[moderation] [block?] BUG: ADDR [#NUM] SMP

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: fe98fb51bf62 Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=17880835580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f40268e91b255a59
dashboard link: https://syzkaller.appspot.com/bug?extid=e141ea605d78d1a3bb34
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
userspace arch: arm64
CC: [ax...@kernel.dk linux...@vger.kernel.org linux-...@vger.kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6643a8a0f106/disk-fe98fb51.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/719c4f08404a/vmlinux-fe98fb51.xz
kernel image: https://storage.googleapis.com/syzbot-assets/92f95113f097/Image-fe98fb51.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e141ea...@syzkaller.appspotmail.com

non-slab/vmalloc memory
list_del corruption. next->prev should be ffff0000c8621248, but was ffff80009b7a7aa0. (next=ffff0000c8621248)
Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:67!
Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
Modules linked in:
CPU: 0 UID: 0 PID: 4382 Comm: kworker/0:1H Not tainted syzkaller #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Workqueue: kblockd blk_mq_requeue_work
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __list_del_entry_valid_or_report+0x1b4/0x1b8 lib/list_debug.c:65
lr : __list_del_entry_valid_or_report+0x1b4/0x1b8 lib/list_debug.c:65
sp : ffff80009b7a7a40
x29: ffff80009b7a7a40 x28: ffff80009b7a7aa0 x27: 1fffe00018f3f546
x26: ffff0000c79faa30 x25: ffff80009b7a7aa0 x24: dfff800000000000
x23: ffff0000c8621250 x22: dfff800000000000 x21: 1fffe000190c424a
x20: ffff0000c8621248 x19: ffff0000c8621248 x18: 1fffe00035bd4c28
x17: 20747562202c3834 x16: 3231323638633030 x15: 3030666666662065
x14: 000000000000184b x13: 0000000000000001 x12: 0000000000000003
x11: 0000000000000000 x10: 0000000000000001 x9 : b8d9212c5161c700
x8 : b8d9212c5161c700 x7 : ffff800080483190 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008048dc90
x2 : 0000000100000000 x1 : ffff0000c6745880 x0 : 000000000000006d
Call trace:
__list_del_entry_valid_or_report+0x1b4/0x1b8 lib/list_debug.c:65 (P)
__list_del_entry_valid include/linux/list.h:140 [inline]
__list_del_entry include/linux/list.h:261 [inline]
list_del_init include/linux/list.h:333 [inline]
blk_mq_requeue_work+0x2b4/0x52c block/blk-mq.c:1552
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479
worker_thread+0x798/0xbd0 kernel/workqueue.c:3560
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
Code: 910a8000 aa1303e1 aa1403e3 979c681b (d4210000)
---[ end trace 0000000000000000 ]---


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup