exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xad8/0x2d70 kernel/exit.c:938
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
 get_signal+0x24ed/0x26c0 kernel/signal.c:3036
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
------------[ cut here ]------------
kernel BUG at mm/z3fold.c:1293!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 45 Comm: kcompactd1 Not tainted 6.14.0-rc7-syzkaller #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+0xc37/0x12d0 mm/z3fold.c:1293
Code: 26 93 ff 48 c7 c6 c0 fe 7d 8b 48 89 ef e8 11 a5 d9 ff 90 0f 0b e8 39 26 93 ff 48 c7 c6 20 ff 7d 8b 48 89 ef e8 fa a4 d9 ff 90 <0f> 0b e8 22 26 93 ff 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900006c7400 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888040ebc880 RSI: ffffffff8226cb96 RDI: ffff888040ebccc4
RBP: ffffea0001532f80 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90628b17 R11: 0000000000000003 R12: ffffea0001dd6a40
R13: ffffea0001532fa8 R14: 0000000000000001 R15: ffffea0001532f98
FS:  0000000000000000(0000) GS:ffff88802b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000566704c0 CR3: 00000000625b8000 CR4: 0000000000352ef0
DR0: 000000000000000e DR1: 000000000000000c DR2: 000000000000000e
DR3: 00000000000000b4 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 move_to_new_folio+0x449/0x700 mm/migrate.c:1071
 migrate_folio_move mm/migrate.c:1360 [inline]
 migrate_folios_move mm/migrate.c:1712 [inline]
 migrate_pages_batch+0x2009/0x3150 mm/migrate.c:1959
 migrate_pages_sync+0x4f1/0x910 mm/migrate.c:2016
 migrate_pages+0x1acf/0x2290 mm/migrate.c:2098
 compact_zone+0x1f66/0x4220 mm/compaction.c:2663
 kcompactd_do_work+0x43d/0x9b0 mm/compaction.c:3111
 kcompactd+0x8ad/0xdd0 mm/compaction.c:3205
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 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+0xc37/0x12d0 mm/z3fold.c:1293
Code: 26 93 ff 48 c7 c6 c0 fe 7d 8b 48 89 ef e8 11 a5 d9 ff 90 0f 0b e8 39 26 93 ff 48 c7 c6 20 ff 7d 8b 48 89 ef e8 fa a4 d9 ff 90 <0f> 0b e8 22 26 93 ff 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900006c7400 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888040ebc880 RSI: ffffffff8226cb96 RDI: ffff888040ebccc4
RBP: ffffea0001532f80 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90628b17 R11: 0000000000000003 R12: ffffea0001dd6a40
R13: ffffea0001532fa8 R14: 0000000000000001 R15: ffffea0001532f98
FS:  0000000000000000(0000) GS:ffff88802b500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f5042bac CR3: 00000000230f4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400