smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/z3fold.c:1293!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 30 Comm: kcompactd1 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) 
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+0xcf8/0x1240 mm/z3fold.c:1293
Code: ff 48 89 ef 48 c7 c6 e0 3f 38 8c e8 e2 cc d7 ff 90 0f 0b e8 ba 8b 8c ff 48 8b 7c 24 10 48 c7 c6 40 40 38 8c e8 c9 cc d7 ff 90 <0f> 0b 48 85 db 0f 85 83 00 00 00 0f 1f 44 00 00 e8 93 8b 8c ff e9
RSP: 0000:ffffc90000516c98 EFLAGS: 00010246
RAX: 2829296df1bc4c00 RBX: 0000000000000000 RCX: ffffffff933fc020
RDX: dffffc0000000000 RSI: ffffffff8e45b764 RDI: 0000000000000001
RBP: ffffea000119ba80 R08: ffffffff903cfd77 R09: 1ffffffff2079fae
R10: dffffc0000000000 R11: fffffbfff2079faf R12: dffffc0000000000
R13: ffffffff8c383e48 R14: 04fff00000010001 R15: 1ffffd4000233750
FS:  0000000000000000(0000) GS:ffff88808c824000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c002230340 CR3: 0000000012372000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 move_to_new_folio+0x9a9/0xc30 mm/migrate.c:1069
 migrate_folio_move mm/migrate.c:1358 [inline]
 migrate_folios_move mm/migrate.c:1710 [inline]
 migrate_pages_batch+0x1e86/0x30b0 mm/migrate.c:1957
 migrate_pages_sync mm/migrate.c:2014 [inline]
 migrate_pages+0x271c/0x36c0 mm/migrate.c:2096
 compact_zone+0x33f6/0x4b10 mm/compaction.c:2663
 compact_node+0x2e0/0x470 mm/compaction.c:2932
 kcompactd+0x903/0x1590 mm/compaction.c:3227
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:z3fold_page_migrate+0xcf8/0x1240 mm/z3fold.c:1293
Code: ff 48 89 ef 48 c7 c6 e0 3f 38 8c e8 e2 cc d7 ff 90 0f 0b e8 ba 8b 8c ff 48 8b 7c 24 10 48 c7 c6 40 40 38 8c e8 c9 cc d7 ff 90 <0f> 0b 48 85 db 0f 85 83 00 00 00 0f 1f 44 00 00 e8 93 8b 8c ff e9
RSP: 0000:ffffc90000516c98 EFLAGS: 00010246
RAX: 2829296df1bc4c00 RBX: 0000000000000000 RCX: ffffffff933fc020
RDX: dffffc0000000000 RSI: ffffffff8e45b764 RDI: 0000000000000001
RBP: ffffea000119ba80 R08: ffffffff903cfd77 R09: 1ffffffff2079fae
R10: dffffc0000000000 R11: fffffbfff2079faf R12: dffffc0000000000
R13: ffffffff8c383e48 R14: 04fff00000010001 R15: 1ffffd4000233750
FS:  0000000000000000(0000) GS:ffff88808c824000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0021d7c00 CR3: 0000000033c4c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400