30 e8 4a 1a c9 ff 85 ed 7e 17 e8 01 1f c9 ff 48 c7 c6 40 1d b9 8b 48 89 df e8 72 cf 11 00 90 <0f> 0b e8 ea 1e c9 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc9000bbc7310 EFLAGS: 00010046
RAX: 0000000000080000 RBX: ffffea0001110000 RCX: ffffc90014503000
RDX: 0000000000080000 RSI: ffffffff81f26f5e RDI: ffff888030414cc4
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880232deaa0
R13: ffffea0001110030 R14: 0000000000000240 R15: ffffea0001110000
FS:  00007fb3551f06c0(0000) GS:ffff8881247b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3551eff98 CR3: 0000000030395000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000000000 DR2: 000000000000000a
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400