do_sysctl_args+0xd0/0x150 fs/proc/proc_sysctl.c:1719
 kernel_init+0x84/0x1d0 init/main.c:1492
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing
page has been migrated, last migrate reason: mempolicy_mbind
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 8941 Comm: syz.4.747 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154
Code: a3 c9 ff 48 89 df 48 c7 c6 60 3e 94 8b e8 93 f0 31 ff 90 0f 0b e8 3b a3 c9 ff 48 89 df 48 c7 c6 40 3d 94 8b e8 7c f0 31 ff 90 <0f> 0b e8 24 a3 c9 ff 48 89 df 48 c7 c6 60 3e 94 8b e8 65 f0 31 ff
RSP: 0000:ffffc90003d66e20 EFLAGS: 00010046
RAX: 28f6ab1ff55f5100 RBX: ffffea0005008000 RCX: 28f6ab1ff55f5100
RDX: 0000000000000005 RSI: ffffffff8dba9b22 RDI: ffff888024aa9e00
RBP: 0000000000000001 R08: ffff8880b8624253 R09: 1ffff110170c484a
R10: dffffc0000000000 R11: ffffed10170c484b R12: 0000000000000040
R13: 1ffffd4000a01000 R14: 1ffffd4000a01001 R15: ffffea0005008008
FS:  00007f73c01f26c0(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000003 CR3: 0000000028ede000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc3/0x500 mm/filemap.c:223
 filemap_remove_folio+0xe6/0x1f0 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+0x594/0x1100 fs/hugetlbfs/inode.c:593
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:716 [inline]
 hugetlbfs_fallocate+0xbc7/0x1100 fs/hugetlbfs/inode.c:742
 vfs_fallocate+0x666/0x7e0 fs/open.c:342
 madvise_remove mm/madvise.c:1049 [inline]
 madvise_vma_behavior+0x3254/0x3af0 mm/madvise.c:1346
 madvise_walk_vmas+0x51c/0xa30 mm/madvise.c:1669
 madvise_do_behavior+0x38e/0x550 mm/madvise.c:1885
 do_madvise+0x1bc/0x270 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: 0033:0x7f73c278eec9
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:00007f73c01f2038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f73c29e6360 RCX: 00007f73c278eec9
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000200000000000
RBP: 00007f73c2811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73c29e63f8 R14: 00007f73c29e6360 R15: 00007f73c2b0fa28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154
Code: a3 c9 ff 48 89 df 48 c7 c6 60 3e 94 8b e8 93 f0 31 ff 90 0f 0b e8 3b a3 c9 ff 48 89 df 48 c7 c6 40 3d 94 8b e8 7c f0 31 ff 90 <0f> 0b e8 24 a3 c9 ff 48 89 df 48 c7 c6 60 3e 94 8b e8 65 f0 31 ff
RSP: 0000:ffffc90003d66e20 EFLAGS: 00010046
RAX: 28f6ab1ff55f5100 RBX: ffffea0005008000 RCX: 28f6ab1ff55f5100
RDX: 0000000000000005 RSI: ffffffff8dba9b22 RDI: ffff888024aa9e00
RBP: 0000000000000001 R08: ffff8880b8624253 R09: 1ffff110170c484a
R10: dffffc0000000000 R11: ffffed10170c484b R12: 0000000000000040
R13: 1ffffd4000a01000 R14: 1ffffd4000a01001 R15: ffffea0005008008
FS:  00007f73c01f26c0(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000003 CR3: 0000000028ede000 CR4: 00000000003526f0