do_sys_openat2+0xd2/0x1d0 fs/open.c:1422
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/z3fold.c:1293!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 29 Comm: kcompactd1 Not tainted 6.14.0-rc2-syzkaller-gad1b832bf1cf #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:z3fold_page_migrate+0xc22/0x1170 mm/z3fold.c:1293
Code: ff 48 89 ef 48 c7 c6 80 2f 38 8c e8 28 17 d8 ff 90 0f 0b e8 a0 79 8d ff 48 8b 7c 24 10 48 c7 c6 e0 2f 38 8c e8 0f 17 d8 ff 90 <0f> 0b 48 85 db 0f 85 83 00 00 00 0f 1f 44 00 00 e8 79 79 8d ff e9
RSP: 0018:ffffc90000506ed8 EFLAGS: 00010246
RAX: 64c91aaf7afc7300 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c2aa440 RDI: 0000000000000001
RBP: ffffea00013f8200 R08: ffffffff903cdd77 R09: 1ffffffff2079bae
R10: dffffc0000000000 R11: fffffbfff2079baf R12: dffffc0000000000
R13: ffffffff8c382de8 R14: 04fff00000010001 R15: 1ffffd400027f040
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f109ec6c818 CR3: 0000000040884000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 move_to_new_folio+0x9a5/0xc20 mm/migrate.c:1071
 migrate_folio_move mm/migrate.c:1360 [inline]
 migrate_folios_move mm/migrate.c:1712 [inline]
 migrate_pages_batch+0x1e84/0x30b0 mm/migrate.c:1959
 migrate_pages_sync mm/migrate.c:2016 [inline]
 migrate_pages+0x2701/0x3680 mm/migrate.c:2098
 compact_zone+0x33d5/0x4ae0 mm/compaction.c:2663
 kcompactd_do_work mm/compaction.c:3111 [inline]
 kcompactd+0x8d1/0x14b0 mm/compaction.c:3204
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:z3fold_page_migrate+0xc22/0x1170 mm/z3fold.c:1293
Code: ff 48 89 ef 48 c7 c6 80 2f 38 8c e8 28 17 d8 ff 90 0f 0b e8 a0 79 8d ff 48 8b 7c 24 10 48 c7 c6 e0 2f 38 8c e8 0f 17 d8 ff 90 <0f> 0b 48 85 db 0f 85 83 00 00 00 0f 1f 44 00 00 e8 79 79 8d ff e9
RSP: 0018:ffffc90000506ed8 EFLAGS: 00010246
RAX: 64c91aaf7afc7300 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c2aa440 RDI: 0000000000000001
RBP: ffffea00013f8200 R08: ffffffff903cdd77 R09: 1ffffffff2079bae
R10: dffffc0000000000 R11: fffffbfff2079baf R12: dffffc0000000000
R13: ffffffff8c382de8 R14: 04fff00000010001 R15: 1ffffd400027f040
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c002c7e000 CR3: 000000004db84000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400