kswapd_shrink_node mm/vmscan.c:6765 [inline]
 balance_pgdat+0xc19/0x18f0 mm/vmscan.c:6957
 kswapd+0x5ea/0xbf0 mm/vmscan.c:7226
 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: 2 UID: 0 PID: 44 Comm: kcompactd0 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #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: af 93 ff 48 c7 c6 a0 4d 5d 8b 48 89 ef e8 67 69 d9 ff 90 0f 0b e8 bf af 93 ff 48 c7 c6 00 4e 5d 8b 48 89 ef e8 50 69 d9 ff 90 <0f> 0b e8 a8 af 93 ff 49 8b 6c 24 08 31 ff 48 89 eb 83 e3 01 48 89
RSP: 0018:ffffc900006af458 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801e790000 RSI: ffffffff81f908a0 RDI: ffff88801e790444
RBP: ffffea00004c5500 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901ce60f R11: 0000000000000000 R12: ffffea0000bb0a00
R13: ffffffff8b5d55e0 R14: ffffea00004c5528 R15: ffffea00004c5518
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7f16e40 CR3: 000000000085e000 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
 kcompactd_do_work+0x2da/0xa20 mm/compaction.c:3087
 kcompactd+0x8d7/0xde0 mm/compaction.c:3186
 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: af 93 ff 48 c7 c6 a0 4d 5d 8b 48 89 ef e8 67 69 d9 ff 90 0f 0b e8 bf af 93 ff 48 c7 c6 00 4e 5d 8b 48 89 ef e8 50 69 d9 ff 90 <0f> 0b e8 a8 af 93 ff 49 8b 6c 24 08 31 ff 48 89 eb 83 e3 01 48 89
RSP: 0018:ffffc900006af458 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801e790000 RSI: ffffffff81f908a0 RDI: ffff88801e790444
RBP: ffffea00004c5500 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901ce60f R11: 0000000000000000 R12: ffffea0000bb0a00
R13: ffffffff8b5d55e0 R14: ffffea00004c5528 R15: ffffea00004c5518
FS:  0000000000000000(0000) GS:ffff88802b500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffef940dc98 CR3: 000000000db7c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400