smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
------------[ cut here ]------------
kernel BUG at mm/z3fold.c:1293!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 43 Comm: kcompactd0 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #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+0xea1/0x12d0 mm/z3fold.c:1293
Code: bc 93 ff 48 c7 c6 60 4c 5d 8b 48 89 ef e8 e7 6a d9 ff 90 0f 0b e8 ff bb 93 ff 48 c7 c6 c0 4c 5d 8b 48 89 ef e8 d0 6a d9 ff 90 <0f> 0b e8 e8 bb 93 ff 49 8b 6c 24 08 31 ff 48 89 eb 83 e3 01 48 89
RSP: 0018:ffffc9000069f480 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801e574880 RSI: ffffffff81f8ebd0 RDI: ffff88801e574cc4
RBP: ffffea000087e480 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901cce8f R11: ffffffff815f48be R12: ffffea0000ae6600
R13: ffffffff8b5d54a0 R14: ffffea000087e4a8 R15: ffffea000087e498
FS:  0000000000000000(0000) GS:ffff88802b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000033914000 CR3: 000000005dca6000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 move_to_new_folio+0x449/0x700 mm/migrate.c:1077
 migrate_folio_move mm/migrate.c:1366 [inline]
 migrate_pages_batch+0x206a/0x31b0 mm/migrate.c:1897
 migrate_pages_sync+0x4c9/0x8f0 mm/migrate.c:1990
 migrate_pages+0x19ee/0x21f0 mm/migrate.c:2072
 compact_zone+0x1f68/0x4280 mm/compaction.c:2641
 compact_node+0x1a2/0x2d0 mm/compaction.c:2910
 kcompactd+0x76e/0xde0 mm/compaction.c:3208
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 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+0xea1/0x12d0 mm/z3fold.c:1293
Code: bc 93 ff 48 c7 c6 60 4c 5d 8b 48 89 ef e8 e7 6a d9 ff 90 0f 0b e8 ff bb 93 ff 48 c7 c6 c0 4c 5d 8b 48 89 ef e8 d0 6a d9 ff 90 <0f> 0b e8 e8 bb 93 ff 49 8b 6c 24 08 31 ff 48 89 eb 83 e3 01 48 89
RSP: 0018:ffffc9000069f480 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801e574880 RSI: ffffffff81f8ebd0 RDI: ffff88801e574cc4
RBP: ffffea000087e480 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901cce8f R11: ffffffff815f48be R12: ffffea0000ae6600
R13: ffffffff8b5d54a0 R14: ffffea000087e4a8 R15: ffffea000087e498
FS:  0000000000000000(0000) GS:ffff88802b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000033914000 CR3: 000000000db7c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400