list_add corruption. next->prev should be prev (ffffe8ffac439110), but was ffffffff8485c760. (next=ffff8880242d6080).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 12 Comm: kworker/u32:1 Not tainted 6.14.0-rc1-syzkaller #0
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 d3 d2 8b e8 c5 e3 d6 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 d6 d1 38 fd 48 8b 34 24 48 b8 00 00
RSP: 0000:ffffc900001e7b90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8880242d6080 RCX: ffffffff8198ba69
RDX: 0000000000000000 RSI: ffffffff81991a23 RDI: 0000000000000005
RBP: ffff8880242d6080 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000007 R12: ffff888049905000
R13: ffff8880242d6088 R14: ffff888049905000 R15: ffffea0001264140
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f74a6188 CR3: 0000000057f5c000 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+0x10b9/0x25d0 mm/z3fold.c:772
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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:__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 d3 d2 8b e8 c5 e3 d6 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 d6 d1 38 fd 48 8b 34 24 48 b8 00 00
RSP: 0000:ffffc900001e7b90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8880242d6080 RCX: ffffffff8198ba69
RDX: 0000000000000000 RSI: ffffffff81991a23 RDI: 0000000000000005
RBP: ffff8880242d6080 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000007 R12: ffff888049905000
R13: ffff8880242d6088 R14: ffff888049905000 R15: ffffea0001264140
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f74a6188 CR3: 0000000057f5c000 CR4: 0000000000352ef0