list_add corruption. next->prev should be prev (ffffe8ffac3389d0), but was ffffffff848d5e20. (next=ffff888021c27100).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 24169 Comm: kworker/u32:17 Not tainted 6.14.0-syzkaller-02665-g1e26c5e28ca5 #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
Workqueue: zswap1 compact_page_work
RIP: 0010:__list_add_valid_or_report+0xec/0x190 lib/list_debug.c:29
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a5 00 00 00 48 8b 55 08 48 89 e9 48 c7 c7 a0 5f d3 8b e8 05 0e d0 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 36 f5 31 fd 48 8b 34 24 48 b8 00 00
RSP: 0018:ffffc900073afb90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff888022592000 RCX: ffffffff819a6dc9
RDX: 0000000000000000 RSI: ffffffff819aee0d RDI: 0000000000000005
RBP: ffff888021c27100 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888022592000
R13: ffff888021c27108 R14: ffff888021c27100 R15: ffffea00008964a8
FS:  0000000000000000(0000) GS:ffff888097d5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f73f6185 CR3: 000000002b278000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:88 [inline]
 __list_add include/linux/list.h:150 [inline]
 list_add include/linux/list.h:169 [inline]
 add_to_unbuddied mm/z3fold.c:550 [inline]
 do_compact_page+0x111d/0x2800 mm/z3fold.c:772
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c1/0xef0 kernel/workqueue.c:3400
 kthread+0x3a4/0x760 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 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:__list_add_valid_or_report+0xec/0x190 lib/list_debug.c:29
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a5 00 00 00 48 8b 55 08 48 89 e9 48 c7 c7 a0 5f d3 8b e8 05 0e d0 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 36 f5 31 fd 48 8b 34 24 48 b8 00 00
RSP: 0018:ffffc900073afb90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff888022592000 RCX: ffffffff819a6dc9
RDX: 0000000000000000 RSI: ffffffff819aee0d RDI: 0000000000000005
RBP: ffff888021c27100 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888022592000
R13: ffff888021c27108 R14: ffff888021c27100 R15: ffffea00008964a8
FS:  0000000000000000(0000) GS:ffff888097d5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f73f6185 CR3: 000000002b278000 CR4: 0000000000352ef0